No.

2D201-102EN*B

SERVICE MANUAL
FOR
TOSHIBA SCANNER

TSX-021B
(2D201-102EN*B)

© TOSHIBA MEDICAL SYSTEMS CORPORATION 2005

ALL RIGHTS RESERVED
Trademarks
Asteion is a trademark of Toshiba Medical Systems Corporation.

This manual may include trademarks and registered trademarks of other companies.

Note that the ™ mark and the ® mark may or may not be used in this manual.

IMPORTANT!

1. No part of this manual may be copied or reprinted, in whole or in part,

without prior written permission.

2. The contents of this manual are subject to change without prior notice
and without legal obligation.

3. The contents of this manual are correct to the best of our knowledge.
Please inform us of any ambiguous or erroneous descriptions, missing
information, etc.

No. 2D201-102EN*B
 REVISION RECORD

REV. DATE REASON PAGE SER. DOC.

(MM/YY) /AUTHOR CHANGED No. PRODUCT.

INI. 06/'05 Mr. Fujise ------- KD-WIX

*A 09/'05 Change of maintenance tool Mr. Kondo P. 290, 291

*B 10/'05 Mr. Fujise Front cover

No. 2D201-102EN*B
3
Safety Precautions

1. Meaning of Signal Words

In this manual, the signal words DANGER, WARNING, and CAUTION are used
regarding important safety instructions. The signal words and their meanings are defined as
follows. Please understand their meanings clearly before reading this manual.

Signal word Meaning

Indicates an imminently hazardous situation which, if not avoided,

DANGER will result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,

WARNING could result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided,

CAUTION
may result in minor or moderate injury.

CAUTION Indicates a potentially hazardous situation which, if not avoided, may

result in property damage.

No. 2D201-102EN*B
4
2. Safety Precautions

Please observe the following precautions to ensure the safety of the service engineer as well as
operators when servicing this equipment.

DANGER: 1. This system is not explosion-proof. Therefore, do not use

flammable or explosive gases near the system. If flammable or
explosive gases enter the system, a fire or explosion may occur.

2. When servicing is to be performed with the gantry cover open, be

sure to turn OFF the power of the system at the distribution board
and wait for five minutes or more to prevent workers from
receiving electric shocks or being injured due to unexpected
system operations.

3. Do not remove the covers of the console monitor and X-ray high-
voltage generator in the gantry because there are high-voltage
sections inside them. If the covers are removed, accidental
contact may occur, causing electric shock and possibly death.

Note the points listed below when it is necessary to connect

measuring instruments such as an oscilloscope to a circuit of the
floating section such as the DRV PWB, the inverter PWB, etc. for
any reason. Failure to observe the following precautions may
result in damage to the system.

• Use a differential probe or isolation probe.

• Do not leave the probe cable dangling when the probe is
connected to the measuring point. Doing so may cause shock
or short-circuit with the exposed GND section of the connector.
• When several measuring points are monitored simultaneously
using an oscilloscope, note that the ground levels of the probes
become common.

4. If it is necessary to perform servicing with the system turned ON,

supply power only to the required parts. At the same time, take
safety measures such as turning OFF the power of the cover
switch and NFB120 (power to the rotation servo motor).

5. If it is necessary to rotate the gantry with the cover open, take

special precautions to ensure that persons are not accidentally
caught in the rotation section.

No. 2D201-102EN*B
5
DANGER: 6. When disconnecting the high-voltage cable, observe the following
to fully discharge its residual charge in order to ensure safety
during servicing work.

• Turn power OFF and wait five minutes or more.

• When the high-voltage cable has been disconnected,
simultaneously ground two of the three pins at the top of the
bushing in all three combinations. Repeat all combinations
twice or more.
• Do not touch the top of the bushing.
• Place a cap, vinyl cover, etc. over the tip of the bushing to
protect it.

7. Hazardous voltage in the LCSR (slipring section) and brush

section will cause electric shock. Do not remove the rear dome
cover. If it is necessary to remove the rear dome cover, turn OFF
the breaker before mounting/removing the rear dome cover.
Do not turn ON the power of the gantry when the rear dome cover
is removed.

8. When it is necessary to touch the slipring or brushes (for example,

to clean the slipring or to replace the slipring brushes), turn OFF
all the breakers on the distribution board in advance. Otherwise,
an electric shock will result.

9. Gantry rotation may continue even if an eXam Plan is interrupted.

Particularly when servicing work (phantom replacement etc.) is
performed with the gantry cover open, observe the following.

• Be sure to terminate the eXam Plan and confirm that rotation of

the rotation section has stopped.
• Turn OFF CP320 (power to the rotation servo motor).

10. Do not remove the covers of the console monitor and X-ray high-
voltage generator in the gantry because there are high-voltage
sections inside them. If the covers are removed, accidental
contact may occur, causing electric shock and possibly death.

11. Do not change the setting of DIP switch S1 on the microcomputer

circuit while power is supplied to the starter for CXB-400C
because there is a risk of electrical shock.

No. 2D201-102EN*B
6
WARNING: 1. Before starting service procedures, turn OFF the breaker and all
the system power switches on the distribution board. (To ensure
safety.)

2. Make sure that ground cables are securely connected for

electrical shock prevention and stable system operation.

3. The system employs a laser beam device. Do not look directly

into the laser beam, as doing so could injure your eyes.

4. Use the cover switch, CP320, rotation lock pins, etc. to prevent
inadvertent gantry rotation during servicing work in order to
ensure safety of the workers.

5. After opening the gantry front cover, support the cover with two
supporting poles to the rear of the cover. Use the supporting
poles correctly.
If the supporting poles are used incorrectly or the cover is lifted
inadvertently, the supporting poles may fall causing the cover to
close suddenly due to its weight, resulting in injury.

6. Since the rotation section of gantry may rotate suddenly,

carefully install the CT scanner. (For example, when console is
changed to "eXam Plan" during operation or a short-circuit is
caused by any part being touched with the probe of the
measuring instrument.)

7. If a part of the rotation section of gantry is to be removed, be

sure to engage the rotation lock pin of the rotation drive section.
Otherwise, the rotation section may rotate suddenly due to the
weight imbalance caused by removal of the part, and a worker
may get caught in the rotation section and be seriously injured
as a result. Hold the rotation section firmly when pulling out the
rotation lock pin.

8. For continued protection against risk or fire, replace only with

same type and rating of fuse.

9. After completing the work, be sure to confirm that all mounting

screws of the cover are tightened firmly.
If the gantry is tilted with the screws not tightened firmly, the
cover may open, fall, or interfere with objects around it, leading
to injury or damage.

10. Be sure to clean the slipring section of this system every three
months.
If abraded materials from the brush accumulate, they may
generate smoke or catch fire.

No. 2D201-102EN*B
7
CAUTION: 1. Do not modify or repair the system without permission.
Failure to do so may result in system malfunction or incorrect
system operation.

2. When repair or replacement work must be temporarily interrupted,

take appropriate measures such as closing the covers etc. to ensure
safety.

3. Connecting or using any device in combination may cause the

system to operate unstably or dangerously.

4. Make sure that the power supply, frequency, voltage and voltage
fluctuation values conform to the specifications of the system.

5. Make sure that all cable connectors are connected correctly and
that the cables and oil hoses are arranged properly.

6. Make sure that no cooling oil leaks.

7. Before starting X-ray exposure, check whether the necessary

protective measures have been taken, so that the door is closed, no
persons or X-ray sensitive materials such as film are in the scanner
room, and X-rays do not leak from the scanner room.

8. When replacing or checking parts that can be damaged by static

electricity, such as PWBs, hard disks, etc., be sure to wear an
antistatic wristband.

9. Never place your fingers between the blades, or the fingers will be
caught.

10. When tilting the gantry, never place your foot on the stand base
cover. Your foot may be caught, resulting in injury.

11. If a brush has worn unevenly, a projection may form, resulting in a

short circuit. If such a brush is found, be sure to remove the
projection using a cutter so that the brush surface is even before
performing brush alignment.

12. Do not turn ON/OFF the power of the system or the gantry during
alignment.
Otherwise, the position information of the gantry will be lost when
the power of the system or the gantry is turned ON, and the gantry
may rotate suddenly, leading to injury.

13. When rotating the gantry at the time of rotation belt tension
adjustment or rotation motor replacement, be sure to confirm that
all mounting screws that are loosened during operation are
tightened firmly to rotate the gantry.
The screws may scatter, resulting in injury.

14. Mount the Mylar ring securely.

If the Mylar sheet is not in contact with the cover, fluids such as
blood, contrast medium, etc. may leak into the system through the
gap between the Mylar sheet and the cover, resulting in damage to
the system or deterioration of image quality.

No. 2D201-102EN*B
8
CAUTION: 15. When replacing the X-ray tube, observe the following precautions.

• Be careful about the tube because the tube may move

longitudinally during this work.

• Insert the rotation lock pin into the rotation lock pin retaining
plate securely.

16. Do not touch the motor. The motor is hot and can cause burn
injury.

17. When inspection is performed with the patient couch raised with
an automotive jack, the upper frame may fall, resulting in injury if
the jack slips. Therefore, place a square piece of wood between
the frame and floor to ensure safety even if the jack slips.

18. When the procedures for lowering the patient couch from a raised
position at which a failure has occurred are performed, 200 VAC is
supplied directly to the connector. Take care to avoid electric
shock. Keep hand or head from being caught when the patient
couch is moving down.

19. Be careful not to be crushed by the upper frame when working on

the parts inside the lifter arms. Do not leave the knob detached
from the valve.
If the solenoid valve is opened in this status, the oil will leak from
the knob hole. Be sure to tighten the locking nut of the knob after
adjusting the speed. (Turn the nut clockwise to tighten.)

20. Take precautions against electric shock because power is

supplied up to the input terminal of MC113 in the servo unit even
when the circuit protector CP1 of the gantry stationary section is
turned OFF.

21. Disconnect CN451 of the KGTSM PWB to turn OFF the power of tilt
motor, rotation servo system, couch etc.
If the safety circuit is defective or if your operation was incorrect,
the tilt, rotation motor or couch may move.

No. 2D201-102EN*B
9
CAUTION: 1. Keep the site room at proper temperature and humidity, and well ventilated.
Keep the system protected from unnecessary vibration or shock.

2. When cleaning or disinfecting the system, take care not to damage the system.

* Use only the specified disinfectants and lubricants in the specified manner
and frequency. Failure to do so may result in discoloration or cracking of the
surface finish, or in damage to rubber or plastic parts.

* Do not clean the unit with organic solvents (such as paint thinner) or
abrasive cleansers because they may cause damage or discoloration.

3. When the gantry is to be tilted with the front cover open, be extremely careful
not to allow the front cover to come into contact with the ceiling or the patient
couch. Otherwise, the system may be damaged.

4. When rotating the rotation section manually, be sure to release the brake before
rotating the rotation section. Rotating the rotation section without releasing the
brake may result in system malfunction.

5. Never pull the cable when disconnecting the connector. Doing so may damage
the cable.

6. When cleaning the slipring brush, observe the following precautions.

* If burrs are found on the brushes, remove them using a cutter. Never use
sandpaper to remove burrs from the brushes. If grains from the sandpaper
enter the brushes, abnormal wear of the brushes may result.

* When removing the cover, be careful not to apply a force to the ring or to
damage it.

* Be careful handling the brushes because they are fragile.

Remove only the burrs of the brushes using a cutter.

* Take care not to allow abraded material (powder) to fall in the gantry.

* When mounting the brushes, position them at the center of the ring.

* Verify that the cable is connected correctly.

7. When removing the dome cover, be sure to disconnect the connectors located
at the top of the gantry. Otherwise, cables may be severed.

8. Do not apply an excessive force to the brake release lever when installing the
brake release lever handle. The brake release lever may be damaged.

9. Do not perform ON/OFF operation of SW320 during gantry rotation. Doing so

may damage the servo-amplifier. To turn OFF the power, use CP320.

10. When replacing the INV/HV CATHODE chassis, make sure that the wire and
the chain block are not damaged.

11. If the 2.0-MHU X-ray tube is installed in the system, do not perform 0.75-second
rotation from the gantry maintenance panel.
Doing so may damage the X-ray tube.

No. 2D201-102EN*B
10
CAUTION: 12. When SW32 on the maintenance panel is set to 8, do not perform scanning
more than 10 times in succession.
After shutdown, wait for at least 30 seconds before restarting the system.
Otherwise, the servo-amplifier may be damaged.

13. When checking the terminal log of the KGTSM PWB, do not turn the gantry
power ON/OFF or reset the KGTSM PWB. These actions will result in the
memory being cleared.

14. When checking or performing fine adjustment of the gantry rotation speed,
observe the following precautions.

• Do not set the panel switch (SW1) to OFF (upward) before all operations
from the maintenance panel are completed.

• After using the maintenance panel, be sure to set the panel switch OFF
and reset the KGTSM.

15. After offset adjustment is completed, be sure to return DSW10 on the KGTSM
PWB to its normal setting.

16. After adjustment is completed, be sure to return DSW4-4 to the OFF setting.

17. Do not perform continuous scanning (that is, a set of start and stop operations
performed consecutively) more than ten times. Doing so may damage the
servo-amplifier.
If repetitions of continuous scanning are required, stop for two minutes after
scanning is performed ten times.

18. Be extremely careful when handing the hydraulic hose. The hydraulic hose is
very fragile (minimum permissible bending radius: 45 mm). If the hose is bent,
it will permanently damaged and can no longer be used.

19. If the cables in the patient couch interfere with the solenoid valve, the solenoid
valve may be damaged and the couch may be lowered unexpectedly. Make
sure that the cables do not interfere with the solenoid valve.

No. 2D201-102EN*B
11
Precautions for Service Work

Countermeasures against static electricity

If service work is performed at sites at which countermeasures against static electricity

are not taken, be sure to take countermeasures against static electricity to prevent the
PWBs from being damaged and to ensure quality.

[Examples]

• When performing service work such as replacement of PWBs, be sure to wear a wrist
strap.
• If PWBs must be put down somewhere, they must be placed on an antistatic sheet.

Work sheet

NOTE: Periodic inspection

Be sure to perform periodic inspection to confirm that appropriate countermeasures

against static electricity are being taken (the antistatic mechanism functions normally).
(Perform continuity check.)

<Additional information>

Manufacturer : Sumitomo 3M, Inc.

Model name : 8012J

Product name : Conductive plastic product portable field service kit

Items contained : Work sheet--------------------- 1

Wrist strap --------------------- 1
4.5-m ground cable --------- 1

No. 2D201-102EN*B
12
How to Use This Manual

1. Notation conventions

(1) NOTE

This manual uses the following conventions for word usage in addition to the signal
words (refer to "Safety Precautions") that indicate remarks related to safety
precautions. Carefully read the contents of this manual before performing service
work.

NOTE: Indicates information of interest to users of equipment as to exceptional conditions or

operating procedures.

(2) Indication of references

In this manual, sections and subsections relating to the descriptions are indicated for
reference as follows.

In this example, the information related to

Î Refer to page U-1, "1. Notation the description with this indication is given
conventions", of this manual. on page U-1, "1. Notation conventions", of
this manual.

No. 2D201-102EN*B
13
 Table of Contents

Safety Precautions ......................................................................................................... 4

Precautions for Service Work .............................................................................. 12
How to Use This Manual .......................................................................................... 13

1. Configuration of Gantry....................................................... 20
1.1 Precautions ................................................................................................... 20

1.2 Configuration of Gantry ....................................................................... 22

1.3 Description of Function and Operation of

Each Unit ......................................................................................................... 23
1.3.1 Stand unit ........................................................................................................... 23

1.3.2 Main frame unit ................................................................................................ 27

1.3.3 X-ray beam control unit................................................................................ 30

1.4 Troubleshooting and Repair............................................................. 38

1.4.1 Troubleshooting and repair of the tilt section.................................... 39

1.4.2 Troubleshooting and repair of the rotation section ......................... 40

1.4.3 Troubleshooting and repair of the slipring section ......................... 43

1.4.4 Troubleshooting and repair of the wedge section ........................... 45

1.4.5 Troubleshooting and repair of the slit section................................... 46

1.4.6 Troubleshooting and repair of the beam trimmer section ............ 47

1.5 Maintenance Sections and Cover

Opening/Closing........................................................................................ 48
1.5.1 Procedures for removing/mounting the Mylar ring .......................... 49

1.5.2 Opening/closing the front cover .............................................................. 52

1.5.3 Removing/mounting the side cover ........................................................ 55

1.5.4 Removing/mounting the rear-upper cover ........................................... 56

No. 2D201-102EN*B
14
1.5.5 Removing/mounting the dome cover ..................................................... 57

1.5.6 Removing/mounting the top cover .......................................................... 58

1.5.7 Method for manually tilting the gantry in the case of

malfunction........................................................................................................ 59

1.6 Replacing Each Component ............................................................. 60

1.6.1 Replacing the projector lamp .................................................................... 60

1.6.2 Tilt drive unit maintenance ......................................................................... 61

1.6.3 Replacing the X-ray tube ............................................................................. 66

1.6.4 Replacement of the large-current slipring brushes ......................... 74

1.6.5 Replacing the gas spring ............................................................................ 77

1.6.6 Replacing the 42-kW HFG (CXXG-010A) ............................................... 78

1.6.7 Replacing the rotation motor ..................................................................... 82

1.7 Adjustment and Cleaning of Each Section............................ 83

1.7.1 Tilt angle adjustment ..................................................................................... 83

1.7.2 Rotation adjustment ...................................................................................... 85

1.7.3 Tube alignment ................................................................................................ 88

1.7.4 X-ray alignment software ............................................................................ 95

1.7.5 Projector adjustment procedure .............................................................. 96

1.7.6 Procedure for cleaning the large-current slipring ............................ 98

1.7.7 Procedure for adjusting the operating panel acrylic cover ........ 100

1.7.8 Cover cleaning method .............................................................................. 101

1.7.9 Procedures for removing the optical system ................................... 101

1.8 Important Fastening Assemblies of Each Unit ................. 104

2. Mechanical Section of the Patient

Couch .......................................................................................................... 108
2.1 Outline ............................................................................................................. 108

No. 2D201-102EN*B
15
2.1.1 Description of the structure and operation of the patient
couch ................................................................................................................. 108

2.2 Description of the Structure of the Main Patient

Couch Unit ................................................................................................... 109
2.2.1 Main frame unit .............................................................................................. 110

2.2.2 Longitudinal movement drive unit ........................................................ 110

2.2.3 Couch top moving frame ........................................................................... 112

2.2.4 Vertical movement mechanism .............................................................. 113

2.2.5 Vertical movement drive section ........................................................... 114

2.2.6 Couch top ......................................................................................................... 116

2.2.7 Upper covers .................................................................................................. 117

2.2.8 Lower covers .................................................................................................. 121

2.3 Troubleshooting and Repair........................................................... 122

2.4 Jacking Up and Lowering the Patient Couch .................... 127

2.4.1 Jacking up the patient couch .................................................................. 127

2.4.2 Lowering the patient couch...................................................................... 129

2.5 Part Replacements ................................................................................ 131

2.5.1 Replacement of the flexible cover ......................................................... 131

2.5.2 Replacement of the clutch/brake of the horizontal

drive unit........................................................................................................... 139

2.5.3 Replacement of the rolled cover ............................................................ 143

2.5.4 Replacing the hydraulic unit .................................................................... 145

2.6 Adjustments and Cleaning .............................................................. 150

2.6.1 Adjustment of vertical motion speed ................................................... 150

2.6.2 Changing the vertical stop positions ................................................... 151

2.6.3 Adjustment of horizontal motion speed ............................................. 152

2.6.4 Adjustment of gear backlash of the horizontal drive unit ........... 153

2.6.5 Adjustment of the couch top supporting roller ............................... 154

No. 2D201-102EN*B
16
2.6.6 Maintenance and inspection of the clutch/brake assembly ....... 156

2.6.7 Adjustment of belt tension ....................................................................... 158

2.6.8 Adjustment of chain tension .................................................................... 160

2.6.9 Routing of the internal cables ................................................................. 162

2.6.10 Resetting the overcurrent relay .............................................................. 163

3. Gantry/Couch Control Section................................. 165

3.1 General Outline ........................................................................................ 165

3.2 Control Section Outline, Location, and

Configuration ............................................................................................. 165
3.2.1 Outline ............................................................................................................... 165

3.2.2 Location ............................................................................................................ 165

3.2.3 Targets of control ......................................................................................... 167

3.2.4 Composition and explanation of each Unit ....................................... 168

3.2.5 Control flow ..................................................................................................... 171

3.2.6 Interlock ............................................................................................................ 173

3.2.7 List of fuses used for the gantry ............................................................ 178

3.2.8 Gantry power-supply sequence ............................................................. 181

3.2.9 Setting the DAS timer ................................................................................. 185

3.3 Outline of the PWBs ............................................................................. 189

3.3.1 Settings of KGTSM switches ................................................................... 189

3.3.2 KGTSM, connectors, and LEDs .............................................................. 191

3.3.3 VRs and Test Pins (TP) of the KGTSM PWB ..................................... 197

3.3.4 OPCONT2 switch setting ........................................................................... 198

3.3.5 Connectors, LEDs, check terminals (TP), and

DIP switches of the OPCONT2 ................................................................ 198

3.3.6 GCIF2 switch setting ................................................................................... 198

No. 2D201-102EN*B
17
3.3.7 Connectors, LEDs, check terminals (TP), and
DIP switches of the GCIF2 ........................................................................ 198

3.3.8 Setting short pins and adjusting variable resistors on the

KGTSP ............................................................................................................... 199

3.4 Use of the KGTSM Maintenance Panel ................................... 201

3.4.1 Important notices .......................................................................................... 201

3.4.2 Procedures to use the maintenance panel ........................................ 201

3.5 Obtaining KGTSM Status Information..................................... 206

3.5.1 KGTSM messages ........................................................................................ 206

3.5.2 Detailed KGTSM Status codes (including error codes and

interlock information) ................................................................................. 212

3.5.3 KGTSM timer checks (including timer errors).................................. 238

3.6 Gantry Rotation ........................................................................................ 239

3.6.1 Stop position and methods for brake release .................................. 239

3.6.2 Gantry rotation interlock (when the gantry cover is

opened) ............................................................................................................. 241

3.6.3 Offsets and rotation speed of the gantry servo motor ................. 243

3.6.4 Gantry rotation speed check ................................................................... 245

3.6.5 Adjustment of the gantry servo-amplifier offset ............................. 248

3.6.6 Adjustment of gantry rotation speed by the servo

amplifier ............................................................................................................ 251

3.6.7 Checking the rotation speed voltage sent from

KGTSM PWB to the servo speed amplifier ........................................ 252

3.6.8 Servo amplifier setting and verification .............................................. 254

3.7 Adjustment Checks ............................................................................... 273

3.7.1 Movement range setting method for couch autoslide .................. 273

3.7.2 Setting the zero-clear time for couch sliding.................................... 274

3.7.3 Procedure for setting the couch horizontal movement

absolute value control data ...................................................................... 275

No. 2D201-102EN*B
18
3.7.4 Couch-top sliding fine adjustment function setting
procedure ......................................................................................................... 278

3.7.5 Footswitch mode selection procedure ................................................ 279

3.7.6 Adjustment of couch height displays .................................................. 280

3.7.7 Checking the couch top speed ............................................................... 281

3.8 Miscellaneous ........................................................................................... 282

3.8.1 Checks and adjustments after parts replacement
(KGTSM and rotation servo amplifier) ................................................. 282

3.8.2 Explanation of the system setting switches ..................................... 282

3.8.3 Gantry X-ray tube position information .............................................. 283

3.8.4 Optical system operation .......................................................................... 286

3.8.5 Couch slide servo amplifier ..................................................................... 288

3.8.6 Check of safety circuit on the KGTSM PWB ..................................... 307

No. 2D201-102EN*B
19
1. Configuration of Gantry
1.1 Precautions
Observe the following precautions when servicing the gantry to ensure safety.

DANGER: 1. When servicing is to be performed with the gantry cover

open, be sure to turn OFF the power of the system at the
distribution board and wait for five minutes or more to
prevent workers from receiving electric shocks or being
injured due to unexpected system operations.

2. If it is necessary to perform servicing with the system

turned ON, supply power only to the required parts. At the
same time, take safety measures such as turning OFF the
power of the cover switch and NFB120 (power to the
rotation servo motor).

3. Hazardous voltage in the LCSR (slipring section) and brush

section will cause electric shock. Do not remove the rear
dome cover. If it is necessary to remove the rear dome
cover, turn OFF the breaker before mounting/removing the
rear dome cover.
Do not turn ON the power of the gantry when the rear dome
cover is removed.

4. When it is necessary to touch the slipring or brushes (for

example, to clean the slipring or to replace the slipring
brushes), turn OFF all the breakers on the distribution
board in advance. Otherwise, an electric shock will result.

WARNING: 1. After opening the gantry front cover, support the cover
with two supporting poles to the rear of the cover. Use
the supporting poles correctly.
If the supporting poles are used incorrectly or the cover
is lifted inadvertently, the supporting poles may fall
causing the cover to close suddenly due to its weight,
resulting in injury.

2. If a part of the rotation section of gantry is to be removed,

be sure to engage the rotation lock pin of the rotation
drive section. Otherwise, the rotation section may rotate
suddenly due to the weight imbalance caused by removal
of the part, and a worker may get caught in the rotation
section and be seriously injured as a result. Hold the
rotation section firmly when pulling out the rotation lock
pin.

3. Be sure to clean the slipring section of this system every

three months.
If abraded materials from the brush accumulate, they may
generate smoke or catch fire.

No. 2D201-102EN*B
20
 CAUTION: 1. Do not modify or repair the system without permission.
Failure to do so may result in system malfunction or
incorrect system operation.

2. When tilting the gantry, never place your foot on the stand
base cover. Your foot may be caught, resulting in injury.

CAUTION: 1. When cleaning or disinfecting the system, take care not to damage the
system.

* Use only the specified disinfectants and lubricants in the specified

manner and frequency. Failure to do so may result in discoloration
or cracking of the surface finish, or in damage to rubber or plastic
parts.

* Do not clean the unit with organic solvents (such as paint thinner) or
abrasive cleansers because they may cause damage or
discoloration.

2. If the 2.0-MHU X-ray tube is installed in the system, do not perform

0.75-second rotation from the gantry maintenance panel.
Doing so may damage the X-ray tube.

No. 2D201-102EN*B
21
1.2 Configuration of Gantry

Gantry Stand unit Tilt drive unit

Tilt detection unit

Electrical components unit and terminals

Main frame unit Slipring unit

Rotation drive unit

Electrical components unit

X-ray beam X-ray tube mounting unit

control unit
Wedge filter unit

Slit unit

Beam trimmer unit

Electrical components unit

Covers Resin cover section

Other cover sections

Operation sections

Display section

Safety switches

No. 2D201-102EN*B
22
1.3 Description of Function and Operation of Each Unit
1.3.1 Stand unit
The stand unit tilts the main frame unit relative to the vertical axis of the gantry in order
to scan an oblique section of the patient.
The tilt drive unit is located at the left of the gantry as viewed from the patient couch.
The main frame unit is tilted using the arm which is mounted on the main frame unit and
is driven by the power cylinder. The pillow block mounted to the base frame main unit
serves as the rotation shaft about which tilting is performed. An encoder is mounted on
the right of the stand in order to measure tilt angles.

Î Refer to figure 1.3-1.

The microswitch dog is mounted on the tilt detection unit on the right of the stand, and
the microswitches which turn OFF the power of the motor through the relays are
mounted on the arm. The encoder also sends instructions to the motor to stop tilting,
that is, a double safety function is employed.
Î Refer to figure 1.3-2.

The operation of the microswitch dog is shown in figure 1.3-2.

A gas spring is mounted on the right of the gantry in order to reduce the tilt drive torque.

Î Refer to figure 1.3-2.

The stand rear pipe is for mounting electrical parts.

Î Refer to figure 1.3-3.

No. 2D201-102EN*B
23
 Main frame unit

Arm

Power cylinder

Base frame
main unit
Patient-couch side

Stand unit

Figure 1.3-1 Stand unit (viewed from the patient couch)

No. 2D201-102EN*B
24
 Pillow block
Encoder
Encoder mounting plate

Gear (small)
Tilt
detection Gear (large) Microswitch
unit
Microswitch dog
(+ tilt side)

Microswitch dog (- tilt side)

Gas spring

Figure 1.3-2 Movement of the tilt detection section

No. 2D201-102EN*B
25
 Stand rear pipe

Stand unit electrical parts

Figure 1.3-3 Stand unit (rear)

No. 2D201-102EN*B
26
1.3.2 Main frame unit
The main frame unit consists of the slipring unit, the optical data transfer unit, the
control unit, and the rotation drive unit. This unit rotates the gantry, and signals and
power are transmitted/received between the rotation section and the stationary section.

1.3.2.1 Slipring unit

The slipring unit supplies power to the X-ray high-voltage generator, etc. of the rotation
section.

The pulley and the rotation base are supported by the main frame through bearings and
can be rotated freely. The X-ray tube, X-ray high-voltage generator, and the X-ray
optical section are mounted on the rotation base. The slipring is fixed to the pulley.
Power is supplied from the brush section mounted on the back of the main frame unit to
the X-ray high-voltage generator through the slipring unit. The figure below shows the
outline drawing of the slipring unit.

Rotation base

Pulley

1 ch 4 ch

Bearing

Main frame

Figure 1.3-4

The relationship between each slipring channel and the voltage is shown in the table
below.

RING ch FUNC
RING 1 200 VAC
RING 2 200 VAC
RING 3 200 VAC
RING 4 GND

No. 2D201-102EN*B
27
 X-ray tube

Oil cooler

Control unit
Rotation
servo unit

Rotation base
X-ray
high-voltage
generator Optical unit

Main frame
Detector

Rotation
drive unit

Main frame unit (front)

Power unit

Optical data
transfer unit

Brush sections
Slipring section

Main frame
Large pulley
Timing belt

Small pulley

Main frame unit (rear)

Figure 1.3-5

No. 2D201-102EN*B
28
1.3.2.2 Rotation drive unit
The rotation drive unit rotates the gantry rotation section at maximum speed 0.75
rotation per second. This unit comprises the motor, the small pulley, the timing belt, the
large pulley, and the timing belt-tension adjustment fitting. The outline drawing is shown
in figure 1.3-6.

The rotation torque generated by the motor located at the lower left of the gantry front is
transmitted from the small pulley directly connected to the motor to the large pulley
through the timing belt to rotate the rotation section.

The tension of the timing belt can be adjusted as described below:

Secure the motor to the tension adjustment fitting.

The mechanical rotation stoppers are mounted to prevent rotation of the rotation section
during replacement of heavy components mounted to the rotation section.

WARNING: If a part of the rotation section of gantry is to be removed, be

sure to engage the rotation lock pin of the rotation drive
section. Otherwise, the rotation section may rotate suddenly
due to the weight imbalance caused by removal of the part,
and a worker may get caught in the rotation section and be
seriously injured as a result. Hold the rotation section firmly
when pulling out the rotation lock pin.

Tension adjustment bolt

Main frame

Timing belt

Mechanical stopper/tension
adjustment bracket Motor
Rotation mechanical
stopper bolt

Small pulley

Figure 1.3-6 Rotation drive unit

No. 2D201-102EN*B
29
1.3.3 X-ray beam control unit
The function of the X-ray beam control unit is to control the dose and quality of X-rays
generated from the X-ray tube. The unit includes the wedge filter for limiting X-rays to
the appropriate level before they reach the patient, and the slit unit for setting the slice
thickness of the patient. The wedge filter unit and the slit unit are incorporated into one
housing.
The beam trimmer also is mounted to control the slice thickness of the patient with the
slit unit.
In addition to the X-ray beam control unit, the X-ray tube, the oil cooler, the reference
detector, the side, slant, and median-line projectors, the X-ray beam control mechanism
control unit, the main-detector array, the DAS and the DAS power supply are also
mounted on the front of the rotation base of the gantry, and are rotated at high speed
together.

Median-line projector X-ray tube

Wedge

Oil cooler

Wedge
Slant Reference filter unit
projector detector
Slit unit
Slit

Side projector

Beam trimmer Beam

trimmer

X-ray beam control

mechanism control unit

Control system
power supply unit DAS
Acquisition system power
supply unit (rear)

Figure 1.3-7 Layout of the X-ray beam control unit

No. 2D201-102EN*B
30
 Optical system
(slit, wedge filter)

Shield cover

Figure 1.3-8 Wedge filter and slit units

Figure 1.3-9 Beam trimmer unit

No. 2D201-102EN*B
31
1.3.3.1 X-ray tube mounting unit
The X-ray tube is mounted on a stage that can be moved in the X and Y directions for
positional adjustment. The X-ray tube is fixed with four bolts and also with
reinforcement brackets or belts to ensure safety if the bolts fail.

Reinforcement bracket

X-ray tube

Adjustment screws

Adjustment screws Collimator

Longitudinal
adjustment guide

Figure 1.3-10 X-ray tube mounting unit

In addition, the collimator (see figure 1.3-10) is mounted at the bottom of the X-ray tube
so that generated X-rays are converted to appropriate fan beams to eliminate scatter
lines and penumbra effects.

The collimator is made of lead and is designed so that fan beams from the collimator
have the correct angle. Take extreme care not to damage this part because it limits the
X-ray beam. The reference detetor is attached to the port which is tilted relative to the
vertical shaft.

No. 2D201-102EN*B
32
1.3.3.2 Wedge filter unit
(1) Wedge filter movement

The wedge filter unit is placed between the patient and the X-ray tube to limit the
X-rays which pass through the patient, so that excessive exposure does not
interfere with processing. Four different types of wedge filters; one for normal
scanning regions, one for pediatric examinations, one for large scanning regions,
and one for specially reducing the exposure dose; are used because transmitted
X-rays differ depending on the scanning region and size of the patient.
The wedge filter movement motor is a stepping motor. This motor rotates to set
the appropriate filter position when it receives the appropriate number of pulses.
The wedge drive section incorporates a photosensor for origin detection. The
wedge filters return to the origin and move to the preset position each time an
instruction is received in order to avoid cumulative positioning errors.

(2) Motor rotation and wedge filter movement direction

When the motor rotates clockwise, the movement is in the direction from the origin
point to WEDGE LL, SCANO. When it rotates counterclockwise, the movement is
in the direction from WEDGE LL, SCANO to the origin point.

No. 2D201-102EN*B
33
 Slit plates

Wedge drive
motor

Small wedge filter

Slit drive motor

Normal wedge filter

Large wedge filter

Air calibration
Wedge filter for
dose reduction

Figure 1.3-11 Slit unit and wedge filter unit

No. 2D201-102EN*B
34
1.3.3.3 Slit unit
(1) Slit movement

The slit unit controls the width of X-ray beams passing through the patient
according to the selected slice thickness.

Seven slice thicknesses are available: 0.8, 1, 2, 3, 5, 7, and 10 mm.

Because the slit unit cannot collimate the width of X-ray beams sufficiently for the
slice thicknesses 0.8 mm, 1 mm, and 2 mm, the beam trimmer is used to control
the width.

The specified slit is set on the X-ray beam path according to an instruction from the
console. The slit width is changed by rotating the link mechanism shaft using the
motor to move the slit plate.

Five slit widths are available, and they are set as listed in the table below.

Figure 1.3-12 Slit link mechanism

Table 1.3-1 Relationship between the preset slice

thickness and the slit width

Slice thickness Slit width

10 mm 3.85±0.3 mm
7 mm 2.50±0.2 mm
5 mm 1.79±0.1 mm
3 mm 1.20±0.1 mm
2 mm 0.90±0.1 mm
1, 0.8 mm 0.65±0.1 mm

The motor for slit movement is a stepping motor. This motor rotates to set the
appropriate slit when it receives the required number of pulses. The slit unit is
equipped with an origin detection photosensor. When an instruction is received,
the slit plates are returned to the original positions and then are opened or closed
to the appropriate positions. This avoids cumulative positioning errors.

(2) Motor rotation and slit movement direction

Clockwise motor rotation makes slit width narrower and counterclockwise motor
rotation makes slit width wider.

No. 2D201-102EN*B
35
1.3.3.4 Beam trimmer unit
(1) Beam trimmer movement

The beam trimmer is located just in front of the main-detector array to control the
width of the X-ray beam passing through the patient according to the selected slice
thickness, as does the slit unit.

The trimmer movement motor is a stepping motor. This motor rotates to set the
appropriate slit when it receives the required number of pulses.

The drive unit is equipped with an origin detection photosensor. When an

instruction is received, the trimmer plates are returned to the original positions and
then are moved to the appropriate positions. This avoids cumulative positioning
errors.

Figure 1.3-13 Beam trimmer unit

No. 2D201-102EN*B
36
(2) Motor rotation and blade movement direction

The relationship between motor rotation direction and blade movement direction is
opposite between the right and left motors.

When the right motor rotates clockwise (viewing from the motor axis), the blades
are moved closer. When it rotates counterclockwise, the blades are opened wider.
For the left motor, the above relationship is opposite.

The clearances between the blades are shown below:

Table 1.3-2

Slice width Blade clearance

OPEN (10 mm) 23.2 to 24.2 mm
7 mm 13.5 to 14.5 mm
5 mm 9.5 to 10.5 mm
3 mm 5.9 to 6.9 mm
2 mm 3.85 to 4.85 mm
1 mm 1.65 to 2.45 mm
0.8 mm 1.23 to 2.03 mm

CAUTION: Never place your fingers between the blades, or the fingers
will be caught.

No. 2D201-102EN*B
37
1.4 Troubleshooting and Repair
Maintenance personnel for the system must fully comprehend the normal operation of
the system for quick and accurate troubleshooting and repair. Analyze symptoms and
troubleshoot according to the related troubleshooting flowcharts provided on the
following pages, then take appropriate repair actions (including replacements and
adjustments).

When troubleshooting is unsuccessful, report the details of the symptoms and the
maintenance procedures taken to Toshiba Engineering personnel in charge.

Example 1: Generation of abnormal sounds

1) Locate the source.

2) Characteristics of the sound (Record the sound on tape.)
3) Is there any periodic or positional relationship between the abnormal
sound and system operations?

Example 2: Oil leakage

1) Locate the source.

2) Photographically record the oil leak.
3) Check and record the environmental (temperature) conditions.

Troubleshooting and repair

Tilt section Î See subsection 1.4.1.

Rotation section Î See subsection 1.4.2.

Slipring section Î See subsection 1.4.3.

Slit section Î See subsection 1.4.4.

Wedge section Î See subsection 1.4.5.

Beam trimmer section Î See subsection 1.4.6.

No. 2D201-102EN*B
38
 1.4.1 Troubleshooting and repair of the tilt section
Malfunction Check Probable cause Countermeasures

Tilting disabled The motor rotates. Damaged parts in the power Replace the power cylinder.
cylinder

Microswitch operation Reset the microswitch.

Connector disconnection Connect the connector.

The motor does not rotate. Damaged motor Replace the power cylinder.
No. 2D201-102EN*B

Transportation jig still mounted Remove the transportation jig.

Damaged cable Replace the cable.

39

Abnormal noise Generated from the tilt drive unit Faulty solenoid brake Replace the power cylinder.
during tilt
operation Insufficient lubrication of the Replace the power cylinder.
inside power cylinder

External noises Cover interference Firmly seat the cover.

Generated from the pillow block Damaged pillow block or Call the Toshiba engineering
unit insufficient lubrication personnel in charge.

Generated from gas spring Broken gas spring Replace gas spring.
 1.4.2 Troubleshooting and repair of the rotation section
Malfunction Check Probable cause Countermeasures

The rotation The motor rotates. Broken belt Replace the belt.
drive section
does not rotate. The motor does not rotate. Damaged motor Replace the motor.
(It can be rotated manually after
the brake is released.) Damaged servo amplifier Replace the servo amplifier.

Connector looseness Fasten the connector firmly.

(Motor, encoder, servo pack,
KGTSM)
No. 2D201-102EN*B

The motor does not rotate. Worn-out or broken bearing Call the Toshiba engineering
(It cannot be rotated manually (Main bearing) personnel in charge.
even after the brake is released.)
Attachments interfere with the Remove or adjust the
40

frame attachments.

The rotation stopper has been Remove the stopper.

attached.

Damaged cable Replace the cable.

 Malfunction Check Probable cause Countermeasures

Abnormal sounds Contact with the cover Fix and adjust the cover.
when the rotation
drive section rotates Cables touching a stationary Repair and reclamp the cables.
section

Noises from the motor Damaged motor Replace the motor.

Noises from the belt Uneven contact between the Apply powder to the belt.
belt and the groove in the pulley

Loose screws for parts of the Tighten the screw firmly.

No. 2D201-102EN*B

rotation unit

Noises from the bearing Bearing abnormality Call the Toshiba engineering
41

personnel in charge.

Uneven rotation Rotation timing belt tension Improper belt tension Adjust the tension of the timing
of the rotation belt according to the manual.
section

Check the rotation balance. Unbalanced rotation Adjust the tension of the timing
belt according to the manual.

Torque Too much bearing torque Call the Toshiba engineering

personnel in charge.

The overload relay Torque Same as above Same as above

of the rotation servo
unit is activated.
 Malfunction Check Probable cause Countermeasures

Abnormal sounds Foreign object in the gantry Remove the object from the gantry.
when the gantry
rotates

Rotation section Loose mounting screws of the Tighten the screws.

rotation unit

Loose motor mounting screw

Interfering cable Repair the cable and fix it with cable

ties.
No. 2D201-102EN*B

Insufficient lubrication of the Call the Toshiba engineering

rotation bearing personnel in charge.
42

Improper timing belt tension Adjust the tension of the timing belt.

Electronic parts cover, etc. Rattling cover Seat the cover firmly.

Gantry covers Rattling cover

Ring of slipring unit Scratches on the ring surface Repair them according to the manual.

Brush movement Brush movement problem Clean the brushes according to the
(The brush is caught, for manual.
example.)

A brush that is worn beyond the Replace the brush.

abrasion limit is being used.
 1.4.3 Troubleshooting and repair of the slipring section
Malfunction Check Probable cause Countermeasures

Brushes worn Sliding surfaces of the slipring Abrasion by flaws or adhered Remove them using a piece of
abnormally and brushes abraded powder on the ring sandpaper.

Brush holder mounting section Loose brush holder mounting Tighten the screw firmly.
screws

Brush holder section Brush movement problem Clean off the brush holder section.

Excessive noise Sliding surface of the brushes of Flaw on the ring Sandpaper the ring.
No. 2D201-102EN*B

the slipring

Foreign object on the brush Clean the brush surfaces.

43

surface

Brush Damaged brush Replace the brush.

Badly pitted or worn-out brush Check the sliding surface of the

brush and replace it if it is badly
pitted or worn out.

Brush movement problem Clean off the brush and file it.

Brush holder Loose brush holder mounting Tighten the screws firmly.
screws

Loose brush mounting screws Tighten the screws firmly.

 Malfunction Check Probable cause Countermeasures

Discharge between Brush holder and ring spacer Reduction of dielectric strength When discharge is detected, call the
phases and between due to brush powder or metallic Toshiba engineering personnel in
each phase and GND objects on the insulating ring charge.
When metallic residue or the other
conductive materials are found on
the insulating ring, clean them off.

Ring surface Interference with objects such Remove traces of discharge using a
as a screw piece of sandpaper and check that
no screws have fallen out.
No. 2D201-102EN*B
44
 1.4.4 Troubleshooting and repair of the wedge section
Malfunction Check Probable cause Countermeasures

The wedge section The motor does not rotate. Incorrect wiring or disconnection Check the power cable.
does not operate. Connect the cable firmly.

Object jammed in the torque Remove the object.

transmission system

Locked at the stroke end due to Replace the sensor.

damaged origin sensor

Damaged motor Replace the motor.

No. 2D201-102EN*B

The motor rotates. Loose pinion cap screw Tighten the pinion cap screws.

Damaged pinion Replace the pinion.

45

Abnormal noises The whole unit Foreign objects in the unit Remove the objects.

Faulty motor operation Incorrect wiring or disconnection Wire correctly and firmly.

Unstable wedge block Large backlash of the pinion Adjust the motor position.
& rack

Loose wedge fixing bolts Tighten the bolts firmly.

 1.4.5 Troubleshooting and repair of the slit section
Malfunction Check Probable cause Countermeasures

The slit section does The motor does not rotate. Damaged worm wheel Replace the worm wheel.
not operate.

Damaged motor Replace the motor.

Incorrect wiring or disconnection Wire correctly and firmly.

Rust or insufficient lubricant Grease the rotating parts.

The slit does not return. Incorrect wiring of the origin point Correct the problem.
No. 2D201-102EN*B

sensor or disconnection

Damaged origin sensor Replace and adjust the sensor.

46

The motor rotates. Loose worm wheel setscrews Tighten the screws firmly.

Loose worm setscrews Tighten the setscrews firmly.

Abnormal noise from Normal slit section operation Broken blade spring Replace the spring.
slit section

Loose blade nuts Tighten the nuts firmly.

 1.4.6 Troubleshooting and repair of the beam trimmer section
Malfunction Check Probable cause Countermeasures

Unmovable blades The motor rotates. Connector pin has fallen out. Insert the connector pin.

Damaged motor Replace the motor.

Damaged chain Replace the chain.

Locked at the stroke end due to Replace the sensor.

broken origin sensor

Improper blade installation and Mount the blades correctly

resulting overload and adjust their movement.
No. 2D201-102EN*B

The motor rotates. Loose sprocket setscrew Tighten the setscrew firmly.

Damaged chain Replace chain.

47

Abnormal noises Motor mounting screws Loose motor-mounting screw Tighten the screws firmly.
from the beam
trimmer section
Faulty motor operation Incorrect wiring or disconnection Wire correctly and firmly.

Chain tension Improper chain tension Adjust the chain tension.

Asynchronous left Left and right drive system Operation failure of either drive Adjust so that the blades move
and right blade operation system with opposite sides parallel.
movements
("n"-shaped Origin point sensor plate Deformation of origin point sensor Re-adjust the sensor position.
blade movement) plate
1.5 Maintenance Sections and Cover Opening/Closing
This subsection describes sections of the TSX-021B scanner that require maintenance
and the covers which must be removed to reach these sections. See table 1.5-1 and
figure 1.5-1. (An uppercase letter in figure 1.5-1 is used to identify a cover.)

For the procedures for opening/closing each cover, refer to subsections 1.5.1 to 1.5.5.

WARNING: Firmly engage the support bar

when opening the front cover. Firmly engage the
support bar when
If it is not firmly inserted, the opening the front
cover.
support bar may fall and the If it is not
firmly inserted,
cover may close suddenly, the support bar
may fall and the
possibly resulting in personal cover may close
suddenly, possibly
injury. resulting in
personal injury.

Table 1.5-1

Maintenance section A B C D E F G H I
Replacement and { {
alignment of the X-ray
[B]: Side tube
Mylar ring
cover Detector {
[A]: Front [C]: KGTSM
inspection DAS (power supply to {
cover
window PWBs)
Optical system check {

Front under cover R-servo pack {

R-motor { {
Belt tension { {
check/adjustment
[E]: Top cover
Maintenance of the tilt {
motor
KGTSM local operation {
KGTSM-PC board {
[I] Rear cover
[D]: Side HFG check and { {
(right)
cover adjustment
[F]: Rear dome
cover (left) Tube top sensor { {
[H]: Rear cover MUDAT check and { {
Stand cover
(left)
(right) cleaning
[G]:
Rotation LC slipring/brushes { { { {
mechanical cleaning
Stand cover stopper
Beam trimmer {
(left) inspection
Rear cable cover window

Figure 1.5-1

No. 2D201-102EN*B
48
1.5.1 Procedures for removing/mounting the Mylar ring

Front cover
Joint

Dome cover

Mylar ring

Figure1.5-2 View with Mylar ring removed

1.5.1.1 Removal procedure

Remove the two M4 screws from the joint section of the Mylar sheet.
45 °

Figure viewed from the patient couch

Figure 1.5-3

No. 2D201-102EN*B
49
1.5.1.2 Mounting procedure

Slot side

45 °
Cushion/
notch side

Dome

Be careful of the orientation

of the overlapped Mylar sheet.

Figure viewed from the patient couch

Figure 1.5-4

No. 2D201-102EN*B
50
<Work procedure>

(1) Arrange the Mylar sheet so that it hangs as shown in figure 1.5-4, overlap the ends
of the Mylar sheet, and tighten them using M4 screws.

(2) Press the hanging section against the cover and, using the scales as shown in
figure 1.5-5, confirm that the Mylar sheet is in close contact with the dome within
the range of ±100 mm at the bottom of the dome (d≤4.0 mm).

A Dome, Mylar sheet

Scales

(Length along the arc) Front cover Dome cover

200

d
Mylar sheet
A-A

Figure 1.5-5

(3) If there is a gap between the dome and the Mylar sheet, restore the Mylar sheet to
the status shown in figure 1.5-4 by hooking the Mylar sheet using the scale or a
bladed screwdriver. Then, loosen the M4 screws, pull out the Mylar sheet at the
slot side to adjust the Mylar sheet diameter, and tighten the M4 screws.

(4) Perform the confirmation in (2) again. When the Mylar sheet is in contact with the
dome, this work is completed.

CAUTION: Mount the Mylar ring securely.

If the Mylar sheet is not in contact with the cover, fluids such as
blood, contrast medium, etc. may leak into the system through
the gap between the Mylar sheet and the cover, resulting in
damage to the system or deterioration of image quality.

No. 2D201-102EN*B
51
1.5.2 Opening/closing the front cover
<Work procedure>

(1) Move the couch to the DOWN limit position.

(2) Remove the front under cover.

Washer
1-M4
2-M4
Cap
2-M4
(left and right)

Figure 1.5-6

(3) Remove the Mylar ring.

(4) Remove the fixing screws from the under part of the front cover and the side cover.

(5) Pull up the front cover, pull the front under portion with hands.

No. 2D201-102EN*B
52
 (6) Remove the supporting pipe from the front cover at the left. (Figure 1.5-7)

Front cover

Supporting
pipe

Supporting
This part is hidden by pipe
the side cover.

Square hole

Figure 1.5-7

(7) Insert the supporting pipe into the square hole.

(8) Remove the supporting pipe from the front cover at the right.

(9) Insert the supporting pipe into the square hole.

The closing procedure is the reverse of the opening procedure described above.

WARNING: The supporting pipe must be

inserted in the square hole Firmly engage the
support bar when
securely. If the supporting pipe opening the front
cover.
is not inserted securely, the If it is not
firmly inserted,
front cover may fall or close the support bar
may fall and the
suddenly, possibly resulting in cover may close
suddenly, possibly
injury. resulting in
personal injury.

CAUTION: When the gantry is to be tilted with the front cover open, be extremely
careful not to allow the front cover to come into contact with the ceiling or
the patient couch. Otherwise, the system may be damaged.

No. 2D201-102EN*B
53
Ceiling

30 o 30 o

Figure 1.5-8

No. 2D201-102EN*B
54
1.5.3 Removing/mounting the side cover
<Work procedure>

(1) Remove the screws (right: three screws, left: three screws) from the side and top of
the side cover.

(2) Lift the side cover while sliding it towards the rear and remove it.

The mounting procedure is the reverse of the removing procedure described above.

KGTS maintenance 2-M4

cover
Side cover (right)

2-M4
1-M4

Side cover (left)

Sliding
direction

1-M4

Figure 1.5-9

No. 2D201-102EN*B
55
1.5.4 Removing/mounting the rear-upper cover
<Work procedure>

(1) Remove the screws from the rear and the side of the lower section. (At this time,
the M4 screws at the locations marked with * in figure 1.5-10 (2 locations) must be
tightened together with the left and right covers.)

(2) Remove this cover while lifting it slightly. (The rear cover is placed on the hook
plate.)

The mounting procedure is the reverse of the removing procedure described above.

Note that the left and right rear covers can be mounted/removed independently.

Rear cover (right)

2-M4* Rear cover

hook plate

Rear cover (left)

1-M4
2-M4 The M4 screws marked * are
tightened together with the rear
covers (left and right).

Figure 1.5-10

No. 2D201-102EN*B
56
1.5.5 Removing/mounting the dome cover

DANGER: Turn OFF all the breakers on

the distribution board before Turn OFF all the
removing the dome cover. High breakers on the
distribution board
voltage in the slipring and the before removing
the dome cover.
brushes may cause electric High voltage in the
shock. slipring and the
brushes may cause
electric shock.

<Work procedure>

(1) Turn OFF the breakers on the distribution board (this shuts down power supply to
the slipring unit).

(2) According to subsection 1.5.4, remove the left and right rear covers.

(3) Disconnect the five connectors of the two mat switches, the tape switch, the patient
guide, and the microphone located at the upper left of this cover and remove the
cable clamp.

(4) Remove the four M4 mounting screws to remove this cover.

The mounting procedure is the reverse of the removing procedure described above.

(Before removing this dome

cover, disconnect the five
connectors located on the left
of the dome cover.)

Connector

4-M4

Figure 1.5-11

No. 2D201-102EN*B
57
1.5.6 Removing/mounting the top cover
<Work procedure>

(1) Remove the M4 screws (4 locations) referring to the following figure.

(2) Remove the top cover in the upward direction.

The mounting procedure is the reverse of the removal procedure described above.

4-M4 Top cover

Figure 1.5-12

No. 2D201-102EN*B
58
1.5.7 Method for manually tilting the gantry in the case of malfunction
<Tools and parts required>

(1) Standard tools : 1 set

(2) Socket wrench (10 mm) : 1 set

<Work procedures>

(1) Remove the left and right side covers.

(2) Remove all base covers.

(3) Use the socket wrench or impact wrench to rotate the motor output shaft nut
(10 mm) of the power cylinder. The power cylinder will expand/contract, resulting
in gantry tilting. Refer to the figure below.

(4) Remount all covers.

Power cylinder motor

output shaft nut

Figure 1.5-13 Power cylinder motor output shaft nut

No. 2D201-102EN*B
59
1.6 Replacing Each Component
1.6.1 Replacing the projector lamp
All the projectors are mounted to the rotation section and can be replaced
independently.

The pattern direction of the beam from each projector is described in figure 1.6-1.

WARNING: The system employs a laser beam device. Do not look

directly into the laser beam, as doing so could injure your
eyes.

Left-side projector Median-line projector

Pattern direction: Axial
Pattern direction: Slice plane
Slant projector
Pattern direction: Slice plane

Right-side projector

Pattern direction: Pattern direction:

Axial Axial

Pattern direction:
Slice plane

Figure 1.6-1

No. 2D201-102EN*B
60
1.6.2 Tilt drive unit maintenance

1.6.2.1 Lubricating the tilt detection unit

<Tools and parts required>

(1) Standard tools : 1 set

(2) Grease (Nichimori L grease) : Adequate amount

(3) Bar (for applying grease) : 1

(4) Rags : Adequate amount

<Work procedure>

CAUTION: When tilting the gantry, never

place your foot on the stand When tilting the
base cover. Your foot may be gantry, do not
place your foot
caught, resulting in injury. on this cover.
Your foot may be
caught, resulting
in personal injury.

(1) Set the tilt to 0° and remove the right side cover.

(2) Apply grease to the encoder gear section of the tilt detection unit.

(3) After applying grease, remount the right side cover and tilt the gantry several times
to spread the grease evenly.

Pillow block
Encoder
Gas spring

Encoder mounting plate

Gear (small)
Tilt
detection Gear (large)
unit
Microswitch dog
(+ tilt side)

Microswitch dog (- tilt side)

Microswitch

Figure 1.6-2 Tilt detection unit

No. 2D201-102EN*B
61
1.6.2.2 Replacing the power cylinder
<Tools and parts>

(1) Standard tools : 1 set

(2) Torque wrench (250 kgf⋅cm) : 1

(3) Torque wrench (45 kgf⋅cm) : 1

(4) Yellow paint pen : 1

<Work procedure>

(1) Set the tilt to 0°

• Although the power cylinder can be replaced at an angle other than the tilt 0°
position, attention must be paid when the cover is removed and remounted.

(2) Remove the left and right side covers.

(3) Remove the left and right rear covers.

(4) Remove the left and right stand covers.

(5) Mount the tilt lock metal fitting* to the right arm and the stand.

* Tilt lock metal fitting for transport which is removed at the time of installation
Î Refer to figure 1.6-3.

(6) Remove the anchor bolt of the left-side anchor section, the anchor-mounting metal
fitting, and the shaft-retaining metal fitting.

(7) Remove the shaft-retaining metal fitting of the power-cylinder upper bracket (M6, 2
locations).

*: Do not remove the shaft.

(8) Manually rotate the power cylinder motor output shaft to provide play in the power
cylinder shaft section.

Î Refer to the figure below

and to figure 1.6-5.

Play

(9) Disconnect the cables of the power cylinder.

No. 2D201-102EN*B
62
(10) Extract the shaft and remove the upper bracket.

(11) Extract the lower-end shaft and remove the power cylinder.

(12) Replace the bracket and manually rotate the rod of the new power cylinder to
adjust the length.

(13) Mount the new power cylinder.

The bracket mounting bolts (M8, 3 locations) must be tightened referring to figure
1.6-5. In addition, perform remounting work for the anchor section that was
removed in step (6).

(14) Connect the cable.

(15) Insert the shaft into the hole in bracket and rotate the motor output shaft so that
the shaft is in contact with the upper edge of the hole in the bracket.
(Refer to the figure below.)

The shaft must be in contact with the hole.

(16) Remount the shaft-retaining metal fitting of the power-cylinder bracket.

The metal fitting mounting bolts (M6, 2 locations) must be tightened referring to
figure 1.6-5.

(17) Remove the tilt lock metal fitting.

(18) Tilt the gantry several times to confirm that operation is normal.

(19) Remount the cover.

No. 2D201-102EN*B
63
(20) Set the tilt to ±30° again to confirm that there is no interference.

M16

Tilt-lock metal fitting

4-M12

Tilt-lock metal
M16 fitting

Figure 1.6-3 Tilt drive unit (right side of the gantry)

No. 2D201-102EN*B
64
 Bracket

Shaft

Shaft retaining
metal fitting

Dry bearing

Shaft
Shaft retaining
metal fitting

Figure 1.6-4 Tilt drive unit (left side of the gantry)

M8 (3 locations)
Tightening torque: 250 kgf cm
Yellow paint

M6 (2 locations)
Tightening torque: 45 kgf cm
Yellow paint

Power cylinder motor output shaft

Figure 1.6-5 Bracket section at the upper part of the power cylinder

No. 2D201-102EN*B
65
1.6.3 Replacing the X-ray tube

DANGER: Do not touch the tip of the

high-voltage cable.
Do not touch the
Residual charge may tip of the high-
cause an electric shock. voltage cable.
Residual charge
may cause an
electric shock.

WARNING: 1. If a part of the rotation

section of gantry is to
be removed, be sure to
engage the rotation Engage the mechanical
brake before removing
lock pin of the rotation a heavy component from
drive section. the rotation section.
Otherwise, the rotation Failure to do so will
section may rotate result in rotation of
the gantry due to the
suddenly due to the weight imbalance,
weight imbalance possibly resulting in
caused by removal of personal injury.
the part, and a worker
may get caught in the
rotation section and be
seriously injured as a
result. Hold the
rotation section firmly
when pulling out the
rotation lock pin.

2. After opening the

gantry front cover, WARNING
support the cover with
Firmly engage the
two supporting poles to support fitting when
the rear of the cover. opening the chassis.
Use the supporting If it is not firmly
poles correctly. engaged, the support
fitting may come off
If the supporting poles and the chassis may
are used incorrectly or close suddenly,
the cover is lifted possibly resulting in
inadvertently, the personal injury.
supporting poles may
fall causing the cover to
close suddenly due to
its weight, resulting in
injury.

No. 2D201-102EN*B
66
 <Tools and parts required>

(1) Phillips screwdrivers (Large and small) : 1 each

(2) Wrench set for hexagonal head bolts : 1 set

(3) Allen wrenches : 1 set

(4) Combination wire stripper : 1

(5) Cable ties and clamps

(Large, medium, and small) : 30 each

(6) Belt wrench : 1

(7) Tube replacement jig

(same as that for Xvision) (CLX-21141-1) : 1 set

(8) Ratchet-type chain block : Used to suspend the X-ray tube and
the oil cooler. Prepare one for 100 kg
to 250 kg.

(9) Torque wrench (350 kgf⋅cm) : 1

(10) Yellow paint pen : 1

No. 2D201-102EN*B
67
<Work procedure> (two persons required)

(1) Set the tilt to 0°.

(2) Move the couch to the DOWN-LIMIT position.

(3) Turn OFF the power of all the units.

(4) Remove the Mylar ring and open the front cover.

(5) Remove the right side cover.

(6) Open the KGTSM section and set the retaining metal fitting securely.

Engage the M4 screw with the

hole in the retaining metal fitting.

Retaining metal fitting

KGTSM section

Figure 1.6-6

(7) Remove the median line projector.

NOTE: Remove the projector with the plate engaged with the positioning pin for
easy remounting.

(8) Remove the cable fixing band and the cable clamp clamping the tube cable, the oil
cooler cable, and the oil hose.

No. 2D201-102EN*B
68
 (9) Remove the high-voltage cable from the tube.

DANGER: When disconnecting the high-voltage cable, observe the

following to fully discharge its residual charge in order to
ensure safety during servicing work.
• Turn power OFF and wait five minutes or more.
• When the high-voltage cable has been disconnected,
simultaneously ground two of the three pins at the top
of the bushing in all three combinations. Repeat all
combinations twice or more.
• Do not touch the top of the bushing.
• Place a cap, vinyl cover, etc. over the tip of the
bushing to protect it.

(10) Mount the tube replacement jig.

(11) Remove four M12 bolts of the tube mounting plate.

CAUTION: Be careful about the tube because the tube may move
longitudinally during this work.

(12) Supply power to only the gantry stationary unit.

WARNING: Never turn ON breaker NFB2 of the rotation unit.

(13) Turn OFF rotation servo protector CP320.

(14) Release the rotation motor brake.

CAUTION: Hold the rotation section with hands because it may rotate due
to weight imbalance.

(15) Slowly rotate the rotation section manually to position the tube under the tube
replacement jig.

(16) Use the wire of the replacement jig to lift the X-ray tube.

CAUTION: Make sure that the wire and the chain block are not damaged.

(17) Engage the mechanical stopper and restore the rotation brake.

CAUTION: Insert the bolt of the mechanical stopper into the hole securely
and tighten the nut to prevent looseness.

No. 2D201-102EN*B
69
(18) Pull out the tube slowly.

NOTE: Hold the tube securely to prevent it from swinging when the mounting plate is
pulled out from the guide.

(19) After locking the jig brake, slowly lower the tube using the chain block.

(20) Remove the oil cooler mounting screws from the oil cooler mounting plate.

NOTE: Hold the oil cooler firmly to prevent it from swinging when the bolt is removed.

(21) Pull out the oil cooler section and lower it to the floor.

(22) Remove the tube reinforcement plate.

(23) Remove the tube mounting bolts.

(24) Mount the tube mounting plate set to a new tube.

No. 2D201-102EN*B
70
(25) Remount the components to the rotation base, in the order of the oil cooler, the
tube, etc., by reversing the steps from (1) to (24).

At this time, the mounting screws must be tightened with the torque specified in
figures 1.6-7.

Reinforcement bracket

X-ray tube

Adjustment screws

Collimator
Adjustment screws

Longitudinal
adjustment guide

Figure 1.6-7 X-ray tube mounting unit

No. 2D201-102EN*B
71
 X-ray tube

Section A Section B

Fix the X-ray tube using the lateral

adjustment guide so that there are
no gaps at section A or section B.
Base Position the X-ray tube downward
Lateral during this procedure.
adjustment guide

Section A: X-ray tube and base

Section B: X-ray tube and lateral adjustment guide

Figure 1.6-8 Lateral adjustment guide

No. 2D201-102EN*B
72
 Oil hose mounting bracket
Oil cooler mounting bracket

Oil cooler section

Cooler mounting plate

Rubber dampers
(10 pieces)

Oil cooler

Figure 1.6-9 Oil cooler and mounting plate

No. 2D201-102EN*B
73
1.6.4 Replacement of the large-current slipring brushes

DANGER: Be sure to turn OFF all the

breakers on the distribution
Turn OFF all the
board if it is necessary to touch breakers on the
distribution board
the slipring or brushes. before removing
High voltage in the slipring and the dome cover.
High voltage in the
the brushes may cause electric slipring and the
brushes may cause
shock. electric shock.

CAUTION: When cleaning the slipring brush, observe the following precautions.

* If burrs are found on the brushes, remove them using a cutter. Never
use sandpaper to remove burrs from the brushes. If grains from the
sandpaper enter the brushes, abnormal wear of the brushes may
result.

* When removing the cover, be careful not to apply a force to the ring or
to damage it.

* Be careful handling the brushes because they are fragile.

Remove only the burrs of the brushes using a cutter.

* Take care not to allow abraded material (powder) to fall in the gantry.

* When mounting the brushes, position them at the center of the ring.

* Verify that the cable is connected correctly.

NOTE: Before starting work, thoroughly ventilate the work area and take protective
measures such as wearing a protective mask.

The sliprings employ carbon brushes containing metal elements, and abraded
brush material will therefore be generated.

<Tools and parts required>

(1) Standard tools : 1 set

(2) Low-voltage slipring brushes : 1 set: BX77-2758 Gr. 1

(holders: 1 set)

(3) Rag : 1

(4) Large-current slipring brushes : Required number:

4X77-93417

(5) Scale (150 mm) : 1

(6) Cleaner

(7) Cutter

No. 2D201-102EN*B
74
<Work flow>

Remove the Mylar ring, the left

and right rear covers, and the DANGER: Be sure to turn OFF the
dome cover. power of the distribution
board before this work.

Disconnect the brush holder cable

terminal and remove the brush
holder.

Check for abrasion of the brush.

No. 2D201-102EN*B
75
 NO Is the brush
worn more than 2 mm
in length?*

YES
Replace the brush. * Check for abrasion at two locations of
the brush. Brush replacement must be
performed if the brush is worn more
than 2 mm in length* at both locations.

Clean the brush

holder and the Contact surface
brush sliding 1 mm
surface.
1 mm Brush

Limit line

* When the brush is worn more than

2 mm in length, the length between the
limit line and the contact surface of the
brush is 1 mm or less. (Measure the
length using a scale.)

Mount the brush holder to the bracket. CAUTION: The brush holder must be
mounted so that the brush
sliding surface does not
extend beyond the ring.
END

Burr

Limit line

Figure 1.6-10

No. 2D201-102EN*B
76
1.6.5 Replacing the gas spring
<Tools required>

(1) Plastic hammer : 1

(2) Standard tools : 1 set

<Work procedure>

(1) Remove the right rear cover and the right side cover (KGTSM side) and tilt the
gantry to the -30° position (figure 1.6-11).

(2) Loosen the fixing bolts (3-M8) of the gas spring lower section mounting plate.

(3) Loosen the push-pull bolt to move the mounting plate until it reaches the lowest
position (figure 1.6-12).

(4) After confirming that the gas spring is completely extended, remove the shaft by
extracting the pin and remove the gas spring.

(5) Mount the new gas spring.

(6) Fasten the push-pull bolt until the mounting plate reaches the highest position and
then tighten the fixing bolts.

(7) Tilt the gantry from the +30° position to the -30° position to confirm that operation is
normal.

Gas spring

Push-pull bolt
Mounting plate
3 M8 fixing bolts

Figure 1.6-12

Figure 1.6-11

No. 2D201-102EN*B
77
1.6.6 Replacing the 42-kW HFG (CXXG-010A)

WARNING: 1. If a part of the rotation

section of gantry is to be
removed, be sure to
engage the rotation lock Engage the mechanical
pin of the rotation drive brake before removing
a heavy component from
section. Otherwise, the the rotation section.
rotation section may Failure to do so will
rotate suddenly due to result in rotation of
the gantry due to the
the weight imbalance weight imbalance,
caused by removal of the possibly resulting in
part, and a worker may personal injury.
get caught in the rotation
section and be seriously
injured as a result. Hold
the rotation section
firmly when pulling out
the rotation lock pin.

2. After opening the gantry

front cover, support the WARNING
cover with two
Firmly engage the
supporting poles to the support fitting when
rear of the cover. Use opening the chassis.
the supporting poles If it is not firmly
engaged, the support
correctly. fitting may come off
If the supporting poles and the chassis may
are used incorrectly or close suddenly,
the cover is lifted possibly resulting in
personal injury.
inadvertently, the
supporting poles may fall
causing the cover to
close suddenly due to its
weight, resulting in
injury.

No. 2D201-102EN*B
78
1.6.6.1 Replacing the AC/CONTROL chassis
<Tools required>

(1) Torque wrench (34.3 N⋅m (350 kgf⋅cm)) : 1

(9.8 N⋅m (100 kgf⋅cm))

(2) Yellow paint pen : 1

(3) Standard tools : 1 set

<Work procedure>

(1) Turn OFF the gantry rotation section breaker (NFB2). If only the rotation section
can be turned OFF at the distribution board, also turn OFF the breaker on the
distribution board for the rotation section power supply.

(2) Turn OFF the power of the gantry using CP1 and open the side cover near the
KGTSM and the front cover.

(3) Open the KGTSM section and set the retaining metal fitting securely.

Engage the M4
screw with the
hole in the
retaining metal
fitting.
Retaining metal fitting

KGTSM section

Figure 1.6-13

(4) Turn OFF servo protector CP320 and turn ON gantry power supply CP1 only.

(5) Release the rotation brake, slowly rotate the CONVERTER chassis manually to a
location underneath the X-ray tube replacement jig, and turn OFF gantry power
supply CP1 after locking the mechanical stopper.

(6) Disconnect the three cables and the ground cable from the AC/CONTROL power
input section.

No. 2D201-102EN*B
79
 (7) Remove the cap from the front of the AC/CONTROL chassis and disconnect the
connector inserted in the XC PWB.

(8) Disconnect the power cable and the signal cables between the HFG chassis and
the AC/CONTROL at the AC/CONTROL side.

(9) Set the tube replacement jig to the tube replacement jig pipe located at the upper
part of the left side of the KGTSM chassis.

(10) Mount the chain block to the jig, route the wire provided with the jig through the
eyebolt, and hang the wire on the chain block.

CAUTION: Make sure that the wire and the chain block are not damaged.

(11) Operate the chain block and confirm that the wire is taut. Then, gently remove the
four M12 chassis securing bolts. At this time, hold the chassis firmly to prevent it
from moving.

(12) Remove the eleven M6 bolts securing the AC/CONTROL chassis brackets and
remove the two brackets.

(13) Mount the two brackets to the new chassis. At this time, use a torque wrench to
tighten the eleven M6 bolts with a torque of 9.8 N⋅m (100 kgf⋅cm), and mark each
of the fastened bolts with yellow paint.

(14) Mount the new chassis to the rotation base with four M12 bolts. At this time, use a
torque wrench to tighten the four M12 bolts with a torque of 34.3 N⋅m (350 kgf⋅cm),
and mark each of the fastened bolts with yellow paint.

(15) Reassemble the components by reversing the steps for removal. At this time,
clamp the cables firmly.

(16) Remove the X-ray tube replacement jig.

(17) Disengage the mechanical stopper for rotation.

(18) Turn ON only gantry power supply CP1 and operate servo breaker CP320 and the
cover switch to set the system so that gantry rotation is possible.

(19) Use the KGTSM to perform test rotation, 2-second rotation, 1.5-second rotation,
and 1-second rotation in that order to confirm that there is no interference at any
location.

(20) Close the front cover and perform the interference check in the same manner as in
the above step.

(21) Open the front cover again and check the connections at the locations where
disconnection was performed referring to the connection diagram.

(22) Turn ON the breaker on the distribution board for the gantry rotation section power
supply and then turn ON gantry breaker NFB2.

(23) After confirming that power is turned ON normally, readjust the HFG as required.

No. 2D201-102EN*B
80
1.6.6.2 Replacing the HV/INVERTER CATHODE chassis
<Tools required>

(1) Torque wrench (34.3 N⋅m (350 kgf⋅cm)) : 1

` (9.8 N⋅m (100 kgf⋅cm)) : 1

(2) Yellow paint pen : 1

(3) Standard tools : 1 set

<Work procedure>

(1) Turn OFF the gantry rotation section breaker (NFB2). If only the rotation section
can be turned OFF at the distribution board, also turn OFF the breaker on the
distribution board for the rotation section power supply.

(2) Turn OFF the power of the gantry using CP1 and open the side cover near the
KGTSM and the front cover.

(3) Open the KGTSM section and set the retaining metal fitting securely.

(4) Turn OFF servo breaker CP320 and turn ON gantry power supply CP1 only.

(5) Release the rotation brake, slowly rotate the HV/INV CATHODE chassis manually
to a location underneath the tube replacement jig, and turn OFF gantry power
supply CP1 after locking the mechanical stopper.

(6) Remove the high-voltage cable.

(7) Set the tube replacement jig to the tube replacement jig pipe located at the upper
part of the left side of the KGTSM chassis.

(8) Mount the chain block to the jig, route the wire provided with the jig through the
eyebolt, and hang the wire on the chain block.

CAUTION: Make sure that the wire and the chain block are not damaged.

(9) Operate the chain block and confirm that the wire is taut. Then, gently remove the
four M12 chassis securing bolts. At this time, hold the chassis firmly to prevent it
from moving.

(10) Remove the eleven M6 bolts securing the chassis brackets and remove the
brackets.

(11) Mount the brackets to the new chassis. At this time, use a torque wrench to tighten
the eleven M6 bolts with a torque of 9.8 N⋅m (100 kgf⋅cm), and mark each of the
fastened bolts with yellow paint.

(12) Move the new chassis toward the R base and secure it by tightening the four
M12 bolts. At this time, use a torque wrench to adjust the fastening torque to
34.3 N·m (350 kg·cm) and make a mark on each of the fastened bolts with yellow
paint.

(13) Remove the X-ray tube replacement jig.

(14) Disengage the mechanical stopper for rotation.

No. 2D201-102EN*B
81
 (15) Turn ON only gantry power supply CP1 and operate servo breaker CP320 and the
cover switch to set the system so that gantry rotation is possible.

(16) Use the KGTSM to perform test rotation, 1.5-second rotation, 1-second rotation,
and 0.75-second rotation in that order to confirm that there is no interference at any
location.

(17) Close the front cover and perform the interference check in the same manner as
the above step.

(18) Open the front cover again and check the connections at the locations where
disconnection was performed referring to the connection diagram.

(19) Turn ON the breaker on the distribution board for the gantry rotation section power
supply and then turn ON gantry breaker NFB2.

(20) After confirming that power is turned ON normally, readjust the HFG as required

1.6.7 Replacing the rotation motor

<Tools and parts required>

(1) Sonic belt tension gauge : 1

(2) Standard tools : 1 set

(3) Gear puller (for removing the small pulley) : 1

<Work procedure>

(1) Turn OFF the gantry power supply CP1, NFB2.

(2) Open the rear covers (left and right) and the front cover.

(3) Loosen the screws securing the belt tension adjustment metal fitting.

(4) Loosen the motor securing bolts and remove the motor unit.

(5) Use the gear puller to remove the small pulley from the motor unit that was
removed in step (4) above.

(6) Remount the motor unit by reversing the removal procedures and adjust the belt
tension.

(7) Close the rear covers (left and right) and the front cover.

(8) Turn ON the gantry power supply CP1, NFB2.

NOTE: Rotating the belt tension adjustment bolt clockwise increases the belt tension,
and rotating it counterclockwise decreases the belt tension.

CAUTION: Before rotating the gantry, be sure to confirm that all of the
loosened screws are tightened firmly. Loose screws etc. may
fly off, resulting in personal injury.

No. 2D201-102EN*B
82
1.7 Adjustment and Cleaning of Each Section
1.7.1 Tilt angle adjustment
The tilt detection unit must be adjusted so that the tilt stop positions conform to the
standards listed in the table below.

When the angle is measured, set an angle measurement level on the tube mounting
plate as shown in figure below.

CAUTION: When tilting the gantry,

never place your foot on the When tilting the
stand base cover. gantry, do not
place your foot
Your foot may be caught, on this cover.
Your foot may be
resulting in injury. caught, resulting
in personal injury.

Figure 1.7-1 Setting the level

Table 7.1-1

Stop position Standards Adjustment sensor

a +30° +29.5° to +30.5° Encoder
b +0° (when moved from +30° to 0°) -0.2° to +0.2°
c -30° -29.5° to -30.5°
d -0° (when moved from -30° to 0°) -0.2° to +0.2°
e Plus-limit microswitch +30.8° to +31.3° MS31
f Minus-limit microswitch -30.8° to -31.3° MS32

To adjust the encoder, loosen the screw of the encoder mounting plate and rotate the
encoder gear by hand.

No. 2D201-102EN*B
83
 Pillow block
Encoder
Encoder mounting
plate
Gear (small)
Tilt
detection Microswitch
Gear (large)
unit
Microswitch dog (+ tilt side)

Microswitch dog (- tilt side)

Gas spring

Figure 1.7-2

No. 2D201-102EN*B
84
1.7.2 Rotation adjustment

1.7.2.1 Rotation speed adjustment

See section 3 "Gantry/Couch Control Section".

1.7.2.2 Rotation belt tension adjustment

<Measuring instrument and tools required>

(1) Sonic belt tension gauge : 1

• Model : STM303

• Manufacturer : Unitta Co., Ltd.

If the sonic belt tension gauge is not available, follow the procedure described in
"Flow of work using a push-pull gauge".

(2) Standard tools : 1 set

Adjustment procedure using the sonic belt tension gauge

<Work procedure>

(1) Remove the rear covers (left and right) and open the KGTSM inspection window
and the front cover.

(2) Turn OFF CP320 of the servo amplifier.

(3) Loosen the screws for securing the bolt-tension adjustment bracket.

(4) Loosen the motor securing bolts from the front cover side.

Tension adjustment bolt

Main frame

Timing belt

Mechanical stopper/tension
adjustment bracket Motor
Rotation mechanical
stopper bolt

Small pulley

Figure 1.7-3

No. 2D201-102EN*B
85
(5) Mark the center of the belt span. (Approx. 400 mm from the pulley)

400mm

400
mm

Figure 1.7-4

(6) Enter the data required for the sonic belt tension gauge.

(a) Weight M = 0.61 gf/cm2 or 0.061 kgf/m2 (The units differ depending on the
tension gauge type.)

(b) Width W = 40 mm

(c) Span S = 790 mm

(7) Place the sensor of the sonic belt tension gauge near the belt, and pluck both
edges of the belt with your fingers to measure the tension. The measuring points
are at four locations: tube 0°, 90°, 180°, and 270° positions. Make three
measurements at each measuring point of the left and the right and calculate the
average.

Standard:

Measured value at each point : 397 to 659 N

(40.4 to 67.2 kgf)
Average of four points : 479 to 576 N
(48.8 to 58.8 kgf)

Sensor

Belt

Be sure to pluck both edges of

the belt.

Figure 1.7-5

No. 2D201-102EN*B
86
 (8) If the belt tension does not meet the standard, move the belt-tension adjustment
bracket and measure the belt tension again using the sonic belt tension gauge. After
moving the belt-tension adjustment bracket, be sure to rotate the rotating unit more
than ten rotations at 1.5-second rotation from the KGTSM and then measure the belt
tension again using the above procedures.

NOTE: To increase the tension of the belt, rotate the tension adjusting bolt clockwise.
To decrease the belt tension, rotate the bolt counter-clockwise and push the
belt in the direction of the arrow in figure 1.7-4.

CAUTION: When rotating the gantry at the time of rotation belt tension
adjustment or rotation motor replacement, be sure to confirm
that all mounting screws that are loosened during operation are
tightened firmly to rotate the gantry.
The screws may scatter, resulting in injury.

(9) Turn ON circuit protector CP320.

(10) Remount the rear covers (left and right) and close the KGTSM inspection window
and the front cover.

Flow of work using a push-pull gauge

<Work procedure>

(1) Remove the rear covers (upper and under) and open the front cover.

(2) Turn OFF circuit protector CP320.

(3) Push the center of the belt which is 120 mm above the small pulley with the push-
pull gauge and measure a force required to displace the belt by 7 mm.
The measuring points are at four locations: tube 0°, 90°, 180°, and 270° positions.

Standard:

Measured value at each point : 23 to 47 N (2.4 to 4.8 kgf)

Average of four points : 27 to 41 N (2.8 to 4.2 kgf)

Large pulley

120mm

Small pulley
Belt

Figure 1.7-6

No. 2D201-102EN*B
87
 (4) If the belt tension does not meet the standard, move the rotation motor using the
belt-tension adjustment bracket and measure the belt tension again. After moving
the belt-tension adjustment bracket, be sure to turn ON circuit protector CP320 of
the servo amplifier, rotate the rotating unit more than ten turns at 1.5-second
rotation from the KGTSM, and then measure the belt tension again using the
above procedures.

NOTE: To increase the belt tension, rotate the tension adjusting bolt clockwise.
To decrease the belt tension, rotate the bolt counterclockwise and push
the belt in the direction of the arrow in figure 1.7-4.

CAUTION: When rotating the gantry at the time of rotation belt tension
adjustment or rotation motor replacement, be sure to
confirm that all mounting screws that are loosened during
operation are tightened firmly to rotate the gantry.
The screws may scatter, resulting in injury.

(5) Turn ON circuit protector CP320.

(6) Remount the rear covers (left and right) and close the KGTSM inspection window.

1.7.3 Tube alignment

1.7.3.1 Front/rear tube alignment

Check and position adjustment for X-ray tube front/back alignment using the
X-ray film.

<Items provided>

(1) X-ray film (mammography or Polaroid)

(2) Rubber tape

(3) Needle (used for piercing the X-ray film)

(4) Name plate (Width: 20 to 30 mm)

<Tools required>

(1) Torque wrench (350 kgf⋅cm) : 1

(2) Yellow paint pen : 1

(3) Dial gauge : 1

No. 2D201-102EN*B
88
<Work procedure>

(1) Remove the screws or Mylar ring from beneath the front cover and open the front
cover.

(2) Perform X-ray warm-up once.

(3) Place the X-ray film on the gantry dome, place the lead plate at the center of the
dome, and then adhere the rubber tape to the plate.

Dome
Dome
Lead plate

X-ray film
X-ray path

Figure 1.7-7

(4) Perform X-ray exposure at the 0-degree and 180-degree tube positions using DCA.
At the 0-degree position: 120 kV/50 mA, slit 1 mm, wedge Large-M, gantry
stopped, tube position 0 degree, 1-second scan, large focus
At the 180-degree position: 120 kV/50 mA, slit 1 mm, wedge Large-M, gantry
stopped, tube position 180 degrees, 1-second scan, large focus

NOTE: X-ray exposure conditions

1. Repeat the 400 mAs (200 mA x 2 seconds) X-ray exposure

irrespective of the corresponding OLP and warm up the X-ray tube
until the OLP wait status is established.

2. After the warming-up has been completed, cool the X-ray tubes down
to 50% OLP.

3. Perform X-ray exposure at each measurement point at the OLP

tolerance of 50% ±10%.

No. 2D201-102EN*B
89
 Figure 1.7-8

(5) Pierce the front side of the X-ray film (couch side) and develop the X-ray film.

Hole

Figure 1.7-9

No. 2D201-102EN*B
90
(6) Use the developed film to measure the shift σ1 when X-ray exposure is performed
at the 0-degree position and the 180-degree position, and then use the following
formula to obtain the shift X1 of the X-ray tube.

When X-ray exposure is performed at

the 180° position

When X-ray exposure

σ1
is performed at the 0°
position
Developed film

Hole

Figure 1.7-10

Formula:

215
X1 = (σ1 + η2) ×
360 + 385

25
η2 = X1 ×
215

215
X1 = σ
720 1

No. 2D201-102EN*B
91
(7) Move the forward and backward positions of the X-ray tube to a value based on the
calculation results. Iterate steps (4) to (8) until the X1 is below 0.1 mm.

X1

FOCUS

215
SLIT

385
σ1 η2

360
215 25
SLIT

FOCUS
X1

Figure 1.7-11

No. 2D201-102EN*B
92
(8) Adjusting the longitudinal position of the tube

● Attach the dial gauge to the rotation base as shown in the figure below and
place the pick-up of the dial gauge to the front of the tube mounting plate. Then,
loosen the fixing bolts to make the tube mounting plate free. Turn the adjusting
bolts by the required number of turns calculated in step (8) to adjust the
longitudinal position.

Adjusting bolt

Figure 1.7-12 Adjusting bolts

● After adjustment, tighten the fixing bolts.

The fixing bolts (M12, 4 locations) must be tightened with a tightening torque of
350 kgf⋅cm. After tightening, use the yellow paint pen for paint-locking.

No. 2D201-102EN*B
93
1.7.3.2 Left/right tube alignment
(1) Mounting the pin phantom

The left/right tube alignment requires a pin phantom. Mount the pin phantom on
the phantom holder as shown in figure 1.7-13.

Phantom holder Pin phantom

Figure 1.7-13 Mounting the pin phantom

(2) Adjusting the tube left/right position

Attach the dial gauge to the tube mounting plate as shown in the figure below and
place the pick-up of the dial gauge to the tube. Then, loosen the fixing bolts to
make the tube mounting plate free. Turn the adjusting bolts by the required
number of turns according to the instructions of the software to adjust the left/right
tube position.

Adjusting bolt

Figure 1.7-14

No. 2D201-102EN*B
94
1.7.4 X-ray alignment software

1.7.4.1 General
This X-ray alignment software (program) supports the following tube alignment:

(1) Left/right tube alignment (L/R ALIGNMENT PROCESS)

Front, rear, left, and right: These directions are defined viewing the gantry from the
patient couch.

CAUTION: Do not turn ON/OFF the power of the system or the gantry
during alignment.
Otherwise, the position information of the gantry will be
lost when the power of the system or the gantry is turned
ON, and the gantry may rotate suddenly, leading to injury.

1.7.4.2 Start-up procedures

Start up this program referring to the Software Service Manual.

No. 2D201-102EN*B
95
1.7.5 Projector adjustment procedure

1.7.5.1 Side and slant projector adjustment

<Work procedure>

(1) Set the water phantom in the phantom holder.

After confirming that the phantom has no Tape
irregularity, align the phantom with the center of
the scanning area.

(2) Use adhesive tape to attach strips of solder along Solder

the slice line and the image center line of the
water phantom.

(3) Verify that the solder is set correctly, using a

scanogram image.

(4) Turn ON the inner projectors and adjust the right

and left projector positions so that the light lines
from the projectors are aligned with the solder.

(5) Move the couch top to a position where the light

Solder
from the projectors does not hit it.

Figure 1.7-15

(6) Turn ON the inner projectors to project the light lines onto a paper and verify that
there is no misalignment between the light beam pattern from the right and left
projectors. If there is misalignment, repeat steps (4) to (6), so that there is no
misalignment between the right and left projectors.

Incorrect

Incorrect

Correct

There should be no misalignment at every position.

Figure 1.7-16

No. 2D201-102EN*B
96
1.7.5.2 Median projector adjustment
<Work procedure>

(1) Move the head-side of the couch top

(portion with the gray spots) so that it is Couch top
below the median projector, raise the couch
to the UP limit. Gray spots

(2) Align the light beam pattern from the

median projector with the gray spots.

Figure 1.7-17

(3) With the couch top left as it is, lower the couch top to the HEIGHT-1 position. At
this time, make sure that the light beam pattern from the median projector is
aligned with the gray spots on the couch top.

(4) If the light beam pattern from the median projector is not aligned with the gray
spots, adjust as shown below.

Gray spots
Light beam pattern
1 mm or less

Make the amount of Light beam

Gray spots deviation the same on both pattern
the left and right.

Figure 1.7-18

No. 2D201-102EN*B
97
1.7.6 Procedure for cleaning the large-current slipring

DANGER: Be sure to turn OFF all the

breakers on the distribution
board if it is necessary to Turn OFF all the
breakers on the
touch the slipring and distribution board
brushes. before removing
the dome cover.
High voltage in the slipring High voltage in the
and the brushes may cause slipring and the
brushes may cause
electric shock. electric shock.

CAUTION: When cleaning the slipring brush, observe the following precautions.

* If burrs are found on the brushes, remove them using a cutter. Never
use sandpaper to remove burrs from the brushes. If grains from the
sandpaper enter the brushes, abnormal wear of the brushes may
result.

* When removing the cover, be careful not to apply a force to the ring or
to damage it.

* Be careful handling the brushes because they are fragile.

Remove only the burrs of the brushes using a cutter.

* Take care not to allow abraded material (powder) to fall in the gantry.

* When mounting the brushes, position them at the center of the ring.

* Verify that the cable is connected correctly.

NOTE: Before starting work, thoroughly ventilate the work area and take protective
measures such as wearing a protective mask.

The sliprings employ carbon brushes containing metal elements, and abraded
brush material will therefore be generated.

<Tools and parts required>

(1) Standard tools : 1 set

(2) Sandpaper : 1 sheet

(3) Rag

No. 2D201-102EN*B
98
<Work procedure>

DANGER: Be sure to turn OFF the power of the distribution board before
this work.

(1) Remove the Mylar ring, the rear covers (left and right), and the dome cover.

(2) Disconnect the brush holder cable terminal and remove the brush holder.

(3) Wipe off the brushes and the brush holder.

At this time, check the abrasion of brushes.

(4) Wipe off the slipring and the slipring holder.

(5) Remount the brush holder to the bracket and connect the cable.

(6) Turn ON the power of the gantry and rotate the rotation section by 90° in local
mode from the maintenance panel.

DANGER: Never touch the slipring, brushes, etc. after supplying power
to the gantry.

(7) Turn OFF the power of the gantry and wipe off sliprings and ring holder that have
not yet been cleaned.

CAUTION: Confirm that the power of the gantry is turned OFF securely.

(8) Remount the dome cover and the rear cover.

No. 2D201-102EN*B
99
1.7.7 Procedure for adjusting the operating panel acrylic cover
When the acrylic cover or PWB for the operating panel is replaced, the clearance
between switch key tops and the opening edge of the acrylic cover will be incorrect.
Following the procedure below, adjust the cover to obtain the correct clearance.

<Tools required>

(1) Standard tools

(2) Clearance gauge

<Work procedure>

(1) Loosen the fixing screws for the acrylic cover.

(2) Measure the clearance between the switch key tops and the opening edge of the
acrylic cover (at the top, bottom, right, and left of each switch). Adjust the acrylic
cover so that the clearance is 0.5 mm or more on all sides.

(3) Tighten the acrylic cover fixing screws.

Repeat the procedure above until all clearances are 0.5 mm or more.

5-M4

PWB
Clearance gauge

Switch key top

Acrylic plate

Figure 1.7-19

No. 2D201-102EN*B
100
1.7.8 Cover cleaning method
To clean the front cover, dome cover, metal covers such as the side cover, top cover,
resin cover, rear cover, stand cover, and the Mylar ring, wipe them using a cloth
moistened with mild detergent or warm water and then thoroughly wrung out (to prevent
dripping).
Contact with volatile liquids such as alcohol may damage the coating of the covers.
Some chemicals may also reduce the strength of the covers.

When cleaning the mat switch, do not allow any object with a sharp edge to come into
contact with it and do not catch its edge section with a rag, etc. Otherwise, the mat
switch may malfunction.

1.7.9 Procedures for removing the optical system

CAUTION: Do not touch this motor.

The motor is hot and can cause
burn injury.

<Work procedure>

(1) Set the X-ray tube to the 180° position.

(2) Turn OFF the breaker (NFB2) of the rotation section.

(3) Turn OFF servo protector CP320.

(4) Separate the optical system shielding cover and the X-ray system cables.

(5) Remove the optical system shielding cover (front cover only).

(6) Remove the sensors of the slit and wedge (1 each) and the connectors of the
motor (2 each).

(7) Remove the slit and wedge base-plate bolts (M6 x 4) and remove the optical
system together with the base.

No. 2D201-102EN*B
101
 Oil cooler cable

Optical system Slit

shield cover

• High-voltage cable
• Tube cable

Figure 1.7-20 Removing the optical system

No. 2D201-102EN*B
102
 Optical system
(slit, wedge)

Shield cover

Figure 1.7-21 Removing the optical system

No. 2D201-102EN*B
103
1.8 Important Fastening Assemblies of Each Unit
If the screws or bolts shown in figure 1.8-1 are removed, use the appropriate torque
wrench to tighten them with the corresponding tightening torque specified in table 1.8-1.
After tightening, use yellow paint for paint-locking.

<8> TUBE-MTG-ASSY mounting bolt <9> OIL-COOLER-ASSY mounting bolt

<15> WEIGHT-ASSY mounting bolt

<16> WEIGHT mounting nut

<7> Front cover ARM

mounting bolt

<18> HV/INV
mounting bolt
<1> Tilt power cylinder <19> HV/INV bracket
bracket mounting bolt mounting bolt

<14> Detector unit

<2> Power cylinder shaft mounting bolt
retaining plate
mounting bolt

<20> AC/CONT mounting

bolt
<21> AC/CONT bracket
mounting bolt

<10> PWB chassis mounting bolt

<11> DAS.PSU-ASSY mounting bolt

<13> Beam trimmer mounting bolt
<12> R-POWER-ASSY mounting bolt
<15> WEIGHT-ASSY mounting bolt
<17> WEIGHT-ASSY mounting nut

Figure 1.8-1 Unit mounting section: 42-kW HFG (front)

No. 2D201-102EN*B
104
 Pillow block
Encoder

<3> Tilt encoder gear

setscrew

<4> Pillow-side gear

mounting bolt

Microswitch

Figure 1.8-2 Tilt detection section

<5> LCSR brush ASSY

mounting bolt

<6> LCSR ring ASSY

mounting bolt

Figure 1.8-3 Units mounted in the gantry (rear view)

No. 2D201-102EN*B
105
 Table 1.8-1 Important fastening assemblies of each unit

Important fastening Tightening

No. Type of screw/bolt Quantity
assembly torque
1 Tilt power cylinder M8 (hexagonal socket head bolt), 3 83.3 N⋅m
bracket mounting bolt 30 mm long (850 kgf⋅cm)
2 Power cylinder shaft M6 (hexagonal head sems bolt), 2 4.4 N⋅m
retaining plate mounting 12 mm long (45 kgf⋅cm)
bolt
3 Tilt encoder gear M4 (W-point hexagonal socket 4 2.2 N⋅m
setscrew head screw), 4 mm long (22 kgf⋅cm)
4 Pillow-side gear M6 (hexagonal head sems bolt), 2 4.4 N⋅m
mounting bolt 16 mm long (45 kgf⋅cm)
5 LCSR brush ASSY M8 (hexagonal socket head bolt), 3 9.9 N⋅m
mounting bolt 20 mm long (101 kgf⋅cm)
6 LCSR ring ASSY M8 (hexagonal socket head bolt), 9.9 N⋅m
mounting bolt 100 mm long (101 kgf⋅cm)
7 Front cover ARM M6 (hexagonal head sems bolt), 4.4 N⋅m
mounting bolt 16 mm long (45 kgf⋅cm)
8 Tube-MTG-ASSY M12 (hexagonal socket head bolt), 34.3 N⋅m
mounting bolt 60 mm long: When the 2-MHU (350 kgf⋅cm)
tube, 3.5-MHU tube,
or 4-MHU tube is
mounted
70 mm long: When the 6.5-MHU
tube is mounted
9 OIL COOLER-ASSY M12 (hexagonal socket head bolt), 34.3 N⋅m
mounting bolt 30 mm long (350 kgf⋅cm)
10 PWB chassis mounting M12 (hexagonal socket head bolt), 34.3 N⋅m
bolt 30 mm long (350 kgf⋅cm)
11 DAS.PSU-ASSY M12 (hexagonal socket head bolt), 4 34.3 N⋅m
mounting bolt 30 mm long (350 kgf⋅cm)
12 R-POWER-ASSY M12 (hexagonal socket head bolt), 3 34.3 N⋅m
mounting bolt 30 mm long (350 kgf⋅cm)
13 Beam trimmer mounting M8 (hexagonal head sems bolt), 4 10.8 N⋅m
bolt 30 mm long (110 kgf⋅cm)
14 Detector unit mounting M12 (hexagonal socket head bolt), 6 34.3 N⋅m
bolt 70 mm long (350 kgf⋅cm)
15 WEIGHT-ASSY M12 (hexagonal socket-head bolt), 6 34.3 N⋅m
mounting bolt 30 mm long (When the (350 kgf⋅cm)
42-kW
HFG is
mounted)
16 WEIGHT mounting nut M12 nuts 4 10.8 N⋅m
(When the (110 kgf⋅cm)
42-kW
HFG is
mounted)

No. 2D201-102EN*B
106
 Important fastening Tightening
No. Type of screw/bolt Quantity
assembly torque
17 WEIGHT-ASSY M8 nuts 2 37.3 N⋅m
mounting nut (When the (380 kgf⋅cm)
42-kW
HFG is
mounted)
18 HV/INV mounting bolt M6 (hexagonal socket-head bolt), 11 9.8 N⋅m
25 mm long (When the (100 kgf⋅cm)
42-kW
HFG is
mounted)
19 HV/INV bracket M12 (hexagonal socket-head bolt), 4 34.3 N⋅m
mounting bolt 30 mm long (When the (350 kgf⋅cm)
42-kW
HFG is
mounted)
20 AC/CONT mounting bolt M6 (hexagonal socket-head bolt), 11 9.8 N⋅m
25 mm long (When the (100 kgf⋅cm)
42-kW
HFG is
mounted)
21 AC/CONT bracket M12 (hexagonal socket-head bolt), 4 34.3 N⋅m
mounting bolt 30 mm long (When the (350 kgf⋅cm)
42-kW
HFG is
mounted)

No. 2D201-102EN*B
107
2. Mechanical Section of the Patient
Couch
2.1 Outline
This section describes the principles of operation and repair methods for the patient
couch CBTB-015A.

2.1.1 Description of the structure and operation of the patient couch

The patient couch is used to position the patient for scanning. Positioning is performed
by SLIDE (IN/OUT) and HEIGHT (UP/DOWN) operations.
The patient couch includes the SLIDE and HEIGHT sensor interface board and the
mechanism which supports the drive units.

SLIDE UNIT

SI KGTSM board

HEIGHT UNIT

Operating panel

Patient couch Gantry

Figure 2.1-1 Block diagram of the patient couch

No. 2D201-102EN*B
108
2.2 Description of the Structure of the Main Patient Couch
Unit

Upper frame Couch top

Longitudinal
movement
drive unit

Vertical Vertical
movement movement
mechanism drive unit

Figure 2.2-1

Upper cover

Lower cover

Figure 2.2-2

No. 2D201-102EN*B
109
2.2.1 Main frame unit
The main frame unit is mounted on the upper frame of the vertical movement
mechanism. The couch top, couch top drive unit, couch top moving frame, and upper
cover are installed on the main frame unit.
The main frame unit includes two U-shaped rails to guide the longitudinal movement of
the couch top, the stabilizing rail for the couch top, the frame movement stopper, and
the couch top UP/DOWN adjustment roller.

Frame
movement
stopper

Stabilizing rail for

couch top

Couch top UP/DOWN adjustment roller

Figure 2.2-3

2.2.2 Longitudinal movement drive unit

The longitudinal movement drive unit rotates the slide motor (M11) CW and CCW to
move the couch top in the IN/OUT direction by supplying 200 VAC power controlled by
the KGTSM on the gantry and the sliding servo amplifier under the couch vertical
movement mechanism.

Table 2.2-1 Motor rotation and couch top movement

Motor (M11) Couch top

CW IN
CCW OUT

No. 2D201-102EN*B
110
 Table 2.2-2 Engagement and release of the brake and clutch

Operation status Brake Clutch

When the power is OFF Engaged Released
When the power is ON (other than free status) Released Engaged
When the power is ON (free status) Released Released

The longitudinal movement drive unit is responsible for linear movement of the couch
top. It comprises a motor, reducer, clutch brake, encoder, drive sprocket, and chain.
Motor rotation is transmitted to the drive sprocket through the clutch brake.
Drive sprocket rotation is transmitted to the chain to move the couch top linearly through
the metal coupler. The tension of the chain can be set by adjusting the tension sprocket
on the main frame unit on the gantry side with the tension-adjustment bolt. When the
chain is slack, the pitch feed error is increased. When the chain is too tight, free feeding
becomes difficult.
The accuracy of the linear movement of the couch top is detected by the encoder.
The rated load of the encoder axis is 20 N (2 kgf) in the radial direction and 10 N (1 kgf)
in the thrust direction. The encoder should be handled with care.

ETP
bush Clutch brake
(CBU11)

Reducer

Motor (M11)

Encoder
(ENC11) Metal coupler
Tension sprocket
ETP bush

Drive sprocket Chain

Tension-adjustment
bolt

Figure 2.2-4 Longitudinal movement drive unit

No. 2D201-102EN*B
111
2.2.3 Couch top moving frame
The couch top moving frame is driven by the longitudinal movement drive unit. It is
moved horizontally along the U-shaped rails and the stabilizing rails in the main frame
unit by a chain. The couch top is secured to the couch top moving frame with bolts.

The couch top can be made horizontal using the four setscrews tightened from above,
and can be stabilized in the lateral direction by tightening the two setscrews on the side
of the couch top moving frame.

Bolt and cap

Metal
coupler Setscrew
(for levelling)

Couch top

Setscrew
(for lateral stabilization)
Couch top moving
frame
Frame movement
stopper

Chain

Stabilizing rail for couch top

Figure 2.2-5

No. 2D201-102EN*B
112
2.2.4 Vertical movement mechanism
The vertical movement mechanism includes the internal and external arms, the
bearings attached to these arms, and the upper and lower frames on which the bearings
slide.

Bearing
Upper frame

External arm

Internal arm

Lower frame

Figure 2.2-6

No. 2D201-102EN*B
113
2.2.5 Vertical movement drive section
The vertical movement drive section moves the patient couch vertically under hydraulic
power. The patient couch is moved upward by the ram of the single-action cylinder,
which pushes the internal arm upward.
A 200 W motor and gear pump supply oil from the oil tank to the cylinder.
The patient couch is moved downward by actuating two electromagnetic valves to
release the oil in the single-action cylinder.
Note that the speed of descent varies depending on the patient's weight and the oil
temperature.
Figure 2.2-7 shows the structure of the vertical movement drive unit. Figure 2.2-8
shows the oil pressure circuit diagram.
An overcurrent relay (CP5) is mounted on the power line of the motor of the gear pump.
When an overcurrent (more than 2.5 A) flows, the relay operates to turn the power OFF
and prevents the motor from smoking and burning.

Motor with
gear pump

Electromagnetic
valve (L24) Oil tank

Electromagnetic
valve (L21)
Ram High-pressure
Overcurrent relay
hose
Single-action (CP5)
cylinder

Figure 2.2-7

No. 2D201-102EN*B
114
 Hose

L24

Cylinder

Electromagnetic
Check valve valve
L21 Throttle valve

M
Pump Relief
valve

Figure 2.2-8

No. 2D201-102EN*B
115
2.2.6 Couch top
The couch top is used to set the patient at the scanning position.
The couch top is made of carbon fiber reinforced plastic (CFRP).
Velcro tape is provided along the sides of the couch top for attaching the patient
immobilizing bands.
The region of the patient positioned within the white tape can be scanned.
The couch top is attached to the moving frame with two M12 bolts. These bolts can be
seen when the upper nylon caps are removed.
(Since the couch top is supported only by these bolts, be sure to tighten them if they
become loose.)

Velcro tape (black) Nylon cap

M12 bolt

Velcro tape (white)

Figure 2.2-9 Couch top

No. 2D201-102EN*B
116
2.2.7 Upper covers
The upper covers are used to protect the patient from the drive unit and to give the unit
a finished appearance.
The procedures for removing the upper covers are as follows: Be sure to turn OFF the
power before removing the covers.

Cap (2)
<9> Chain cover M4 screw (2)

<7> Couch top

under
cover B

Cap (2) <1> Separate

M4 screw (2) end
cover

M4 screw
<6> Couch top (2)
under
cover A <8> Main
frame
Blind cover cover
<4> <5> Rolled cover

M4 screw (4)

M4 screw (3)
Frame
<2> Horizontal drive
unit cover

M4 screw (2)

<3> Bottom
cover R
<3> Bottom cover L

M4
screw M4 screw (2)
Cap

Figure 2.2-10

No. 2D201-102EN*B
117
2.2.7.1 Removing the upper covers
<1> Separate end cover : This is attached onto the main frame using two M4
screws.

<2> Horizontal drive unit : Remove the couch top free lever cover along with
the metal fitting (M5 screw).
Loosen the two M4 screws and lower the back of
the cover while sliding the cover forward.
Disconnect the grounding cable.

<3> Bottom covers R, L : Remove the one M4 screw with a cap (gantry side)
and the two M4 screws without caps from the top
bottom of the frame.
Disconnect the grounding cable.

<4> Rolled cover sheet : Remove the separate end cover and move the
couch top to the OUT limit manually.
Insert a screwdriver from the foot end of the
patient couch and loosen the M4 screw on the
travel frame side.
Allow the detached sheet to wind onto the roller
slowly and fix so that the metal fitting at the top of
the sheet is inserted between the guide roller of
the rolled cover mounting plate and the cover.

<5> Rolled cover : Remove the sheet of the rolled cover, fix the metal
fitting at the top of the sheet, remove the couch top
under cover B, loosen the two M4 screws for fixing
the frame, remove the horizontal drive unit cover,
and loosen the two M4 screws for fixing the frame
side.

<6> Couch top under cover A : Move the couch top to the OUT limit, remove the
couch top and remove the caps and two M4
screws. (It is not necessary to remove the rolled
cover sheet.) Disconnect the grounding cable.

<7> Couch top under cover B : Move the couch top inward until the entire couch
top under cover B is visible and remove the caps
and two M4 screws. (It is not necessary to remove
the rolled cover sheet.)
Disconnect the grounding cable.

<8> Main frame cover : Remove the separate end cover, the horizontal
drive unit cover, the under covers (R and L), and
rolled cover sheet, then remove the couch top,
remove the blind cover (pasted), move the couch
top moving frame to the IN limit and remove the six
M6 screws.

<9> Chain cover : Remove the main cover and loosen the three M4
screws.

No. 2D201-102EN*B
118
 Travel frame

Rolled cover sheet section

Separate end cover

Figure 2.2-11

Position of metal fitting

Figure 2.2-12

No. 2D201-102EN*B
119
 Guide roller

Stopper plate

Figure 2.2-13

No. 2D201-102EN*B
120
2.2.8 Lower covers
The lower covers include the flexible cover to protect the patient couch links, side
covers, front cover and rear cover. For a sectional view of these covers, see figure
2.2-15.

Flexible cover

Rear cover
Side cover

Side cover

Front cover

Figure 2.2-14

Bottom cover Longitudinal movement

(included in the upper covers) drive unit cover
Support plate A 2-M4

Flexible cover

Oil tank Pump

Support plate A
Lower cover
4-M4

M4 screw (2)
Support plate B 4-M4

Figure 2.2-15 Sectional view of the lower covers

• When the bottom covers R and L and six support plates A are removed, the flexible
cover can be lowered.

• The flexible cover can be lifted by removing the lower cover (front and rear), four
support plates, and two M4 screws at the center.

No. 2D201-102EN*B
121
2.3 Troubleshooting and Repair
Troubleshooting and repair actions Y: YES N: NO

<Symptom> <Check> <Repair procedure>

The patient Is the hydraulic pump in N Check the patient couch

couch does motion? electrically (with 180 VAC or
not go up. Y more). Raise the couch if it is
in the lowest position.

Check whether the overcurrent

relay is operating.

Is the hydraulic pump N Add oil to the hydraulic system.

making normal operating
noises? N
Check the solenoid valve
Y electrically.

Any oil leakage?

Go to "Oil Leakage" (on the
Y next page).

The patient Is the room temperature Y Move the couch up and down
couch does low? repeatedly to warm the oil.
not go down. N
Is the couch top inside Y Move the couch top to the OUT
the gantry opening? limit.
N
Is the gantry tilted in the Y Tilt the gantry to 0° or in the
plus direction? minus direction.
N
N
Is the tilt encoder on the Replace the tilt encoder.
gantry normal?
Y Y
Replace the solenoid valve.
Is the rated voltage on
solenoid valve?
Check the electric circuit.
N

No. 2D201-102EN*B
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<Symptom> <Check> <Repair procedure>

Oil leakage Visible oil leakage Y Replace the solenoid valve.

source? N
Î Refer to subsection 2.5.4.
N
Is the rate of sinking Y
0.25 mm/min or less? Troubleshoot again in detail.

The couch Is the couch high N Move up the couch to the upper
top does not enough? limit.
go into the Y
opening of Check whether the connector of
the gantry. the IN-limit sensor is
disconnected or whether there
are obstacles in the beam
emitting/receiving section of the
sensor.

Check whether the overcurrent

relay is operating.

N
Is the motor in motion? Perform electrical check.
Y (Is an error message issued for
the sliding servo amplifier under
the couch vertical movement
mechanism?)

Is the belt properly N Adjust the tension of the belt (to

tensioned? 2.3 mm ±0.2 mm/2 N (0.2 kgf)).
Y Î See subsection 2.6.7.
N
Is the pulley rotating? Tighten the screw fastening the
Y pulley to the shaft.

Is the clutch shaft N Replace the clutch/brake.

rotating?
Î See subsection 2.5.2.
Y
Are the gears rotating? N
Tighten the screw of the ETP
Y bushing to fix it to the shaft.

Does the chain move? N Fix the couplings of the chain.

Y
Is the couch top coupled N
to the chain?

No. 2D201-102EN*B
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<Symptom> <Check> <Repair procedure>

N
The couch Is the motor in motion? Check whether the connector of
top does Y the OUT-limit sensor is
not go out disconnected or whether there
of the are obstacles in the beam
gantry emitting/receiving section of the
opening. sensor.

Check whether the overcurrent

relay is operating.

Check the motor circuit

electrically.
(Is an error message displayed for
the slide servo amplifier mounted
under the couch vertical
movement mechanism?)

Is the belt properly N Adjust the tension of the belt (to

tensioned? 2.3 mm ±0.2 mm/2 N (0.2 kgf)).
Y Î See subsection 2.6.7.

Is the pulley rotating? N Tighten the screw fastening the

Y pulley to the shaft.

N
Is the clutch shaft Replace the clutch/brake.
rotating? Î See subsection 2.5.2.
Y
N
Are the gears rotating? Tighten the screw of the ETP
Y bushing to fix it to the shaft.

N
Does the chain move? Fix the couplings of the chain.
Y
Is the couch top coupled
to the chain? N

Poor stop Are belt tension and gear N Adjust the belt tension and the
accuracy backlash OK? gear backlash.
Y Î See subsections 2.6.4
and 2.6.8.
Y
Is any foreign object in the Remove the object.
driving system?
N
Is the coupling screw of N Tighten the coupling screw of the
the encoder tightened? encoder.
Î Refer to figure 2.5-15.

No. 2D201-102EN*B
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<Symptom> <Check> <Repair procedure>

The couch Adjust the height of the rollers.

top rides Î See subsection 2.6.5.
over the
roller.

N
Heavy idle Is the chain tension OK? Adjust the chain tension (10 mm
movement Y deflection with 20 ±2 N
of the couch (2.0 ±0.2 kgf)).
top Î See subsection 2.6.8.
Y
Is anything in the way of Remove the foreign object.
the couch top?
N
Adjust the gear backlash.
Î See subsection 2.6.4.
N
The couch Are bolts mounting the Tighten the bolts firmly.
top rattles couch top tightened
firmly?
Y
Are travel frame rollers N Correct the eccentricity and fix
fixed firmly? them tightly.
Y
N
Are anti-sway rails fixed Fix them correctly.
tightly?
Y
Is the couch top Y Replace the couch top.
The couch
top is deformed?
curved.

Y
Noises in Noises in the motor? Adjust the gear backlash.
the N Î See subsection 2.6.4.
horizontal
drive unit
Check whether the parameters for
the slide servo amplifier are set
correctly.

Perform the electrical check (on

the clutch, supply voltage, etc.).

Clutch/brake clashing Y Check the clutch/brake assembly.

noises? Î See subsection 2.6.6.

No. 2D201-102EN*B
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<Symptom> <Check> <Repair procedure>

Noises in Noises made by the Y Adjust the drive sprocket and the
the frame chain? tension sprocket so that the chain
does not hit any part of the frame.
N
Does the couch top ride Adjust the height of the rollers.
over the rollers? Î See subsection 2.6.5.

Interference Adjust as described in subsection

between 2.6.9 of this manual.
the internal Î See subsection 2.6.9.
cable and
the electro-
magnetic
valve L24

The patient Is the correct voltage Check the control PWB and the
couch does (24VDC±10%) applied to N cable to confirm that the correct
not move the brake built into the voltage is applied.
inward/ motor?
outward.
Check it as described in "The
couch top does not go into the
Y gantry opening" and "The couch
top does not go out of the gantry
opening" in this manual.

No. 2D201-102EN*B
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2.4 Jacking Up and Lowering the Patient Couch
2.4.1 Jacking up the patient couch
When the patient couch is disabled to move up from the DOWN limit, it must be jacked
up for check of parts inside the patient couch. Jack up the patient couch as shown
below.

<Work procedure>

(1) Remove the front bottom cover of the patient couch and bottom covers R and L of
the top frame to install the jack. (The jig cover need not be removed.)
For sites at which the footswitch is installed, remove the front cover after the
footswitch cover (4-M4) has been removed.

Bottom cover R

Front lower
cover

Bottom cover L
Footswitch cover
(option)

Jig cover

Figure 2.4-1

No. 2D201-102EN*B
127
(2) Place the jack on the rear end of the jig cover and gradually jack up the couch top
at the upper frame rib. (A force of approx. 3 kN (300 kgf) is required to raise the
couch top.) A typical automobile jack can raise the couch top about 60 cm
(maximum).

Upper frame rib

Roller under the couch top
6 cm 25 cm
Upper frame rib

60 cm
Jig cover

Lower frame rib

Figure 2.4-2

CAUTION: When inspection is performed with the patient couch raised

with an automotive jack, the upper frame may fall, resulting in
injury if the jack slips. Therefore, place a square piece of wood
between the frame and floor to ensure safety even if the jack
slips.

No. 2D201-102EN*B
128
2.4.2 Lowering the patient couch
If a failure occurs when the patient couch is at a raised position (for example, a fuse in
the gantry blows out and no power is supplied to the patient couch), lower the patient
couch as specified below.

CAUTION: During this operation, 200 VAC is supplied directly to the

connector. Take care to avoid electric shock. Keep hand or
head from being caught when the patient couch is moving
down.

<Work procedure>

(1) Remove the jig cover between the gantry and patient couch so that the connector
on the front of the patient couch can be seen.

Upper cover

Jig cover

Lower cover

Figure 2.4-3

(2) When 200 VAC is supplied between pins 8 and 10 of CNN1 and between pins 9
and 10, the solenoid valves for down movement are opened and the patient couch
moves down. (There are two solenoid valves provided and pin 10 of CNN1 is a
common pin.)

No. 2D201-102EN*B
129
NOTE: Recommended jig for lowering the patient couch
Construct a jig like the one shown below for lowering the couch safely and
correctly.

CNN
8
9
10 AC 200 V

Connector type Japan

AMP350736-1

ON OFF

Figure 2.4-4

No. 2D201-102EN*B
130
2.5 Part Replacements
2.5.1 Replacement of the flexible cover
This section describes procedures to replace a damaged flexible cover.

<Work procedure>

(1) Remove the bottom cover R and L of the upper frame, the front lower cover, and
the rear lower cover.

Bottom cover R
(3-M4)

Rear lower cover

(2-M4)

Bottom cover L
(3-M4)

Front lower cover (2-M4)

Figure 2.5-1

No. 2D201-102EN*B
131
(2) Separate the flexible cover from the frame and push down the flexible cover.

Remove retaining plates A (M4, 6 plates), retaining plates B (M4, 4 plates), and two
M4 screws at the lower center of the flexible cover.

Thus, the flexible cover is separated from the frame.

Retaining plate A
(6-M4)

Retaining plate B
(4-M4)

(2-M4)

Figure 2.5-2

(3) Remove the rolled cover sheet. (The spring that takes up the sheet may cut the
user’s hands, and so replacement is recommended.)

Remove the separate end cover and move the couch top toward the OUT limit
manually (figure 2.5-3). Insert a screwdriver from the foot end of the patient couch
(figure 2.5-4) and loosen the M4 screw on the travel frame side.
The rolled cover sheet can be removed.

Allow the detached sheet to wind onto the roller slowly and fix so that the metal
fitting at the top of the sheet is inserted between the guide roller of the rolled cover
mounting plate and the cover (figure 2.5-5).

No. 2D201-102EN*B
132
 Move the travel frame to the OUT limit.

Sheet

Remove the separate end cover

Figure 2.5-3

Setscrew

Screwdriver

Figure 2.5-4

No. 2D201-102EN*B
133
 Plate

Figure 2.5-5

No. 2D201-102EN*B
134
(4) Remove the couch top, couch top under covers A and B, the horizontal drive unit
cover, and the blind covers. Move the top slide frame to the IN limit, and remove
the main cover.

To easily remove the main cover, lift the main cover at the side of the horizontal
drive unit (<1>) and lift the whole main cover while moving the cover towards the
gantry (<2>).

Couch top fixing bolt

2-M12

Couch top
2-M4
Couch top under
cover B

2-M4
<1> Separate end
cover

Main cover
Couch top under
cover A

Blind cover
3-M6

Rolled cover
<2>
3-M6

Frame

Horizontal drive
unit cover
2-M4

Figure 2.5-6

No. 2D201-102EN*B
135
 (5) Disconnect the cables from the vertical drive unit (grounding cable, two connectors,
two cable clamps, vertical photosensor cable, and potentiometer cable).

Vertical photosensor
cable

Cable (Black)
Cable (Two cable clamps)
Cable (Black)

Potentiometer

Cable (White)
(Unsolder the cables.)

Figure 2.5-7

To the upper
frame
Cable clamp

Solenoid valve (L24)

Ram

Solenoid valve (L21)

Grounding cable
Connector High-pressure hose
Single-
acting cylinder

Figure 2.5-8

No. 2D201-102EN*B
136
(6) Remove the upper frame. (This work requires two people.)

Place the upper frame on proper protective materials such as square timber to
keep PWBs and the horizontal drive unit on the upper frame from being pressed by
the frame weight.

Upper frame

Upper frame

Horizontal
Square timber drive unit

Figure 2.5-9

No. 2D201-102EN*B
137
(7) Prepare the new flexible cover.

(8) Remove the flexible cover from the vertical drive unit as shown below.

Flexible cover

Figure 2.5-10

(9) Reverse the above steps to remount the flexible cover.

As described in subsection 2.6.9, extreme care must be exercised to avoid interference

with electromagnetic valve L24 during routing of the internal cable.

No. 2D201-102EN*B
138
2.5.2 Replacement of the clutch/brake of the horizontal drive unit
This section describes procedures to replace the clutch/brake.

<Work procedure>

(1) Remove the rolled cover sheet, the couch top under cover B, and the horizontal
drive unit cover. Remove the tabletop unlocking lever together with the block
beforehand.

2-M4

Couch top under

cover B

Main cover

Horizontal
drive unit

Rolled cover

2-M4

Horizontal drive
unit cover

Figure 2.5-11

No. 2D201-102EN*B
139
(2) Remove the backlash control bolt, its mounting screws and the PWB mounting
screws.

Mounting screw
6-M6
Backlash control bolt

PWB mounting screw

Figure 2.5-12

No. 2D201-102EN*B
140
(3) Disconnect the connectors and the grounding wire.

Plate for mounting the

horizontal drive unit

Mounting plate for

connectors

PWB * For the rectangular

connectors, the driver
side connectors must
be disconnected from
Connectors the mounting plate after
being pulled out from
the motor side.

Figure 2.5-13

(4) Hold the plate mounting the horizontal drive unit, slide it a little toward the couch,
and move it up to detach.

Reducer

Figure 2.5-14

(5) Loosen the coupling screws (2-M4), remove the encoder assembly, remove the
bolts (3-M6) fixing the reducer and the bolts controlling the tension of the belt,
disengage the belt from the pulley, then remove the clutch brake from the fitting
(4-M6).

No. 2D201-102EN*B
141
 (6) Usually the clutch brake is replaced as a unit together with the gear and the pulley.

Motor

Encoder ASSY

Coupling screws

Clutch brake
Belt-tension-
controlling bolt

Reducer
Pulley
Belt
Gear Reducer fixing bolt

Figure 2.5-15

No. 2D201-102EN*B
142
2.5.3 Replacement of the rolled cover
This section describes procedures to replace the rolled cover. This work is required
when the rolled cover sheet is damaged or the roller cannot take up the rolled cover
sheet.

<Work procedure>

(1) Remove the rolled cover sheet.

(2) Remove the rolled cover assembly.

Remove the horizontal drive unit cover (figure 2.5-16), then remove the rolled cover
assembly.

Rolled cover

Figure 2.5-16

No. 2D201-102EN*B
143
 (3) Sheet replacement (It is recommended that the entire unit be replaced because the
sheet winding spring is sharp, and can easily cause hand injury.)

Install the new sheet correctly (with respect to the sheet side, winding direction,
and orientation of the fitting).

Before pulling out the sheet along the guide of the rolled cover mounting plate,
wind the sheet one or two times with no load in the direction of the sheet drum
shown in figure 2.5-17. This gives the initial winding force to the roller.

Attach the sheet to the fitting

with double-sided tape Smooth side of the sheet

Take-up direction
Fitting Cloth side of the sheet

Wind the sheet one or

Rolled cover fitting two times with no load

Attach the sheet to the roll

Sheet drum with double-sided tape

Figure 2.5-17

(4) Reverse the above steps (2) and (1) to remount the rolled cover assembly on the
upper frame.

To insert the sheet between the couch top under cover and the chain cover guide
with ease, move the couch top to the OUT limit.

No. 2D201-102EN*B
144
2.5.4 Replacing the hydraulic unit
The procedures for replacing the hydraulic unit if it malfunctions are described below.

Since this work involves the handling of heavy objects, carefully review the replacement
procedures in advance.

2.5.4.1 Preparation
Time required: 2 hours (Two workers are required because the hydraulic unit is heavy
and the hose must not be allowed to bend.)

Materials and tools required

• 2 straps (3 m), 2 support bars (50 mm ( 50 mm ( 600 mm), Phillips screwdriver (No. 2,
medium size), hexagonal wrenches (3 mm, 5 mm), hammer, punch, screw-locking
compound, wire nipper, file

• The hydraulic unit supplied by the factory

2.5.4.2 Removing the hydraulic unit

(1) Raise the patient couch to the UP-LIMIT position.

(2) Remove the front and rear base covers.

(3) Release the lower edge of the bellows and bind it to the upper frame with the
straps (figure 2.5-18).

(4) Place the support bars at the specified locations and lower the patient couch until it
is supported by the support bars (figure 2.5-19).

(5) After confirming that the patient couch cannot be lowered any farther (the couch is
securely supported by the support bars), turn OFF the power of the CT system.

(6) Remove the clamps of the hydraulic hose ("a" in figure 2.5-19). Disconnect the
connector ("b" in figure 2.5-19).

(7) Remove the screws (M4 × 4) for securing the motor pump/oil tank (figure 2.5-20).

(8) Remove the setscrews (M6 × 2) ("b" in figure 2.5-21) of the shaft located at the
bottom of the cylinder ("a" in figure 2.5-21) to pull out the shaft ("c" in figure 2.5-21).

(9) Remove the bolts (M6 × 2) ("d" in figure 2.5-21) from the upper part of the cylinder
while holding the cylinder firmly to remove the cylinder.

(10) One worker should hold the cylinder and another worker should hold the tank and
pump in order to remove the hydraulic unit from the patient couch.

No. 2D201-102EN*B
145
 Up rail Outer arm
Inner arm

Upper Strap
frame
Bellows b

Support bar
Down rail a

Figure 2.5-18 Figure 2.5-19

Securing screws d
(4 locations) Pump e

b
c

Oil tank

Figure 2.5-20 Figure 2.5-21

No. 2D201-102EN*B
146
2.5.4.3 Mounting the hydraulic unit

CAUTION: Be extremely careful when handing the hydraulic hose. The hydraulic hose
is very fragile (minimum permissible bending radius: 45 mm). If the hose is
bent, it will be permanently damaged and can no longer be used.

(1) Use the file to remove any burrs caused by the setscrews of the shaft located at the
bottom of the cylinder.

(2) Insert the shaft at the bottom of the cylinder using only one spacer.

(3) Strike the shaft after placing another spacer over the shaft to insert the cylinder
(figure 2.5-24).

Inner arm Cylinder upper block Confirm that there is

no interference.
Pressing screw

Shaft Secure the shaft

Pipe
using the pressing b
screw so that X and
Y shown in figure
L11 a
2.5-22 are the same.

X Y c

DOWN-LIMIT status

Figure 2.5-22 Figure 2.5-23

(4) Hold the pump ASSY and the oil tank together and secure them with screws at the
specified position (figure 2.5-20).

(5) Turn ON the power of the CT system, connect the connector ("b" in figure 2.5-19),
and press the UP movement switch to extend the cylinder ram to a point before the
ring.

(6) Rotate the ram to adjust the fixing hole position so that the fixing hole is aligned with
the ring tap (figure 2.5-26).

(7) Extend the cylinder ram while adjusting the block angle so that the upper end of the
ram and the ring are horizontal.

(8) When the cylinder ram is pressed against the upper frame, remove the two support
bars, insert the bolts into the ring tap section, and tighten them.

(9) Secure the shaft located at the bottom of the cylinder using the setscrews. (Use
screw-locking compound.)

(10) Route the cables and the hose as they were originally.

(11) Remove the straps from the bellows. Repeat couch up/down movement between
the UP-LIMIT position and the DOWN-LIMIT position about 10 times. This removes
air in the hydraulic unit and also allows interference etc. to be checked.

No. 2D201-102EN*B
147
CAUTION: If the cables in the patient couch interfere with the solenoid valve, the
solenoid valve may be damaged and the couch may be lowered
unexpectedly. Make sure that the cables do not interfere with the solenoid
valve.

Shaft
Spacer Block
Hole Ring
Ram

Figure 2.5-24

b
a

Figure 2.5-25 Figure 2.5-26

No. 2D201-102EN*B
148
2.5.4.4 Checks
(1) Check the UP movement speed and the DOWN movement speed referring to the
service manual.

(2) Confirm that there is no oil leakage from the hose joint section etc.

(3) Remount the covers.

No. 2D201-102EN*B
149
2.6 Adjustments and Cleaning
2.6.1 Adjustment of vertical motion speed
The speed of lowering the couch can be controlled by the solenoid throttle valves L21
and L24. In this case, their openings must be identical. First, loosen the locking nut of
L21, fully close each valve, mark the fully closed position on each valve, then open the
valves at the same rate.

Solenoid throttle
valve (L21/L24)
Left : Faster
Right: Slower
L24
Right
Left
Knob
Locking nut
L21 (Provided for L21 only)

Figure 2.6-1

NOTE: 1. The knob will come off after being turned about nine times.
The couch top lowering speed is actually increased only for the first two
turns of the knob. The speed is not increased even if the knob is turned
more than two times. Therefore, do not turn the knob more times than
necessary.

2. The lowering speed depends upon the temperature of the oil in the
hydraulic system and the load (23 seconds from the UP-LIMIT to the
DOWN-LIMIT with a 65 kg load at a room temperature of 20 degrees C).

CAUTION: Be careful not to be crushed by the upper frame when working

on the parts inside the lifter arms. Do not leave the knob
detached from the valve.
If the solenoid valve is opened in this status, the oil will leak
from the knob hole. Be sure to tighten the locking nut of the
knob after adjusting the speed. (Turn the nut clockwise to
tighten.)

No. 2D201-102EN*B
150
2.6.2 Changing the vertical stop positions
This section describes procedures to change the vertical stop positions of the patient
couch (for safety). Vertical stop positions are determined by the positions of the
photosensors.

<Work procedure>

(1) Remove the top back cover A of the patient couch and locate the vertical stop
photosensors. The couch top heights are initially determined by these
photosensors as shown below.

Photosensor

PHC21 Upper Limit (UP)

PHC26 Height-0

PHC23 Height-1
PHC24 Height-2

874
732
PHC25 Auto-Stop

692
687
407
PHC22 Lower Limit

302
(DOWN)

Figure 2.6-2

No. 2D201-102EN*B
151
 (2) The photosensors are arranged as shown below. Select the sensor corresponding
to the vertical stop position you want to change (Height-0, position at which the
couch top downward movement is inhibited to prevent interference with the tilted
gantry; Height-1, position at which downward movement is inhibited because the
couch top is inserted in the gantry; Height-2, position at which inward movement is
inhibited because the couch top is too low; UP limit and DOWN limit; Auto-Stop,
position at which the couch stops temporarily while the couch top is moving
downward from the scanning position), loosen its fixing screw, and move the
sensor in the indicated direction.

Never move the sensor in the opposite direction. Otherwise, trouble will occur.

Auto-Stop

Lower Limit (DOWN)

Height-2
Height-1

Height-0

Upper Limit (UP)

Figure 2.6-3

2.6.3 Adjustment of horizontal motion speed

Horizontal movement is performed with the AC servo motor. Its speed is controlled by
the slide servo amplifier under the couch vertical movement mechanism. The
parameters for the servo amplifier are already set. In most cases, the servo amplifier
does not need to be adjusted. For setting values of each parameter and check
procedures, refer to subsection 3.9.5 "Patient Couch Sliding Servo Amplifier" of
section 3 "Gantry/Couch Control Section".

No. 2D201-102EN*B
152
2.6.4 Adjustment of gear backlash of the horizontal drive unit
This section describes procedures to adjust the backlash in the combination of the
horizontal drive unit, the clutch brake gear, and the drive sprocket gear.

Screws

Clutch brake gear

Backlash adjustment screw

Drive sprocket gear

Figure 2.6-4

Loosen six mounting screws (M6), then push back the horizontal drive unit to increase
the backlash or pull the horizontal drive unit to reduce the backlash with the backlash
adjustment screw.

NOTE: When backlash is optimal, the couch top moves 0.05 mm to the “IN-OUT”
direction when the couch top moving frame is moved to the “IN-OUT”
direction. If backlash is too high, a stop position error is generated.
If backlash is too low, movement becomes heavy and gear wear is increased.

No. 2D201-102EN*B
153
2.6.5 Adjustment of the couch top supporting roller
This section describes procedures to adjust the height of the couch top supporting
rollers (these eliminate unwanted couch top flexing) and to ensure smooth movement of
the couch top without swaying.

<Work procedure>

(1) Move up the couch top to the scanning position and setscrews "a" to "d" and the
couch top supporting roller A so that the top is fully levelled longitudinally. (Check
that the top is well-levelled using a spirit level.) (During this work, the couch top
supporting roller B should be lowered in advance.) See step (4) for adjustment of
setscrews "a" to "d".

ÎSee step (4) for

adjustment of setscrews
"a" to "d".

Top fixing bolt (2-M12)

Setscrews "a" Setscrews "c"

Couch top and "b" (2-M10) and "d" (2-M10)
Spirit level
supporting Couch top
roller A Couch-top
movement
frame

Setscrews "e"
and "f" (2-M6)
M6 roller section Couch top supporting roller B
setscrews used in double

Note: Setscrews "a" to "f" are installed two per hole to prevent loosening.

Figure 2.6-5

Setscrew "d" Setscrew "e"

Setscrew "f"
Setscrew "a"

Setscrew "c"

Setscrew "b"

Figure 2.6-6

If the couch top touches the cover or the couch top is not properly levelled, turn the
setscrews "a" to "d" to correct the problem (usually the couch top is 2 mm above
the top slide frame).

No. 2D201-102EN*B
154
(2) Adjust the height of the couch top supporting roller B as shown below.

Couch top supporting roller B

M6 Double
setscrews

Figure 2.6-7

Lift up roller B until it touches the back of the couch top and fix it. Move the couch
top from one end to the other end and make sure that the couch top moves
smoothly, with no sway along the entire stroke.

(3) Move the couch top 100 mm or more inwards from the OUT limit, tighten the top
fixing bolts firmly. Then move the couch top from one end to the other end, and
make sure that the couch top moves smoothly, with no sway along the entire
stroke.

(4) Adjustment of the couch top level and elimination of couch top sway

(a) Adjustment of the longitudinal level of the couch top

Î See figure 2.6-5.

Set screws
Travel frame

Couch top a, b c, d

Tighten the setscrews

"a" and "b" or loosen
the setscrews "c" and
Top supporting rollers "d".

The far end of the

couch top is raised.

Figure 2.6-8

No. 2D201-102EN*B
155
 (b) Adjustment of transverse level of the couch top

b, c a, d

Tighten the setscrews Tighten the setscrews

"b" and "c" or loosen the "a" and "d" or loosen the
setscrews "a" and "d". setscrews "b" and "c".

Figure 2.6-9

(c) Adjustment to eliminate couch top sway

Couch top Travel frame

Tighten bolt "f" or
loosen bolt "e".

e
Setscrews
f

Tighten bolt "e" or loosen bolt "f".

Î See figure 2.6-6.

Figure 2.6-10

2.6.6 Maintenance and inspection of the clutch/brake assembly

2.6.6.1 Maintenance procedure

<Work procedure>

(1) This clutch/brake assembly is a dry type. Therefore, never allow oil etc. to
contaminate the friction surface.

(2) The friction surface of the clutch is gradually abraded as it is used and the clearance
between the armature assembly and the rotor assembly is increased. If the
clearance exceeds 0.5 mm, operation failure or suction failure will result. In this
case, return the clutch/brake assembly (VEP 0.6-01) to Nasu Works.

(3) With regard to the retaining brake, long-term use will abrade it slightly due to
contact of the disk during idle rotation. However, this is not abnormal.

(4) Periodically confirm that the mounting bolts, small screws, etc. are not loose.

(5) If it is necessary to release the brake in the case of a power failure or electrical
problem, use the release lever. At this time, note that the standard stroke (less
than 5°) and release force (less than 60 N) must be observed when operating the
lever. Failure to do so will apply excessive force to the lever, the arm section, etc.,
resulting in bending of the release lever. If lever is bent, the brake cannot be
released.
Before turning ON the power of the system, confirm that no force is applied to the
release lever.

No. 2D201-102EN*B
156
2.6.6.2 Inspection procedure
If any of the abnormalities described below is noted, perform the corresponding check
procedures.

If the clutch slips

(1) Is there oil, foreign matter, or another contaminant on the friction surface?

(2) Is the energizing voltage low? (It must be 22 to 26 VDC.)

(3) Is excessive load applied to the system? (Couch-top IN/OUT manual operation
must be possible with a force less than 147 N.)

If the brake slips

(1) Is there oil, foreign matter, or another contaminant on the friction surface?

(2) Is excessive load applied to the brake? (When the power is turned OFF, IN/OUT
movement must not be possible at a force of 196 N.)

(3) Is the temperature of the brake excessively high? (It must be 100°C or less.)

(4) Is the brake released by the release lever?

If the clutch/brake does not operate normally

(1) Is the energizing voltage low? (It must be 22 to 26 VDC.) Are there any
abnormalities in the power, circuit, switches, etc.?

(2) Is the clearance increased due to abrasion of the friction surface? (The clearance
must be 0.5 mm or less.)

(3) Is temperature of the clutch or brake excessively high? (The temperature must be
100°C or less.)

If the clutch/brake assembly overheats

(1) Is the energizing voltage too high? (It must be 26 VDC or less.)

(2) Do the brake and the clutch (drive) operate simultaneously due to an abnormality in
the circuit, switches, etc.?

If the clutch or brake does not operate at all

(1) Is the rated voltage applied to the clutch or brake? (It must be 22 to 26 VDC.)

(2) Is the coil or lead wire of the clutch or brake damaged or disconnected?

(3) Does the clearance exceed the limit due to abrasion of the friction surface? (The
clearance must be 0.5 mm or less.)

(4) Are there any abnormalities in the circuit, switches, etc.?

No. 2D201-102EN*B
157
2.6.7 Adjustment of belt tension
Press the push-pull gauge around the center of the belt between the speed reducer and
clutch brake <1>, and between the speed reducer and motor <2>. If the deflections are
within the following ranges, they are adequate. If not, adjust the tension as described
below.

<1> Between the speed reducer and clutch brake : 1.8 ±0.2 mm/7 N (0.7 kgf)

<2> Between the speed reducer and motor : 2.3 ±0.2 mm/2 N (0.2 kgf)

Motor

<2>
Belt between the
speed reducer
and motor
Clutch
brake

Reducer
<1> Belt between the speed
reducer and clutch brake

Figure 2.6-11

No. 2D201-102EN*B
158
<Work procedure>

(1) Adjustment of belt tension between the speed reducer and clutch brake

Loosen the three screws that secure the speed reducer. Move the speed reducer
right or left with the belt-tension adjusting bolt.

Belt tension
adjustment bolt

Speed reducer mounting plate

Loosen these three screws.

Figure 2.6-12

(2) Adjustment of belt tension between the speed reducer and motor

Loosen the three screws that secure the motor. Move the motor right or left with
the belt-tension adjusting bolt.

Motor mounting plate

Belt tension
adjustment bolt

Loosen these three screws.

Figure 2.6-13

No. 2D201-102EN*B
159
2.6.8 Adjustment of chain tension
The tension of the chain should be in the specified range as accurately as possible to
ensure precise horizontal stop motions.

<Work procedure>

Remove bottom covers R and L and the flexible cover on the upper frame. The chain is
visible at the right side of the couch (facing the gantry).

Push the chain at the notch in the frame about 780 mm from the rear edge of the frame
(or about 845 mm from the rear edge if the main cover), with 20 ±2N (2 ±0.2 kgf) using
a push-pull gauge (or a spring balance). (Pull the chain when using a spring balance.)
When the deflected chain reaches the upper part of the rib square hole of the frame, the
tension is appropriate. If the chain deflection does not satisfy this condition, adjust the
tension of the chain as follows:

(1) Measure the tension of the chain at the notch in the frame.

d = Until the chain

reaches the upper
part of the square
F = 20±2N (2±0.2 kgf)
90 960 T sprocket
Chain Chain-tension adjusting bolt

D sprocket
F

Figure 2.6-14

No. 2D201-102EN*B
160
(2) If the tension of the chain is not in the preset range, adjust it as follows:

Remove the bottom cover R and loosen the two M6 bolts mounting the T sprocket.
(Do not remove the bolts.)

T sprocket mounting
bolt 2-M6

Chain tension
adjusting bolt M6

3-M4

Bottom cover R Cap

Mounting screw

Figure 2.6-15

(3) Turn the chain-tension adjusting bolt to adjust.

To release: Turn the bolt

counterclockwise.
To tighten : Turn the bolt clockwise

Left Right Bottom cover L

Figure 2.6-16

(4) Temporarily tighten the T sprocket mounting bolts and measure the tension of the
chain again. If the chain tension is not in the specified range, repeat the above
steps until the proper chain tension is obtained.

(5) When the chain tension is satisfactory, tighten the mounting bolts firmly and
remount the cover.

No. 2D201-102EN*B
161
2.6.9 Routing of the internal cables

<Work procedure>

(1) Remove the couch top and couch top under cover A.

(2) Remove the lower front cover, jig cover, flexible cover, couch top under cover B,
and horizontal movement drive cover according to where the cables are to be
routed.

(3) Clamp a and b in the link and c in the top frame and bind the cables to the front
welding pipe with a cable tie. The diameter within the cable tie must be two or
three times the thickness of the cables and the cables must have freedom of
movement in the lateral direction.
(Use the already attached band as a cable tie.)

(4) Perform UP and DOWN operation for the patient couch at full-stroke and confirm
that no tension is exerted on the cables at the UP limit. Confirm that there is no
interference between the cables and the electromagnetic valve L24 at the DOWN
limit. Clamp the cables at <b> and <c> and bind them with cable ties and eliminate
movement.

Pipe b

L24 a

Cable routing at the DOWN limit Cable routing at the UP limit

Figure 2.6-17

Welding pipe
Clamp Cables
Link

Cable tie
Cable tie
Internal cables

Ring of the
cable tie large enough for the
bundle to move

Figure 2.6-18

No. 2D201-102EN*B
162
2.6.10 Resetting the overcurrent relay
When an overcurrent flows, the overcurrent relay prevents the motor from smoking and
burning. When the overcurrent relay functions, reset it as described below.

* Before resetting the overcurrent relay, it is necessary to check whether the circuit is
shorted or the drive unit is locked (a foreign substance is caught, etc.). Resetting the
overcurrent relay without determining and correcting the cause of the overcurrent is
dangerous.

(1) Overcurrent relay for the horizontal drive motor

(a) Remove the front cover of the lower section of the couch, and the jig cover
between the gantry and the couch, so that the circuit protector (CP51) can
be seen.

(b) Turn the lever of CP51 to the ON side and reset the relay.

Front cover

Reset

Jig cover

Figure 2.6-19

(c) After reset is performed, check the horizontal movement operation. If the
overcurrent relay is not triggered again, attach the cover.

No. 2D201-102EN*B
163
(2) Overcurrent relay for the vertical movement motor

(a) Remove the check window of the lower cover (cap and M4 screw) so that
the overcurrent relay can be seen.

Upper cover

Check window

Overcurrent relay

Lower cover

Figure 2.6-20

(b) Turn the switch of the overcurrent relay to the ON side from the check
window and reset the relay.

Reset

Figure 2.6-21

(c) After reset is performed, check the vertical movement operation. If the
overcurrent relay is not triggered again, attach the check window.

No. 2D201-102EN*B
164
3. Gantry/Couch Control Section
3.1 General Outline
The gantry and couch control is composed of several PWBs (KGTSM PWB, OPCONT2
PWB, etc.) and related units.

The core of the control section, the KGTSM PWB, provides status information of
detailed errors, interlocks, etc. This information can be seen on the personal computer
(monitor).

This information can be used in combination with checks using LEDs etc. to identify
trouble areas, and perform countermeasures.

3.2 Control Section Outline, Location, and Configuration

3.2.1 Outline
The control section is located inside the gantry and the patient couch.
The control section is designed to control operation of each of the drive sections of the
gantry and patient couch as well as data acquisition according to operation requests
from the console, the gantry operating panel, and the maintenance panel in the KGTSM
PWB.

3.2.2 Location
Figure 3.2-1 is a block diagram of the system. The control section is shaded.

No. 2D201-102EN*B
165
 Wedge XC HFG X-ray tube Oil cooler

: Control section
Slit
REF detector
OPCONT2 DAS SSD
FMD
Beam
trimmer Gantry rotation
section
DAS power electrical
Laser projector supply components
(Internal and
median RMUDAT
projector)
(LPBM,RPDM,PPDM)
LCSR
Gantry (POWER)
No. 2D201-102EN*B

SMUDAT
(LPBM,SPDM,PRDM) Position Gantry
sensor stationary
166

Console Rotation Servo motor section

(120 °) electrical
servo amp Encoder components
Control GCIF2
PWB
Tilt encoder Tilt motor
GPR KGTSM Power
(operating panel)
Tape,mat SW sequence
Microphone GPL section
/Speaker (operating panel)
Door switch
Footswitch Slice counter
KGTSP X-ON lamp
(option) Patient guide Tilt microswitch

POWER CONT

Solenoid valve
Couch SI Pump motor (for Slide servo
(for moving Slide motor
(for interlock) moving upward) (IN/OUT)
downward)

Figure 3.2-1 Block diagram of the system

3.2.3 Targets of control
This subsection outlines the items (functions) controlled by the control section. The
drive section (motion control) and data acquisition section are subject to control.

Table 3.2-1 Control target, function, outline

(1) Functions of the gantry stationary section

No. Function name Outline

1 Gantry rotation 0.75 s, 1 s, 1.5 s/rotation (continuous rotation)
Slow rotation (60 s/rotation) stops at any angle.
2 Gantry tilting +30° to -30°, remote operation
3 Data acquisition Control signals [VIEWTRIG, BGN, X-ray ON/OFF]
Data [Gantry position, rotation speed, gantry tilt angle,
acquisition view count, couch position]
4 Operating panel Operation instruction, position information display
5 Maintenance panel Operation instruction (local mode)
6 Optical data transfer Detection of three types of errors
error detection (DAS control data, control data in both directions)
7 Communication with Control command, response, status
the console Serial RS422
8 Patient guide Status display
9 Pre-processing (COM- Operation mode, error detection, status, pre-processing
PRE control)
10 Microphone Voice message (2 pieces, front and rear)

(2) Functions of the gantry rotating section

No. Function name Outline

1 Wedge Step, normal, small, flat (Air Cal.), DR
2 Slit 0.8/1/2/3/5/7/10 mm
3 Beam trimmer 0.8/1/2/3/5/7/10 mm
4 DAS mode setting 8 types
Î Refer to service manual
2D201-103EN.

5 Projector (laser) ON/OFF, automatically extinguished after 2 minutes

(3) Patient-couch control functions

No. Function name Outline

1 Vertical movements UP movement, DOWN movement, auto-stop, remote
operation
2 Horizontal movements IN movement, OUT movement, operation speed, free
movement, remote operation, display clear

No. 2D201-102EN*B
167
3.2.4 Composition and explanation of each Unit
The gantry/couch control section is mainly composed of seven different types of PWBs,
consisting of actuators, detection elements, power elements, relay elements, as well as
cables, etc.

(1) KGTSM PWB

(2) KGTSP PWB

(3) Servo amplifier unit

(4) GCIF2 PWB

(5) OPCONT2 PWB

(6) Operating panels (left and right)

(7) SI PWB

The above units are described hereafter.

3.2.4.1 KGTSM PWB (Kind Gantry Table Sequencer Multi PWB)

The KGTSM PWB plays a central role in the gantry and couch control units.
This PWB is equipped with the service panel.

<Functions>

(1) The KGTSM PWB receives operation requests from the SS/ADI2, the auxiliary
operating panels and the service panel, and checks the contents of the operation
requests and the status of the gantry and couch. It then controls the gantry
stationary unit and the couch and requests the OPCONT2 PWB to operate the
rotating unit of the gantry.

(2) The PWB receives and processes position information coming from the actuators
and the status information of the inside rotor coming from the OPCONT2. It then
sends gantry/couch information to the SS/ADI2 and position information to the
auxiliary operating panels.

(3) The PWB controls the PRE ASIC on the GCIF2.

3.2.4.2 KGTSP PWB (Kind Gantry Table Sequencer Power PWB)

<Functions>

(1) This unit converts control signals (TTL level) output from the KGTSM PWB to
power signals for each actuator and outputs the power signals to the actuators.

(2) This unit controls ON/OFF operation of the X-ON lamp located at the front and rear
of the gantry, the slice counter, and the wall-mounted lamp located at the entrance
of the scanner room.

(3) This unit amplifies the signals from the front microphone and the rear microphone
and sends them to the console.

No. 2D201-102EN*B
168
3.2.4.3 Servo amplifier unit
<Functions>

(1) This unit receives speed signals from the KGTSM PWB and outputs power
proportional to the received speed signals to the rotation AC servo motor in order
to rotate the gantry. At this time, the unit also receives encoder signals from the
AC servo motor to enable control of the gantry rotation speed. (The rotation speed
is controlled so that it always follows the speed signals sent from the KGTSM
PWB.)

(2) This unit informs the KGTSM PWB of the status of the servo amplifier.

3.2.4.4 GCIF2 PWB (Gantry Console Interface 2 PWB)

This PWB serves as an interface between the gantry and the console, has data
transmission functions, and is equipped with the PRE function.

<Functions>

(1) The PWB controls the transmission of all the control signals between the gantry
and the console. The signals to the rotation section are sent to the data
transmission section and the control signals to the stationary sections such as
KGTSM are sent to the corresponding PWBs.

(2) The PWB controls and adds extra data from KGTSM.

(3) The PWB pre-processes the acquisition data.

3.2.4.5 OPCONT2 PWB (Optics Controller 2 PWB)

This PWB is used to control gantry optics and the positioning projectors in the gantry
rotating section. It also serves as an interface for data transmission.

<Functions>

(1) This PWB receives operation requests (serial data) of the X-ray beam control units
from the KGTSM PWB through the optical transmission system and it controls
these units according to the contents of the requests.

(2) Information of the slit and other control components in the rotating unit is sent as
serial data to the KGTSM PWB.

3.2.4.6 Auxiliary operating panels

These panels are located at the right and left of the front gantry cover and are used to
operate the gantry and the couch.

3.2.4.7 SI PWB
This PWB is located under the rear base cover of the couch.

<Function>

This PWB converts couch sensor information to drive signals and outputs the signals to
the KGTSM PWB.

No. 2D201-102EN*B
169
 Internal projector

Mode setting (D) Laser (median, side, oblique)

DAS
Control signal (P) Note:
OPCONT2 PWB Slit: 1 channel
Reference sensor signal Slit, wedge, beam trimmer Wedge: 1 channel
X-ray ON/OFF (D) Beam trimmer: 2 channels
XC Reference
Pulse motor
sensor
Operation request, X-ray
ON/OFF, Gain setting Gantry rotating
(SERIAL, D) section

Gantry stationary
section
GCIF2 PWB Optical data Reference sensor information
Position sensor Rotation section
sensor
(Partial processing) Control (D) Control AC servo motor Encoder
Speed (A) signal Servo amp signal (P)
Response, internal
information of the rotation Servo information section Rotation information
section (SERIAL, D) (PG output)
SW information Gantry tilt

170
KGTSM PWB Tilt angle information (D:Absolute value)
Footswitch Encoder AC motor
Control signal (D)
(option)
Control signal Patient guide X-ray exposure display
Operation request (SERIAL)

No. 2D201-102EN*B
(POWER) lamp
SS/ADI2 PWB
Response, KGTS information (SERIAL) Control signal (POWER)
Servo Slice counter
Console information KGTSP PWB Control signal (POWER)
Operation request (BUS)

Maintenance panel
Horizontal sensor
Panel display (D) (in the KGTSM PWB) Patient information Position Patient couch
couch Patient couch Horizontal movement sensor horizontal movement
SW information (SERIAL, D) information (D) information
(PG output) Encoder AC servo motor

SI PWB
Patient couch vertical movement
Operating panel Vertical sensor
information Position
(left/right) UP:AC motor
sensor
Height information (A) DOWN:
Volume Solenoid valve

Figure 3.2-2 Detailed composition of the control section

3.2.5 Control flow
Control of the gantry and the couch is started when the KGTSM PWB receives
operation requests from the console, the operating panel, or the maintenance panel.

The control flows of the drive units Î Refer to figure 3.2-3.

The control flows of data acquisition Î Refer to figure 3.2-4.

The KGTSM PWB has a safety detection function. When this PWB detects an error, it
stops operation immediately or disconnects the 200 V power line.

Right operating Maintenance panel

Console Left operating panel panel KGTSM
SW information
Foot SW (option)
(Patient couch UP/DOWN)

Operation request Operation request

Response
KGTSM PWB [Judgement, processing]

Rotation section internal operation request

Control signal
Response
Data transfer section
Response Control (via GCIF2, MUDAT)
signal
Response
Servo amplifier GTS power unit Servo amplifier [Judgement,
OPCONT2 PWB
unit KGTSP PWB unit processing]

Sensor

Sensor
Sensor
horizontal movement

vertical movement

Internal projector
Beam trimmer
Gantry rotation
Patient guide
Gantry tilting

DAS HFG
Patient couch
Patient couch

Wedge

Slit

Figure 3.2-3 Drive section operation control flow

No. 2D201-102EN*B
171
Control register SS/ADI2
Number of bundled channels PWB
Whether or not processing is
performed [decode, offset correction, Response Acquisition request
log conversion/reference correction]
KGTSM
PWB
(1) Status information
(2) Error information
VT signal, BGN signal
(1) VIEWTRIG [Acquisition pulse]
(2) BGN ON/OFF [Acquisition start/end]
X-RAY ON/OFF

(1) Gantry position data (12bit)

(2) Gantry speed data (16bit)
(3) Patient couch position data (16bit)
(4) Acquisition projection data (16bit, 2word)
(5) Gantry tilt data (10bit)
GCIF2 PWB
Error processing
GCIF2 PWB
Added to image
data as extra
data.
MUDAT

Data transfer error

If an error occurs,
PRE section X-ray generation is
stopped. OPCONT2 PWB
(COM-PRE; ASIC)
Error processing
Extra data
(1) Gantry position (Word #1)
(2) Gantry speed (Word #2)
(3) Patient couch position
(Word #3) Pure raw data (16bit, 768ch)
(4) Acquisition projection
DAS
(Word #6, 7)
(5) Gantry tilt data
(6) ECG data
(7) Communication error
information
XC PWB
Raw data (16bit, 800ch)

SHIF PWB

Figure 3.2-4 Data acquisition control flow

No. 2D201-102EN*B
172
3.2.6 Interlock
The gantry/couch control section has the following interlock functions.

(1) Gantry/couch movement interlock [to ensure the safety of the patient and to protect
the system from damage]

The following operations are immediately stopped and disabled depending on the
relationships between gantry tilting, couch vertical movement, and couch-top
horizontal movement or when a pressure-sensitive switch is activated.

• Gantry tilting, couch vertical movement, couch-top horizontal movement, X-ray

exposure

(a) The interlock position of each movement is shown in figure 3.2-5.

(b) Drive operation interlocks are described in table 3.2-2.

(c) Interlocks related to X-ray exposure are described in table 3.2-3.

(2) Gantry cover interlocks

When the gantry front cover is opened, gantry rotation is disabled.

If the gantry rotation disable status is forcibly released (cover switch ON), a lamp
blinks.

(3) Disabling simultaneous operation using the left and right operating panels [to
ensure the safety of the patient and the operator]

If the left and right operating panels are used simultaneously, all operations
performed using the operating panels are stopped or disabled immediately.

(4) Disabling a command of simultaneous movement in the opposite directions [to

ensure the safety of the patient]

If gantry tilting, couch-top horizontal movement, or couch vertical movement in the

opposite directions is specified simultaneously, the corresponding movement
functions are stopped immediately.

(5) Control priority interlock [to ensure the safety of the patient, the operator, and
service personnel]

The priority of control instructions is as follows:

[First priority] Maintenance panel on the KGTSM PWB

[Second priority] Gantry operating panel

[Third priority] Operation from the console

(a) During movement using the maintenance panel

• No movement commands from the gantry operating panel are accepted.

• No movement commands from the console are accepted either.

No. 2D201-102EN*B
173
 (b) During movement using the gantry operating panel

• When the maintenance panel is used: Movement using the operating panel
stops immediately. Then, movement from the maintenance panel starts.

• No movement commands from the console are accepted.

(c) During movement performed by console operation

• When the maintenance panel is used: Gantry rotation slows down and
stops at the TOP position.
Other movements stop immediately. Then, movement from the
maintenance panel starts.

• When movements are performed from the gantry operating panel:

Movements which do not conflict with each other such as PAS setting start
simultaneously. Remote operations (tilting, couch vertical movement,
couch-top horizontal movement) stop even if they do not conflict with each
other.

(6) Tube rotor interlock [to protect the tube rotor from damage]

If tube acceleration and gantry rotation acceleration occur simultaneously, gantry

tilting is disabled.

No. 2D201-102EN*B
174
 Gantry tilt operation

(+TILT) (-TILT)
(UP)

Couch horizontal
Couch vertical movement
(IN) (OUT)
movement

REAR MAT SW
(DOWN)
61 UP LIMIT 305
11 50 237 68 11
Height display : 182
IN LIMIT OUT-2 OUT LIMIT
1463
Mechanical
IN-1 Height display : 0 stopper
No. 2D201-102EN*B

Mechanical
OUT-1
stopper

915
773
AUTO STOP
175

733
HEIGHT-0
HEIGHT-1
HEIGHT-2
REAR TAPE SW FRONT TAPE SW

728
DOWN
LIMIT

448
343
TILT - MICRO-SW Mechanical stopper (+31.75° to +32.25° ) Unit: [mm]
(-30.75° to -31.25° ) TILT + MICRO-SW (+30.75° to +31.25° )
TILT -30° TILT +30°
: Tape, mat SW
: Vertical movement system sensors
TILT+POSITION : Horizontal movement system sensors
: Tilt operation system sensors
NOTE: During tilting in the (-) direction, the weight : Mechanical stopper
of the gantry acts as a counterbalance.
Therefore no mechanical stopper is provided.
(If the self-lock mechanism of the motor does
not function, the gantry will only be tilted in
the (+) tilt direction.)

Figure 3.2-5 Interlock positions

 Table 3.2-2 Operation interlocks

{: Possible movement ×: Impossible movement Δ: Movement with restrictions

Interlock + tilting - tilting IN movement OUT movement UP movement DOWN movement Free movement
1 Front tape SW × { × { { × {
2 Rear tape SW { × × × { × {
3 Rear dome mat × × × × × { {
SW
4 IN⋅LIMIT { { × { { { {
5 IN-1 { { Δ *6 { { { {
6 OUT-2 { { { Δ *1 { { {
7 OUT-1 { { { Δ *1 { { {
8 OUT⋅LIMIT { { { × { { {
9 UP⋅LIMIT { { { { × { {
No. 2D201-102EN*B

10 HEIGHT-0 ΔPossible up to +28° ΔPossible up to -20° { { { Δ *2 {

11 HEIGHT-1 ΔPossible up to +28° ΔPossible up to -20° { { { Δ *3 {
ΔPossible up to +0.5° ΔPossible up to -10° × { { Δ *3 Δ *5
176

12 HEIGHT-2
13 AUTO⋅STOP ΔPossible up to +0.5° ΔPossible up to -10° × { { Δ *4 {
14 DOWN⋅LIMIT ΔPossible up to +0.5° ΔPossible up to -10° × { { × {
15 TILT [-20.5 to -30] { { { { { ΔPossible up to HEI-0 {
16 TILT [+28.5 to +30] { { { { { ΔPossible up to HEI-0 {
17 TILT+POSITION { { { { { ΔPossible up to HEI-1 {
18 TILT+30 × { { { { ΔPossible up to HEI-0 {
19 TILT-30 { × { { { ΔPossible up to HEI-0 {
20 TILT ±μ SW Power units of the gantry stationary section and the gantry: 200 V OFF (disabling gantry rotation, gantry tilting, couch horizontal movement,
and couch vertical movement)

*1 : OUT movement from the console is impossible.

*2 : DOWN movement is possible only when the tilt angle is within the range from -20° to +28°.
*3 : DOWN movement is possible only when the tilt angle is within the range from 0° to -10° at the OUT-1 position.
*4 : Movement is possible by pressing the pause operation button again.
*5 : Free movement is disabled temporarily when the interlock is triggered from the UP direction.
*6 : For OUT movement performed from the console in FAST mode, the couch top slows down and then stops.
 Table 3.2-3 Interlocks related to X-ray exposure

Interlock in which X-ray generation is interrupted or not performed

[1] If couch-top horizontal movement is stopped by an interlock after the START

button ( ) is pressed on the keyboard

(a) If X-rays are being generated, X-ray exposure is stopped immediately

(during scanoscopy or helical scan).

(b) If X-ray generation has not yet started, X-rays will not be generated (while
moving to the next slice after scanoscopy, helical scan, or routine scan).

[2] If something comes into contact with a tape switch

[No interference occurs during normal operation because of the gantry/couch

movement interlock mechanism. This is provided assuming a single fault or
special operation by free movement.]

(1) During couch-top horizontal movement: Included in [1] above.

(2) Movements other than couch-top horizontal movement:

(a) If contact occurs during X-ray exposure, X-ray generation does not
stop until acquisition of the current slice is completed. However,
processing does not proceed to the next slice.

(b) If contact occurs before X-ray exposure starts, X-rays are not
generated.

No. 2D201-102EN*B
177
3.2.7 List of fuses used for the gantry
(1) Gantry stationary section fuses

Mounting
No. Fuse No. Rating Type Line used Model
location
1 F111 1A 250 V Time lag DC power supply ASF041 * 1A
(PS111), Timer
2 F112 1A 250 V Time lag DC power supply ASF041 * 1A
(PS111), Timer
3 F114 7A 250 V Time lag DC power supply ASF041 * 7A
(PS380,PS381)
4 F115 7A 250 V Time lag DC power supplies ASF041 * 7A
(PS380, PS381)
5 F116 7A 250 V Time lag Couch vertical ASF041 * 7A
movement and tilt Figure 3.2-6 <1>
motor, slide
6 F117 7A 250 V Time lag Tilt motor, slide ASF041 * 7A
7 F118 7A 250 V Time lag Couch vertical ASF041 * 7A
movement and tilt
motor, slide
8 F325 5A 250 V Time lag Rotation servo ASF041 * 5A
control line
9 F326 1A 250 V Time lag Rotation brake ASF041 * 1A
10 F327 1A 250 V Time lag Rotation brake ASF041 * 1A

(2) Gantry rotation section fuses

Mounting
No. Fuse No. Rating Type Line used Model
location
1 F743 5A 250 V Normal Temperature ASF016-12
controller and solid
state detector
Figure 3.2-6 <2>
2 F744 5A 250 V Normal Temperature ASF016-12
controller and solid
state detector

No. 2D201-102EN*B
178
 (3) KGTSP PWB fuses

Mounting
No. Fuse No. Rating Type Line used Model
location
1 F1 2A 250 V Normal Tilt motor and ASF016 *
brake 2A250V
2 F2 2A 250 V Normal Tilt motor ASF016 *
2A250V
3 F3 2A 250 V Normal Tilt motor and ASF016 *
brake 2A250V
4 F4 1A 250 V Time lag Couch DOWN ASF041 * 1A
movement
5 F5 1A 250 V Time lag Couch DOWN Figure 3.2-6 <3> ASF041 * 1A
movement
6 F6 2A 250 V Time lag Couch slide brake, ASF041 * 2A
clutch
7 F7 1A 250 V Time lag Patient guide ASF041 * 1A
8 F9 1A 250 V Time lag (External ASF041 * 1A
projector): Not
used
9 F10 1A 250 V Time lag Wall-mounted lamp ASF041 * 1A

(4) OPCONT2 PWB fuses

Mounting
No. Fuse No. Rating Type Line used Model
location
1 F1 3A 250 V Time lag Slit/Wedge motor ASF041 * 3A
2 F2 3A 250 V Time lag Beam trimmer ASF041 * 3A
motor Figure 3.2-6 <4>
3 F3 2A 250 V Time lag Internal positioning ASF041 * 2A
projector

No. 2D201-102EN*B
179
 <1> Gantry stationary section and
fuses in the servo unit (F111,
F112, F114 to F118, F325 to
F327) Front view of the gantry Rear view of the gantry

Servo unit GTS chassis

X-ray tube
No. 2D201-102EN*B
180

R.POWER PWB
chassis chassis

<3> KGTSP PWB fuses

(F1 to F7, F9, F10)
<2> Fuses at the gantry at the rear of the
<4> OPCONT2 PWB
rotation section KGTS PWB
fuses (F1, F2, F3)
(F743, F744)

Figure 3.2-6 Mounting location of the gantry fuses

3.2.8 Gantry power-supply sequence
The gantry power-supply sequence diagram is shown in figure 3.2-7.

For each protector position, breaker section, and the power connection sequence, refer
to figure 3.2-7.

The gantry power-supply sequence is as follows:

(1) When the internal power-supply ON LED is lit, this indicates that power is
supplied to some parts of the gantry.

• While this LED is lit, the power-supply ON of the console will function.

(2) When the power switch of the console is turned ON

• Power is supplied to the entire gantry (rotation section and stationary section).
(MC111, MC112, and MC113 are turned ON.)

(3) When the power switch of the console is turned OFF

• The gantry stationary section is turned OFF simultaneously (MC111 and MC112
are turned OFF).

• The gantry power-supply timing chart is shown in figure 3.2-8.

<1> Connected mode:

When the short connector S-CNN is connected to CNN117.

• When the DAS timer is OFF

The off-delay timer turns OFF MC113 after 1 hour, resulting in power
shutdown of internal units of the gantry rotation section.

• When the DAS timer is ON

The power of the internal units of the gantry rotation section remains ON.

<2> Non-connected mode:

When the short connector S-CNN is connected to CNN116.
The power of the internal units of the gantry rotation section remains ON.

*: The setting at the time of shipment is non-connected mode.

*: To enable DAS timer setting, refer to subsection 3.2.9 "Setting the DAS
Timer".

No. 2D201-102EN*B
181
(4) When the emergency switch is pressed

• The power of the entire gantry is turned OFF (MC111, MC112, and MC113 are
turned OFF).

• This status is retained until the power switch of the console is turned OFF.

(The emergency status is released by turning OFF power switch of the console.)

CAUTION: Take precautions against electric shock because power is

supplied up to the input terminal of MC113 in the servo unit
even when the circuit protector CP1 of the gantry stationary
section is turned OFF.

No. 2D201-102EN*B
182
 Rotation section of the gantry
CNN117: Always open
TB2 HFG
NFB2
3φ
200 VAC
BRUSH CP740 DAS, DETECTOR
SHORT-CONNECTOR(CNN116)
ON/OFF
OPCONT, MUDAT (R)
MC113
LCSR
OFFDELAY-TIMER(112)
ON/OFF

DAS-TIMER(111) START
ON/OFF
RY111

EMERGENCY CONSOLE-POWER SW
No. 2D201-102EN*B

OFF SI
MC111
SENSOR
P-ON
PS111 ON/OFF
DC24V
183

Patient couch

TB1
CP1
3φ
200 VAC KGTS, MUDAT (S)
OPERATING-PANEL, FAN
KGTS, μ SW
TILT MOTOR
MC111 ON condition MC112
TILT.POWER M CP5
Console power SW is ON. UP MOTOR
UP.POWER
M
DOWN.POWER
MC112 ON condition
MC111 is ON and DOWN VALVE
TILT μ SW is ON and
MC : MAGNET CONTACTOR CP51
KGTS safety circuit is OK. SLIDE MOTOR
CP : CIRCUIT PROTECTOR S SERVO M
NFB : NO FUSE BREAKER MC320
MC113 ON condition ERROR
Console power is ON or CP320 COVER SW
ROTATION MOTOR
OFF delay-timer is ON or
S SERVO M
SHORT-CONNECTOR is ON
(connected to CNN116) or
SW326 BRAKE
DAS-TIMER is ON. R BRAKE
RELEASE

Figure 3.2-7 Gantry power supply sequence diagram

 When the short connector is connected to CNN116. When the short connector is connected to CNN117.
(Non-connected mode: At the time of shipment) (Connected mode)
Power switch OFF Power switch ON Power switch OFF Power switch ON
Console

MC111, MC112 OFF MC111, MC112 OFF

Gantry stationary
section

Inside the gantry MC113 ON MC113 OFF MC113 ON

rotation section
No. 2D201-102EN*B

1 hour
184

MC113 (inside the gantry rotation section) is turned OFF after

1 hour by the off-delay timer.
Note that when the DAS timer is ON, MC113 remains ON.

When the power switch of the console is turned OFF

Short connector Off-delay timer DAS timer status Stationary Rotation section
status section power internal power
OFF OFF OFF ON
Connected to ON OFF OFF ON
CNN116 OFF ON OFF ON
ON ON OFF ON
OFF OFF OFF OFF
Connected to ON OFF OFF ON
CNN117 OFF ON OFF ON
ON ON OFF ON

Figure 3.2-8 Gantry power supply timing chart

3.2.9 Setting the DAS timer
Set the DAS timer (TIMER 117) located in the servo unit as required.
To stabilize the temperature of the inside of the data acquisition section, especially that
of the detector, it is necessary to supply power to the heater for more than 2.5 hours.
By setting the DAS timer, power is automatically supplied to the data acquisition section
before the system is turned ON, which makes it possible to use the system immediately
after turning ON the power switch of the console.
To make the DAS timer setting effective, the system must have been set to system
power supply mode (connect the short connector S-CNN to CNN117 in the servo unit).
Refer to subsection 3.2.8.

No. 2D201-102EN*B
185
(1) Names and functions of each part of the DAS timer

Operation selecting knob

with ON/OFF display Setting indicator

Frequency selection switch

Dial

Knob
Mounting
hole

Manual Storage hole for the

switch extra setting indicator

Name Function
Operation selecting knob This displays the ON/OFF status of the control
with ON/OFF display output and ON/OFF selection of the control output
can be performed by turning the knob clockwise.
Setting indicator There are two setting indicators; ON (gold) and OFF
(silver). The power of the data acquisition section is
turned ON or OFF at the desired time.
Dial This holds the setting indicator and performs time
display in 15-minute increments.
Knob This is for turning the dial manually and displays the
current time in one-minute increments.
Mounting hole This is used to fix the timer using an M3 screw.
Storage hole for the extra This stores the extra setting indicator.
setting indicator
Manual switch Auto : Power is supplied to the data acquisition
section according to the time set on the dial
by the setting indicator.
ON : Power is supplied to the data acquisition
section regardless of the setting indicator set
on the dial.
OFF : Power to the data acquisition section is
coupled to ON/OFF operation of the console
power switch.
Frequency selection This is used to select 50 Hz or 60 Hz.
switch

No. 2D201-102EN*B
186
(2) Setting procedure

(a) When power to the gantry is supplied all day and night

The manual switch is turned "ON". The manual switch is set to OFF at the
time of shipment from the factory.

(b) When supplying power to the data acquisition section is controlled using the
setting indicator

a. Use the DAS timer line frequency change window on the rear of the servo
unit to set the frequency change switch (white) on the rear of the DAS timer
to the line frequency of the site (set the arrow indicator to 50 Hz or 60 Hz).
50 Hz is set at the time of shipment from the factory.

b. Set the manual switch to "AUTO".

c. Securely insert the setting ON indicator (gold) into the dial groove of the
desired continuity start time and the setting OFF indicator (silver) into that
of the desired continuity stop time. Note that the setting indicator should
not be inserted in the dial groove within the ±15-minute position from the
current time position. For this case, turn the center knob in the arrow
direction to shift the desired groove position a little from the current time
position and then insert the setting indicator. Be sure to set the setting ON
and OFF indicators as a pair.

d. After completing the setting indicators, turn ON the power of the system,
rotate the center knob in the arrow direction to perform dial one rotation,
and confirm that the display of ON/OFF operation alternates according to
the program set by the setting indicators.

e. Last, turn the center knob in the arrow direction to set the current time
(hour, minute) correctly. By performing the above work, operation starts.

(c) When the timer is not used

The manual switch is set to "OFF". Note that a ring artifact or a navel artifact
may be generated if the gantry is used with unstable temperature inside the
detector.

No. 2D201-102EN*B
187
 (3) Note

(a) When the DAS timer is set, power is supplied to the gantry rotation section
even if the power switch of the console is turned OFF.

(b) When the DAS timer is used, always turn ON the switch on the switchboard to
which the system (or the gantry when the power-supply system of the gantry
is different from that of the console) is connected.

(c) If a power failure occurs, reset the current time because the time of the DAS
timer is delayed by the time elapsed during the power failure.

(d) When the setting of the manual switch is changed from "ON" or "OFF" to
"AUTO", check the current status using the operation selecting knob with
ON/OFF display. If the displayed status differs from the set status, turn the
operation selecting knob with ON/OFF display clockwise to set to the desired
status.

Servo unit rear view

Lamp

TB111
R320 R321 R322

DAS timer (TIMER 111)

Line frequency change window (50 Hz/60 Hz selection)

No. 2D201-102EN*B
188
3.3 Outline of the PWBs
3.3.1 Settings of KGTSM switches

3.3.1.1 For 1.0-s rotation systems

LED67 LED66
SW1

White Blue Blue

SW21 SW12 SW11

SW31 SW32

DSW5 DSW11

DSW10 DSW1

DSW12 DSW4

Switches Settings during normal use Description

DSW1 1, 3, 6, and 7 are set to ON. Settings of the CN404, CN402 (for service
use and for the SS simulator) port
DSW4 1 is set to ON. System setting
DSW5 2 is set to ON. For switching the communication destination
SS (2 is ON) and T3100 (1 is ON)
DSW10 4 is set to ON. For maintenance of the gantry rotation
section
DSW11 8 is set to ON. System setting
DSW12 All OFF Not used
SW1 To be set upward For using the maintenance panel
SW21 KGTSM reset during OFF KGTSM reset
setting

SW11, SW12, SW31, and SW32 are provided for maintenance panel operation.

No. 2D201-102EN*B
189
3.3.1.2 For 0.75-s rotation systems

LED67 LED66
SW1

White Blue Blue

SW21 SW12 SW11

SW31 SW32

DSW5 DSW11

DSW10 DSW1

DSW12 DSW4

Switches Settings during normal use Description

DSW1 1, 3, 6, and 7 are set to ON. Settings of the CN404, CN402 (for service
use and for the SS simulator) port
DSW4 1 is set to ON. System setting
DSW5 2 is set to ON. For switching the communication destination
SS (2 is ON) and T3100 (1 is ON)
DSW10 4 is set to ON. For maintenance of the gantry rotation
section
DSW11 7 and 8 are set to ON. System setting
DSW12 All OFF Not used
SW1 To be set upward For using the maintenance panel
SW21 KGTSM reset during OFF KGTSM reset
setting

SW11, SW12, SW31, and SW32 are provided for maintenance panel operation.

No. 2D201-102EN*B
190
3.3.2 KGTSM, connectors, and LEDs
LED 73 SSERVO ON
LED 38 POWER ON
LED 37 CONDI. OK
LED 35 SPEED ON

LED 81 RPANERR
LED 21 INT1
LED 22 INT2
LED 23 INT3
CN491

404

402

433
CN

CN

CN
456

459
CN

CN
LED 71 ALARM
LED 70 FINISH
LED 7 DPINTL
LED 5 LOCAL
LED 2 HALT

CN401
(GCIF2)
LED 89 R-ENCODER
LED 57 IN LOCK
LED 55 T+LOCK
LED 56 T-LOCK

LED 92 FAULT
LED 91 DDPLS

LED 26 INT6

CN454
LED 33 BRK OFF
LED 36 SERVO ON
LED 9 TILT-ON
LED 10 TILT+ON
CN431

LED 11 TILT ON
LED 12 T-BRK OFF LED 64 VTRIG
LED 13 TILTSTOP LED 65 XRAY-ON
LED 14 TENPLS LED 62 PSEL B
LED 15 HI-MASTER LED 63 BGN
LED 16 DOWN1 LED 61 PSEL A
LED 17 DOWN2 LED 49 LOCAL 2
(KGTSP)
LED 82 LPANERR

CN451
LED 60 DN LOCK
LED 59 UP LOCK
LED 58 OT LOCK

LED 18 UP LED 54 HARD ERR

LED 20 AC200V ON LED 27 100kHz
LED 24 INT4 LED 83 OPTSH
LED 1 (RESET)

LED 25 INT5 LED 75 SLIDE CHK

LED 8 STATUS LED 48 SLIDE IN
LED 3 DTR LED 42 GVSEL B
LED 41 GVSEL A
LED 40 POSI-PLS
LED 69 SLIDE OUT
LED 93 RENABLE

CN432
ROTA POSITION
(TAPE SW
SENSOR)
CN409

CN408
406

407
CN

CN
No. 2D201-102EN*B
191
 Table 3.3-1 List of KGTSM LEDs (1/5)

LED Name Meaning/operation In idle status Remarks

1 RESET GTS PWB reset signal: o OFF The LED should not
When resetting is performed, the LED lights. remain lit.
2 HALT Communication CPU (Z80) halting: o OFF The LED should not
When the CPU is halted, the LED lights. remain lit.
3 DTR GTS communication enabling (DATA TERMINAL READY): * ON
Communication is enabled when the LED is lit.
5 LOCAL Local mode signal from the operating panel (after gating): o OFF
When the system enters local mode, the LED lights.
7 DPINTL Access of 68K to DPRAM (unused address): * ON
When DPRAM is accessed, the LED lights.
No. 2D201-102EN*B

8 STATUS Status display signal from GTS to SS: * Blinking

When the LED is blinking, status signals are being transmitted.
9 TILT-ON Output of - tilting operation signal: o OFF
192

When the LED is lit, the operation signal is being output.

10 TILT+ON Output of + tilting operation signal: o OFF
When the LED is lit, the operation signal is being output.
11 TILT ON Output of tilting operation signal (output of master phase): o OFF
When the LED is lit, the operation signal is being output.
12 T-BRK OFF Tilt motor brake releasing: o OFF
When the brake is released, the LED is lit.
13 TILT STOP Tilt stop signal (0° step tilt): o OFF
Stop signal output when the LED is lit
14 TEN PLS Tilt encoder pulse signal: Depends upon
When the LED is blinking, pulses are being output. the status
15 HI-MASTER Output of upward and downward movement signals (output of master SSR): o OFF
When the LED is lit, the operation signal is being output.
16 DOWN 1 Output of downward movement signal (valve 1): o OFF
When the LED is lit, the operation signal is being output.
 Table 3.3-1 List of KGTSM LEDs (2/5)

LED Name Meaning/operation In idle status Remarks

17 DOWN 2 Output of downward movement signal (valve 2): o OFF
When the LED is lit, the operation signal is being output.
18 UP Output of upward movement signal: o OFF
When the LED is lit, the operation signal is being output.
20 200 VAC ON 200 V power line (HARD-ERR, power supply to the motor is interrupted using SW4): * ON When an error occurs,
When 200 V power line is connected, the LED lights. the LED goes out.
21 INT 1 Interruption of level 1 (GNS, used for maintenance): o OFF The LED should not
An interruption is ouput when the LED lights. remain lit.
22 INT 2 Interruption of level 2 (sensor, interlock): o OFF The LED should not
An interruption is output when the LED lights. remain lit.
No. 2D201-102EN*B

23 INT 3 Interruption of level 3 (local control system timer GA): o OFF The LED should not
An interruption signal is output when the LED lights. remain lit.
24 INT 4 Interruption of level 4 (DP RAM: Z80): o OFF The LED should not
193

When an interruption is output, the LED lights. remain lit.

25 INT 5 Interruption of level 5 (DAS, rotation): o OFF The LED should not
When an interruption is output, the LED lights. remain lit.
26 INT 6 Interruption of level 6 (system clock): o OFF The LED should not
When an interruption is output, the LED lights. remain lit.
27 100 kHz 100 kHz clock signal: * Blinking
When the LED is blinking, the clock signal is being output.
33 BRK OFF Servo motor brake OFF signal: o OFF Not used
Brake is OFF when the LED is lit.
35 SPEED ON Output of voltage (for speed) to servo amplifier: o OFF Not used
When the LED is lit, voltage is being applied.
36 SERVO ON Output of servo system ON signal (ON: rotation, OFF: stop): o OFF Not used
When ON (rotation) signals are output, the LED lights.
37 CONDI. OK Servo unit condition status: * ON Not used (always lit)
When the conditions are acceptable, the LED lights.
 Table 3.3-1 List of KGTSM LEDs (3/5)

LED Name Meaning/operation In idle status Remarks

38 POWER ON Power input status of the servo unit: * ON Not used (always lit)
When the LED is lit, power is ON.
40 POSI-PLS Input of rotation position sensor: o OFF
When the LED is lit, the sensor is being interrupted.
41 GVSEL A Gantry VTRIG generation mode selection * ON
LED41: OFF, LED42: OFF = Pulses for 0.75-second rotation have been
selected. (12 E-PULSE 1 GVTRG)
42 GVSEL B LED41: ON, LED42: OFF = Pulses for 1.0-, 1.5-second rotation have been o OFF
selected. (9 E-PULSE 1 GVTRG)
48 SLIDE IN Output of couch top inward movement pulses: * ON
When the LED is blinking, pulses are being output.
No. 2D201-102EN*B

49 LOCAL 2 Local control signal from the operating panel (2nd line): o OFF
When local mode signals are input, the LED lights.
54 HARD ERR Error detection status of the safety circuit (100 V, 200 V line OFF): o OFF When an error occurs,
194

When an error occurs, the LED lights. the LED lights.

55 T+ LOCK + tilting interlock status: Depends on
When + tilting operation is disabled, the LED lights. the status
56 T- LOCK - tilting interlock status: Depends on
When - tilting operation is disabled, the LED lights. the status
57 IN LOCK Couch top inward movement interlock status: Depends on
When inward movement is disabled, the LED lights. the status
58 OT LOCK Couch top outward movement interlock status: Depends on
When outward movement is disabled, the LED lights. the status
59 UP LOCK Couch top upward movement interlock status: Depends on
When upward movement is disabled, the LED lights. the status
60 DN LOCK Couch top downward movement interlock status: Depends on
When downward movement is disabled, the LED lights. the status
 Table 3.3-1 List of KGTSM LEDs (4/5)

LED Name Meaning/operation In idle status Remarks

61 PSEL A VTRIG selection o OFF
LED61: OFF, LED62: OFF = Internal clock pulses are used as VTRIG.
62 PSEL B LED61: ON, LED62: OFF = Gantry pulses are used as VTRIG. o OFF
LED61: OFF, LED62: ON = Couch pulses are used as VTRIG.
63 BGN Output of BGN (acquisition start) signal: o OFF
When the BGN signal is output, the LED lights.
64 VTRIG Output of VTRIG (VIEW-TRIG): * Blinking
When the LED is blinking, pulses are being output.
65 XRAY ON Output of X-RAY ON signal to XC: * ON
When the LED is lit, the system is in X-RAY OFF status.
69 SLIDE OUT Output of couch top outward movement pulses: * ON
No. 2D201-102EN*B

When the LED is blinking, pulses are being output.

70 FINISH Slide operation: * ON
The LED lights when the operation is completed.
195

71 ALARM Output of a slide servo error: * ON

The LED is lit when the slide servo motor is normal.
73 SSERVO ON Output indicating that the slide servo motor is turned on * ON
(Operable when the slide servo motor is ON):
When the LED is lit, the slide servo motor is ON.
75 SLIDE CHK Slide runout detection: o OFF When an error occurs,
Runout is detected when the LED lights. the LED lights.
81 RPANERR Not used —
82 LPANERR Not used —
83 OPTSH Tilt, slide, and vertical movement signals from the operating panel o OFF
(for dual protection):
When the LED is lit, the signals given on the left are entered.
89 R-ENCODER Pulse input of the rotation encoder: Uncertain
When the LED is blinking, pulses are input.
 Table 3.3-1 List of KGTSM LEDs (5/5)

LED Name Meaning/operation In idle status Remarks

91 DD PLS DD motor rotation pulse input (Not used for the Asteion): Undefined
Pulse is input when the LED blinks.
92 FAULT DD motor FAULT input (Not used for the Asteion): * ON
FAULT is recognized when the LED lights.
93 RENABLE DD motor rotation enabling (Not used for the Asteion): o OFF
Rotation is enabled when the LED lights.
No. 2D201-102EN*B
196
3.3.3 VRs and Test Pins (TP) of the KGTSM PWB

TP8
TP2
TP40
TP9
VR7 VR6
VR4
VR5 VR1
TP1
TP41

TP3

TP7

TP60
TP50
TP51
TP4 TP52 TP5
TP46 TP43

VR No. Name Meaning (contents)

VR1 ROTA SPEED For rotation speed adjustment
VR4 PROJ/OFFSET For offset adjustment of the projector angle display
VR5 PROJ/GAIN For gain adjustment of the projector angle display
VR6 HEIG/OFFSET For offset adjustment of the couch height display
VR7 HEIG/GAIN For gain adjustment of the couch height display

Note) VR4 and VR5 are not used (no external projectors).

No. 2D201-102EN*B
197
 TP No. Name Meaning (contents)
TP1 0V Power supply 0 V (DC power supply)
TP2 0V Power supply 0 V (DC power supply)
TP3 0V Power supply 0 V (DC power supply)
TP4 0V Power supply 0 V (DC power supply)
TP5 0V Power supply 0 V (DC power supply)
TP7 +5 V Power supply +5 V (DC power supply)
TP8 +15 V +15 V (DC/DC power supply output)
TP9 -15 V -15 V (DC/DC power supply output)
TP40 SPEED DATA Rotation speed voltage 0 V
TP41 SPEED DATA V Rotation speed voltage
TP43 R-ENCODER Rotation encoder pulse
TP46 POSI-PLS Rotation reference sensor signal
TP50 VTRIG Output of VTRIG (VIEW-TRIG)
TP51 XRAY ON Output of X-RAY ON signal to XC
TP52 BGN Output of BGN (acquisition start) signal
TP60 DDPLS DD motor (rotation) pulse (not used)

3.3.4 OPCONT2 switch setting

Î Refer to service manual
2D201-103EN.

3.3.5 Connectors, LEDs, check terminals (TP), and DIP switches of the
OPCONT2

Î Refer to service manual

2D201-103EN.

3.3.6 GCIF2 switch setting

Î Refer to service manual
2D201-103EN.

3.3.7 Connectors, LEDs, check terminals (TP), and DIP switches of the
GCIF2
Î Refer to service manual
2D201-103EN.

No. 2D201-102EN*B
198
3.3.8 Setting short pins and adjusting variable resistors on the KGTSP
(1) Setting JP1

By setting JP1 short pins, the lighting status of the wall-mounted lamp and the X-ON
lamp can be changed. The lighting status of the wall-mounted lamp and the X-ON
lamp are given below. Note that these status are only for the case where the wall-
mounted lamp is connected to the gantry.

JP1 setting Status Wall-mounted lamp X-ON lamp

Short between Ready Lit

pins 1 and 2 X-ON (exposure) Lit

Short between Ready

pins 3 and 4 X-ON (exposure) Lit Lit
Short between Ready Stays lit while
pins 5 and 6 power is ON *1)
X-ON (exposure) Stays lit while Lit
power is ON *1)

Short between Ready

pins 7 and 8 X-ON (exposure) Lit

*1) This lamp stays lit while power is supplied to the gantry stationary section.
*2) Pins 5 and 6 are shorted when the equipment is shipped from the factory.

(2) Adjusting variable resistors

VR Function
VR1 Adjusts amplification of the front microphone signal.
VR2 Adjusts amplification of the central microphone signal.

• VR1 and VR2 are set to an intermediate value at the time of shipment.
Normally, they do not need to be adjusted.

No. 2D201-102EN*B
199
 CN511
CN514 (2)
CN503 (2)
(4) CN502
(9) CN515
CN501 (12)
(40)

CN517

2
1
CN512
(14) (4)
JP1

CN504(4)
8
7
CN516
(12)

CN509 VR1 VR2 CN510(3)

(9)

VR3 CN507(9)

CN508
(4)
CN505(6)
CN506
(9)

Figure 3.3-1 KGTSP PWB

No. 2D201-102EN*B
200
3.4 Use of the KGTSM Maintenance Panel
3.4.1 Important notices
(1) When the panel switch SW1 is set to ON, the KGTSM maintenance panel cannot
be operated from the operator panels or from the console.

(2) When the panel switch SW1 is turned ON while the gantry or couch is in motion,
the gantry or couch stops. The gantry stops rotating at the TUBE home position
(tube position -15°).

(3) After using the maintenance panel, be sure to reset the KGTSM.

3.4.2 Procedures to use the maintenance panel

<Work procedure>

(1) Set the lever of the panel switch SW1 on the KGTSM to the PANEL ON position
(downward).

Ö The maintenance panel can be used.

(2) Set switch SW32 to select an object (function) to move.

Ö Indicator LED66 shows the value Î Refer to table 3.4-2 "List of

set by this switch SW32. maintenance panel functions".

(3) Set switch SW31 to select a mode. (See "List of maintenance panel functions".)

Ö Indicator LED67 shows the value Î Refer to table 3.4-2 "List of

set by this switch SW31. maintenance panel functions".

(4) Operate switches SW11 (SET) and SW12 (SCAN).

Ö Check how the selected function is Î Refer to table 3.4-3

carried out by these switches. "Maintenance panel operations".

Ö The test rotation, scanoscope, and

scanner start by these switches.

(5) Carry out the selected function in the selected mode.

(6) Set the lever of the panel switch SW1 on the KGTSM to the PANEL OFF position
(upward).

Ö "F" is displayed on the 7-segment LEDs (LEDs 66 and 67).

(7) Press the RESET switch (SW21) or turn OFF the power.

Ö The display of the 7-segment LEDs (LED66 and LED67) turns from FF to 88.

No. 2D201-102EN*B
201
 Table 3.4-1 Switches used for maintenance panel operations

(1) SW1 (PANEL ON)

67 66
When this switch is set ON, the
maintenance panel can be used.
LED67 LED66
(2) SW32 (FUNCTION SET)
SW1
Used to select an object PANEL ON
(e.g., wedge) to move.

(3) SW31 (MODE SET)

Used to start the selected

operation. SW21 SW12 SW11
RESET SCAN SET
(4) SW11 (SET)

Starts operation.

(5) SW12 (SCAN)

Press this switch together with

SW31 SW32
SW11 to rotate the gantry.

No. 2D201-102EN*B
202
 Table 3.4-2 List of maintenance panel functions

Operation mode (Setting on SW31)

1 2 3 4 5 6 7 8
Function 1 Wedge Normal Small Step Flat DR
2 DAS TEST AUTO TEST GAIN00 GAIN01 GAIN10
3 SLIT 10 5 3 2 7 1 0.8
4 Beam Open 3 2 1 5 7 0.8
trimmer
5 TILT + -
(Setting 6 T-ROTA 60 s
on SW32) ROTA-
TION
7 SCANO 0° 90° 180° 270°
8 SCAN 1.5 s 1.0 s 0.75 s
9 LIGHT ON OFF
A
B SLIDE SLOW-IN SLOW- FAST-IN FAST-
OUT OUT
C HEIGHT UP DOWN
D COM-PRE PATTERN PATTERN OFFSET
CONTROL 1 2
E SLIDE IDLE REMOTE CLEAR
DISPLAY
F ROTOR RELEASE LOCK
BRAKE

CAUTION: 1. If the 2.0-MHU X-ray tube is installed in the system, do not perform
0.75-second rotation from the gantry maintenance panel.
Doing so may damage the X-ray tube.

2. When SW32 on the maintenance panel is set to 8, do not perform

scanning more than 10 times in succession.
After shutdown, wait for at least 30 seconds before restarting the
system. Otherwise, the servo-amplifier may be damaged.

No. 2D201-102EN*B
203
 Table 3.4-3 Maintenance panel operations

Operation when the

Setting Start Operation (when the related
Function PANEL switch is
on SW32 switch switch is turned ON or OFF)
turned OFF
1 Wedge SET The slit moves until it reaches Keeps on moving till
the end once the SET switch is it reaches the end.
pressed.
2 DAS test SET Starts when the SET switch is Stops in the current
pressed. status.
3 Slit SET The slit moves until it reaches Keeps on moving till
the end once the SET switch is it reaches the end.
pressed.
4 Beam SET The slit moves until it reaches Keeps on moving till
trimmer the end once the SET switch is it reaches the end.
pressed.
5 Tilt SET Tilting is carried out while the Immediately stops.
SET switch is pressed.
(Tilting stops when the SET
switch is released.)
6 Test SET & Tilting is carried out while these Rotates at 1 rpm.
rotation SCAN switches are pressed.
(Tilting stops when the switches
are released.)
7 Scano SET & The scano moves until it Keeps on moving till
SCAN reaches the end once these it reaches the end.
switches are pressed.
8 Scan SET & Scanning is carried out while Keeps on rotating at
SCAN these switches are pressed. a preset speed.
When the switches are
released, the gantry rotation
slows down and the gantry
stops at the TUBE TOP
position.
9 Light SET Lights when the SET switch is Remains in the
pressed. current lamp status.

No. 2D201-102EN*B
204
 Operation when the
Setting Start Operation (when the related
Function PANEL switch is
on SW32 switch switch is turned ON or OFF)
turned OFF
A
B Horizontal SET Moves while the SET switch is Gradually reduces
movement pressed. Stops immediately speed and stops.
when the SET switch is
released.
C Vertical SET Moves while the SET switch is Immediately stops.
movement pressed. Stops immediately
when the SET switch is
released.
D COM-PRE SET This is set when the SET switch
Control is pressed.
E Slide idle SET Starts or is zero-cleared when Remains in the
the SET switch is pressed. current status.
F Rotor brake SET & Starts when the SET switch is Remains in the
SCAN pressed. current status.

*1 Do not change the setting of switch SW32 while a selected function is carried out.
*2 Do not turn OFF the PANEL switch before the SET switch (and the SCAN switch) is
released.
*3 Be sure to reset the KGTSM after using the maintenance panel.

No. 2D201-102EN*B
205
3.5 Obtaining KGTSM Status Information
3.5.1 KGTSM messages
The KGTSM PWB sends a status message to a personal computer when an error
occurs, when scanning is executed, or when the gantry rotation speed is checked.
The following is a list of such messages and their meaning.

<Tools required>

1) Personal computer

2) Service cable (GR-1, as standard)

3) Two programs: TERM.COM and MTERM.BAT

<Procedure to collect the messages>

1) Connect the COM port of the personal computer to connector CN404 of the KGTSM
PWB, using the service cable.

2) Start the TERM program on the personal computer.

Transfer to the directory where TERM.COM and MTERM.BAT are located and enter
"MTERM[CR]".

3.5.1.1 Message output timing

Error messages are displayed only when the corresponding errors are recognized.
After an error occurs, the error status (see subsection 3.5.2) can be confirmed in detail
by connecting the personal computer.
(Exception: Messages for the servo-amp error and 100 V/200 V power off error remain
displayed.)

3.5.1.2 Typical error messages

The following are typical error messages (* indicates that the message is not an error
message).

DISP: 100 V/200 V power off The 100 V/200 V power is OFF.

DISP: SS/ADI hang-up signal on An SS/ADI2 watchdog error has been

detected.

DISP: MUDAT ROTSOT fail An error has been detected between the
rotation section and the stationary
section.

DISP: MUDAT SOTROT fail An error has been detected between the
stationary section and the rotation
section.

DISP: MUDAT DCLKERR Abnormal number of data sets in 1 view

MAIN: Dip-SW setup error (DSW11) Error in DIP-SW11 setting.

MAIN: hard timer check error A hardware timer error is detected in the
startup check.

No. 2D201-102EN*B
206
 MAIN: D.P.R. check error The KGTSM hardware is abnormal.

ROTE: gate array error (init): Oxff The hardware for gantry rotation control
is abnormal.

ROTE: servo error (init): Oxff The rotation servo-motor is abnormal.

ROTE: servo error: Oxff The rotation servo-motor is abnormal.

ROTE: speed error The rotating speed of the gantry has

exceeded the controllable range.

* ROTE: current: Oxffff std: Oxhhhh Oxffff indicates the speed data at the
time of the first speed check (std stands
for standard value).

ROTE: current: Oxffff std: Oxffff indicates the speed data at the
Oxhhhh (adjust) time of the second speed check (std
stands for target value.)

ROTE: placement error Designation error of the gantry stop

position

ROTE: limit1 error No reduction point interrupts before the

gantry stops.

ROTE: limit2 error No stop point interrupts before the gantry

stops.

ROTE: position sensor error The position sensor cannot be

recognized.

DAS: Mat Switch state is abnormal XX The mat switch or tape switch was
touched when Helical/Scano was to be
started.

DAS: X-ray ON yet DAS port status X-ray generation does not stop.
XXXX

DAS: COM-PRE hard error COM-PRE error was detected.

at offset 0xXXXXXXXX
scan
scano

DAS: offset L1 time-out COUNTER Offset acquisition does not start.

XXXX COM-PRE XXXX

DAS: offset CP1 order error Offset acquisition interrupt abnormal

DAS: offset CP2 order error Offset acquisition interrupt abnormal

DAS: offset time-out COUNTER Offset acquisition time-out

XXXX COM-PRE XXXX

DAS: offset COM-PRE error COM-PRE error occurred at offset

0xXXXXXXXX VIEW XXXX acquisition.
COM-PRE XXXX

No. 2D201-102EN*B
207
DAS: offset move error XXXXXXXX COM-PRE error occurred at offset
transfer.

DAS: offset move time-out Offset transfer time-out

XXXXXXXX

DAS: scan L1 order error Data acquisition interrupt abnormal

DAS: scan L2 order error Data acquisition interrupt abnormal

DAS: scan L1 time-out COUNTER Data acquisition does not start.

XXXX COM-PRE XXXX

DAS: scan L2 time-out COUNTER Data acquisition time-out

XXXX COM-PRE XXXX

DAS: Gate Array init status Fail XX Data acquisition hardware abnormal

DAS: scano L1 order error Scano acquisition interrupt abnormal

DAS: scano L2 order error Scano acquisition interrupt abnormal

DAS: scano L2 time-out COUNTER X-ray exposure does not start.

XXXX COM-PRE XXXX

DAS: scano L1 time-out COUNTER Scano acquisition does not start.

XXXX COM-PRE XXXX

DAS: scano second L2 time-out Scano acquisition time-out

COUNTER XXXX COM-PRE
XXXX

DAS: helical slide L1 time-out Helical starting position cannot be

recognized.

DAS: helical L1 order error Helical acquisition interrupt

abnormal

DAS: helical L2 order error Helical acquisition interrupt

abnormal

DAS: helical L1 time-out COUNTER Helical acquisition does not start.

XXXX COM-PRE XXXX

DAS: helical L2 time-out COUNTER Helical acquisition time-out

XXXX COM-PRE XXXX

DAS: helical speed check error (XXXX) Couch speed error during helical scan

DAS: scan COM-PRE error 0xXXXXXXXX VIEW XXXX COM-PRE XXXX

scano
helical COM-PRE error occurred in data
acquisition.
Error code 0x00000002 is generated
when metal is scanned or when no
X-ray is generated at an offset-
adjusted low count.

No. 2D201-102EN*B
208
*DAS: offset done L1 ΔΔ L2 XX VIEW POS ∇∇ COM-PRE ◊◊
scan
scano Acquisition starts from the ΔΔth helical
pulse.
Acquisition completes at the XXth pulse.
is the number of acquired views that
KGTSM has recognized.
∇∇ is the couch pulse according to
data acquisition.
◊◊ is the number of acquired views that
COM-PRE has transferred.

SLIDE: 100 ms interval error Watchdog error of the operation panel

SLIDE: time-out Time-out during couch movement

SLIDE: CP2 interrupt Couch overrun of 10 mm or more.

SLIDE: hardware failure The couch moved to the opposite

(direction error) direction. (10 mm or more)

SLIDE: Can't move. Movement disabled due to error.

(Error is 000000XX.)
D5 D4 D3 D2 D1 D0

D5: Slide overrun, servo

abnormal, or movement in
reverse direction
D4: Not used
D3: Watchdog error
D2: Slide time-out
D1: Not in use
D0: Not in use

SLIDE: Servo Error (0xXX) Couch slide servo abnormal

TILT: 100 ms interval error Watchdog error of operating panel

TILT: time-out Time-out during gantry tilting

TILT: Encoder time-out Gantry tilt encoder does not

function.

TILT: Limit interrupt Detection of gantry tilt limits

TILT: hardware failure Gantry tilting in reverse direction.

(direction error) (2° or more)

No. 2D201-102EN*B
209
TILT: Can't move. Movement disabled due to error.
(Error is 000000XX.)
D5 D4 D3 D2 D1 D0

D5: Movement in reverse direction

D4: Not in use
D3: Watchdog error
D2: Tilt movement time-out
Encoder time-out
D1: Not in use
D0: Not in use

HITE: 100 ms interval error Watchdog error of operating panel

HITE: time-out Time-out during vertical movement

of couch

HITE: hardware failure Couch vertical movement in

(direction error) reverse direction. (10 mm or more)

HITE: Can't move. Movement disabled due to error.

(Error is 000000XX.)
D5 D4 D3 D2 D1 D0

D5: Movement in reverse direction

D4: Not in use
D3: Watchdog error
D2: Vertical movement time-out
D1: Not in use
D0: Not in use

GND: Internal light error No response to request for internal

light projection

GNS: Polling error No response to status request to

OPCONT

GNS: communication error Error in communication with

OPCONT.

GNS: No response from GNS board No response from OPCONT2

GNS: Ack/Nak text receive time-out No response from OPCONT2

GNS: retry over times The specified number of retry times

was exceeded during attempts to
communicate with OPCONT2.

GNS-CHILD: Nak received XX XX The request data sent to OPCONT2

is abnormal.

GNS-CHILD: command time-out mail No request for termination from

: XXXXXXXX OPCONT2

GNS-CHILD: slit error [0xXX:C] Slit action abnormal.

GNS-CHILD: action expect error OPCONT2 action different from that

specified

No. 2D201-102EN*B
210
 GNS-CHILD: wedge error [0xXX:C] Wedge action abnormal.

GNS-CHILD: beam timmer error Beam trimmer action abnormal.

[0xXX:C]

3.5.1.3 Terminal log

Up to 512 of the most recent messages (messages shown in the preceding subsection)
are stored in the memory within the KGTSM. The messages can be checked later
using the method outlined below:

<Work procedure>

(1) Connect CN404 of the KGTSM to the COM port of the personal computer using the
service cable.

(2) Start the TERM program on the personal computer.

Transfer to the directory containing TERM.COM and MTERM.BAT and enter
MTERM.

(3) Input log [Enter] from the personal computer.

[GTS] log [Enter]

*** message log list ***

HH:MM:SS DISP: XXXXXXXXXXXXXXXX
HH:MM:SS SLIDE: YYYYYYYYYYYYYYYY
:
:

20 messages are displayed in order starting from the oldest message.

*: HH:MM:SS indicates the time of registration.

(4) After a message is displayed, the following commands can be used:

command f:fwd b:bwd q:quit :

f: Next screen
b: Preceding screen
q: End terminal log

CAUTION: When checking the terminal log, do not turn the gantry power ON/OFF or
reset the KGTSM PWB. These actions will result in the memory being
cleared.

No. 2D201-102EN*B
211
3.5.2 Detailed KGTSM Status codes (including error codes and interlock
information)
This subsection describes how detailed status information for the KGTSM can be
obtained. The following information can be seen:

(1) Cyclic status data

(b1)(b2) : Running status of the KGTSM

(c) : DAS offset status

(d) : Operating status of the gantry

(e) : X-ray ON status

(X-ray ON signal sent from the KGTSM to the XC)

(f) : Couch status

(g) : OPCONT2 status

(h1) to (h8) : Outline of errors

(indicating the function which caused the error)

(i) to (k) : Status of interlocks

(l1)(l2) : Rotation information of the gantry

(m1) to (m4) : Position information of the X-ray tube on the gantry

(n1) to (n6) : Position information of the couch top (horizontal)

(o1) to (o4) : Position information of the couch (vertical)

(p1) to (p4) : Tilt angle information of the gantry

(q) : Cylinder pressure (unused)

(r) : Idle status and projector ON/OFF status

(s) : Status of the OUT-2 sensor

(t) : Request status condition

(u) : Detailed status of COM-PRE

No. 2D201-102EN*B
212
(2) List of return status (more detailed information)

(a) to (f) : Functional status of the inside of the rotation section of the gantry

(g) to (j) : Functional status of the stationary section of the gantry

(k1) to (k6) : Sensor information

(l1) to (l4) : Angular position information of the external light projector

(m1) to (m17) : Details of errors

(n) to (v) : Scan conditions set by the system

(not explained in this section)

(w) : Gantry rotation speed data

(x) : Angular information from gantry tilt encoder

(y) : Couch horizontal movement speed data

(z) : Couch speed information for CT fluoroscopy

<Tools required>

1) Personal computer

2) Service cables (GR-1, as standard)

3) Two sets of programs: TERM.COM and MTERM.BAT

<Procedure to collect status data>

1) Connect CN404 of the KGTSM to the COM port of the personal computer using the
service cable.

2) Start the TERM program on the personal computer.

Transfer to the directory containing TERM.COM and MTERM.BAT and enter
MTERM[CR].

3) Enter as follows on the personal computer.

When the status is to be displayed only once : sts [Enter]
When the status is to be displayed periodically : csts [Enter]*

*: If you want to stop periodical display, you have to input: sts [Enter].

No. 2D201-102EN*B
213
3.5.2.1 Explanation of errors
(1) Error status data preceded by an asterisk
(Return status data m1 to m17)

For errors marked with (œ) in the error details list (m1 to m17 of the return status),
the corresponding functions cannot be executed after the error has occurred even
if attempts are made to retry execution. The errors are not released unless the
KGTSM is reset. Other errors are reset when requests for execution of the
corresponding functions are made again, and execution is attempted. If an error
recurs at this time, an error is set and sent to the SS/ADI2.

(2) When an error that does not allow reexecution (error having a œ mark) occurs for
horizontal movement (m5), gantry tilting (m7), or vertical movement (m12),
pressing the operating panel switch will stop the operation and make the indicator
flash. When the system is not in the interlock status (lamp is lit) and the indicator
flashes with the switch pressed, check the contents of the error referring to the
status details shown below:

*** dualport RAM cyclic status ***

done_sts=5252 (RR) off_sts=44 (D) rote_sts=52 (R) x_ray_sts=52 (R)

↓ ↓ ↓ ↓ ↓
(b1) (b2) (c) (d) (e)

bed_sts=52 (R) gns_sts=52 (R) err sts=3030303030303030(00000000)

↓ ↓ ↓
(f) (g) (h1) to (h8)

slid_inter=30 (0) hite_inter=30 (0) tilt_inter=30 (0)

↓ ↓ ↓
(i) (j) (k)

r_spd=3030 (00) x_ray_pos=31613563 (1a5c) sld_dsp=2b3030303030 (+00000)

↓ ↓ ↓ ↓
(l1) (l2) (m1) to (m4) (n1) to (n6)

hite_dsp=2b303633 (+063) tilt_dsp=2b303030 (+000) bombe=30 (0)

↓ ↓ ↓
(o1) to (o4) (p1) to (p4) (q)

free_lgt_sts=30 (0) preheat_cut=30 (0) req_sts=30 (0) pre_err=40 (@)

↓ ↓ ↓ ↓
(r) (s) (t) (u)

No. 2D201-102EN*B
214
*** dualport RAM return status ***

weg_rst=30 (0) das_rst=31 (1) slt_rst=31 (1) bmt_rst=3030 (00)

↓ ↓ ↓ ↓
(a) (b) (c) (d)(e)

gt_rst=30 (0) sld_sts=30 (0) hite_sts=30 (0) tilt_sts=30 (0) lite_sts=30 (0)
↓ ↓ ↓ ↓ ↓
(f) (g) (h) (i) (j)

sen_chk=303230303030 (020000) lgt_deg=2b363335 (+635)

↓ ↓
(k1) to (k6) (l1) to (l4)

mes_beam=40 (@) mes_slit=40 (@) mes_mode=40 (@) mes_wedge=40 (@)

↓ ↓ ↓ ↓
(m1) (m2) (m3) (m4)

mes_slide=40 (@) mes_rote=40 (@) mes_tilt=40 (@) mes_lite=40 (@)

↓ ↓ ↓ ↓
(m5) (m6) (m7) (m8)

mes_gns=40 (@) mes_main=40 (@) mes_das=40 (@) mes_hite=40 (@)

↓ ↓ ↓ ↓
(m9) (m10) (m11) (m12)

mes_power=40 (@) mes_mudat=40 (@) mes_gns_count=40 (@) mes_compre=40 (@)

↓ ↓ ↓ ↓
(m13) (m15) (m16) (m17)

scan_type=31 (1) view_rate=30343030 (0400) x_ray_pos=333435 (345)

↓ ↓ ↓
(n) (o1) to (o4) (p1) to (p3)

slide_mv_direct=32 (2) slide_mv_value=30303230 (0020)

↓ ↓
(q) (r1) to (r4)

view_count=303030373932 (000792) select puls=31 (1)

↓ ↓
(s1) to (s6) (t)

helical speed=2f2f2f2f (////) corrct=37 (7)

↓ ↓
(u1) to (u4) (v)

speed data=0x6a3f tilt data=0x201 slide speed data=0xec6

↓ ↓ ↓
(w) (x) (y)

fluoroscopy slide speed data=0x0

↓
(z)

No. 2D201-102EN*B
215
(3) Cyclic status

(b1) (b2) running status

The table shows the KGTSM status for various commands:

(b1) (b2) Content

R R Ready
P B PAS Busy
D (X) PAS DONE [ID (X)]
S B SCAN Busy
S T SCAN Table moving
S D SCAN DONE
U B UNIT Busy
M (X) UNIT DONE [ID (X)]
A B ABORT Busy
A D ABORT DONE
B B BREAK Busy
B D BREAK DONE
E B END Busy
E D END DONE
H B HEAD Busy
N (X) HEAD DONE [ID (X)]
L B LOG Busy
L D LOG DONE

(c) DAS offset status

The following are the offset status of the DAS:

R: Offset data can be acquired. (Ready)
B: Offset data acquisition in progress (Busy)
D: Offset acquisition completed (DONE)
E: Offset acquisition error (ERROR)

(d) Operating status of the gantry

This data indicates the operating status of the gantry:

R : The gantry is ready to rotate. (Ready)
B : The gantry is rotating. (Busy)

No. 2D201-102EN*B
216
 (e) X-ray ON/OFF status

This data indicates the status of the X-ray ON signal:

R : X-ray OFF (Ready)
B : X-ray ON (Busy)
A : X-ray OFF that has occurred as a result of exposure abort (Abort)

(f) Couch status

This data indicates the status of the couch:

R : The couch is ready to move. (Ready)
B : The couch is in motion. (Busy)

(g) OPCONT2 status

This data indicates the control status (OPCONT2) inside the gantry:
R : Ready for operation. (Ready)
B : Operation in progress. (Busy)

(h1) to (h8) Error status

These data indicate the error status:

D7 D6 D5 D4 D3 D2 D1 D0
(h1) 0 0 1 1 Beam Slit DAS mode Wedge
trimmer
(h2) 0 0 1 1 Horizontal Gantry Gantry tilting External light
movement of rotation projector
couch
(h3) 0 0 1 1 OPCONT2 Main DAS Vertical
movement of
couch
(h4) 0 0 1 1 GTS system (Cannot be MUDAT (Cannot be
used) used)
(h5) 0 0 1 1 COM-PRE (For future (For future (For future
expansion) expansion) expansion)
(h6) 0 0 1 1 (For future (For future (For future (For future
expansion) expansion) expansion) expansion)
(h7) 0 0 1 1 (For future (For future (For future (For future
expansion) expansion) expansion) expansion)
(h8) 0 0 1 1 (For future (For future (For future (For future
expansion) expansion) expansion) expansion)

When an error occurs, the corresponding bit

is set to "1".

No. 2D201-102EN*B
217
(i) Couch slide interlock

This data indicates slide interlock information of the couch.

(i) IN direction OUT direction

0 Movement possible Movement possible
1 Movement disabled Movement possible
2 Movement possible Movement disabled
3 Movement disabled Movement disabled

(j) Vertical movement interlocks of the couch

This data indicates interlock information of the vertical movements of the

couch.

(j) UP direction DOWN direction

0 Movement possible Movement possible
1 Movement disabled Movement possible
2 Movement possible Movement disabled
3 Movement disabled Movement disabled

(k) Gantry tilting interlocks

This data indicates interlock information of the gantry tilt.

(k) + direction - direction

0 Tilt possible Tilt possible
1 Tilt disabled Tilt possible
2 Tilt possible Tilt disabled
3 Tilt disabled Tilt disabled

(l1) (l2) Gantry rotation information

The following are gantry rotation status:

(l1) (l2) Gantry rotation status

0 0 Rotation stopped
B B Rotating speed changing
0 1 Rotating at 60 s/rotation (constant speed)
4 0 Rotating at 1.5 s/rotation (constant speed)
6 0 Rotating at 1.0 s/rotation (constant speed)
8 0 Rotating at 0.75 s/rotation (constant speed)

No. 2D201-102EN*B
218
(m1) to (m4) Tube position

The position of the tube in the gantry is indicated.

The gantry position pulse is expressed as a hexadecimal number after the

position detection sensor is turned OFF.

(m1) (m2) (m3) (m4)

Position pulse
1000's digit 100's digit 10's digit 1's digit

The position detection sensor is turned OFF at a tube angle of 120°.

(n1) to (n6) Position information of the couch top (horizontal)

(n1) Sliding position code

+ : Plus position (0 x 2B)

- : Minus position (0 x 2D)

(n2) to (n6) Sliding position (in millimeters)

(n2)(n3)(n4)(n5).(n6) mm

(o1) to (o4) Position information of the couch (vertical)

This data indicates the vertical position of the couch.

(o1) Couch height code

+ : Plus position (0 x 2B)

- : Minus position (0 x 2D)

(o2) to (o4) Couch height (in millimeters)

(o2)(o3)(o4) mm

(p1) to (p4) Tilt angle information of the gantry

(p1) Gantry tilt +/- mark

+ : Plus position (0 x 2B)

- : Minus position (0 x 2D)

(p2) to (p4) Tilt indication digits

(p2)(p3).(p4)°

(q) Cylinder status (not in use)

No. 2D201-102EN*B
219
(r) Couch FREE status and light projector status

(r) FREE status Projector status

0 OFF OFF
1 ON OFF
2 OFF ON
3 ON ON

(s) OUT-2 sensor status

0: The OUT-2 sensor is OFF.

1: The OUT-2 sensor is ON.

(t) Request status

This shows the status of control requests from KGTSM to SS/ADI2.

The eight bits from D7 to D0 are allocated in the following manner:

D7 D6 D5 D4 D3 D2 D1 D0

* For the above bits, 1 corresponds to the effective status.

D7: Fixed to 0
D6: Fixed to 0
D5: Fixed to 1
D4: Fixed to 1
D3: Not in use (for future expansion)
D2: Not in use (for future expansion)
D1: Request flag for home position
D0: Flag for 0 clearance

(u) COM-PRE status details

The eight bits from D7 to D0 are allocated in the following manner:

D7 D6 D5 D4 D3 D2 D1 D0
* For the above bits, 1 corresponds to the effective status.

D7: Fixed to 0
D6: Fixed to 1
D5: PRE operation abnormal or time-out
D4: Number of acquired views abnormal
D3: Parameter error
D2: Number of data in one view abnormal
D1: Low count when offset is corrected. *
D0: Offset overflow

* This will be generated when a metallic object is present or when

X-ray generation is stopped during scanning.

No. 2D201-102EN*B
220
(4) Return status

(a) Wedges

Setting value (a) Wedge

0 Undefined position
1 Normal
2 Small
3 Step
4 Flat
5 DR
; (0x3B) Busy
= (0x3D) Limit

(b) DAS mode

Indicates the DAS mode setting status.

(b) DAS mode For DSC-DAS

1 1200:2
2 1200:1
3 1800:2
4 1800:1
5 900:2
6 900:1
7 800:2
8 800:1
9 400:2
: (0x3A) Test mode
; (0x3B) EXT-CALIB
< (0x3C) RESET

No. 2D201-102EN*B
221
(c) Slit

Indicates the slit position status.

Settings (c) Slit

0 Position unknown
1 10 mm
2 5 mm
3 3 mm
4 2 mm
5 7 mm
6 0.8 mm
B (0 x 42) 1 mm
; (0 x 3B) Busy
= (0 x 3D) Limit

(d) Beam Trimmer 1

(e) Beam Trimmer 2

Indicates the beam trimmer position.

Setting value (d) Beam Trimmer 1 (e) Beam Trimmer 2

0 Undefined position Undefined position
1 Open Open
2 3 mm 3 mm
3 2 mm 2 mm
4 1 mm 1 mm
5 0.8 mm 0.8 mm
J (0x4a) 5 mm 5 mm
N (0x4e) 7 mm 7 mm
; (0x3B) Busy Busy
= (0x3D) Limit Limit

No. 2D201-102EN*B
222
(f) Light projector status

Indicates the lighting status of the projector.

(f) Internal light projector External light projector

0 OFF OFF
1 ON OFF
2 OFF ON
3 ON ON

(g) Horizontal movement status of the couch top

(h) Vertical movement status of the couch

(i) Tilt status of the gantry

(j) Tilt status of the external light projector

The following shows the operating status of each of the above:

Settings (g) (h) (i) (j)

Horizontal Vertical Gantry tilting External light
movement of movement of projector
couch top couch
0 (0 x 30) At halt At halt At halt At halt
; (0 x 3B) Movement in Movement in Movement in Movement in
progress progress progress progress

No. 2D201-102EN*B
223
 (k1) to (k6) Sensor status

The status of each sensor on the KGTSM is indicated.

D7 D6 D5 D4 D3 D2 D1 D0
(k1) 0 0 1 1 Tape switch Tape switch Mat switch at Mat switch at
at the lower at the lower the upper part the upper part
part of the part of the of the rear of of the rear of
rear of the front of the the gantry the gantry
gantry gantry
(k2) 0 0 1 1 TILT +LIMIT TILT +Max. TILT +0° TILT
tilt +Position
(k3) 0 0 1 1 TILT -LIMIT TILT -Max. tilt TILT -0° ⎯
(k4) 0 0 1 1 ⎯ HEIGHT0 IN1 Position
detection
sensor
(k5) 0 0 1 1 AUTO STOP HEIGHT2 HEIGHT1 UP LIMIT
(k6) 0 0 1 1 IN LIMIT OUT1 OUT LIMIT DOWN LIMIT

* In the above table, 1 corresponds to the sensor-ON setting.

(l1) to (l4) External light projector tilt angle indication (optional)

(1l) Projector tilt +/- mark

+ : Plus position (0 x 2B)

- : Minus position (0 x 2D)

(l2) to (l4) Tilt indication digits

(l2)(l3).(l4)°

(For errors marked with an asterisk, reexecution is not possible.

For other errors, operation is performed again when the corresponding
operating instruction is executed.)

(m1) Beam trimmer error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Not in use
D4: Not in use
D3: Pulse motor abnormal
D2: Software error
D1: Input parameter error
D0: Operating time-out

No. 2D201-102EN*B
224
(m2) Slit error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Not in use
D4: Not in use
D3: Pulse motor abnormal
D2: Software error
D1: Input parameter error
D0: Operating time-out

(m3) DAS mode error details

D7 D6 D5 D4 D3 D2 D1 D0

D7 : 0 fixed
D6 : 1 fixed
D5 to D2 : Not in use
D1 : Input parameter error
D0 : Operating time-out

(m4) Wedge error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Not in use
D4: Not in use
D3: Pulse motor abnormal
D2: Software error
D1: Input parameter error
D0: Operating time-out

(m5) Couch top horizontal movement error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Overrun/servo-amplifier abnormal/reverse-direction movement
(10 mm or more) œ
D4: Stop position error
D3: Watchdog error œ
D2: Operating time-out œ
D1: Data error
(specified movement range and autoslide values abnormal)
D0: Interlock terminated

No. 2D201-102EN*B
225
(m6) Gantry rotation error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Gantry stop position error
D4: Gantry speed error
D3: Servo-motor abnormal œ
D2: Position pulse time-out
D1: L1, L2 time-out
D0: Other errors

(m7) Gantry tilting error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Reverse movement (2° or more)/indicator angle data abnormal œ
D4: Limit error
D3: Watchdog error œ
D2: Tilt movement time-out/encoder time-out œ
D1: Data error (specified tilt angle error)
D0: Interlocks interrupted

(m8) Light projector

D7 D6 D5 D4 D3 D2 D1 D0

D7 : 0 fixed
D6 : 1 fixed
D5 to D0 : Not in use

(m9) OPCONT2 error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Communication error
D4: Software error
D3: Operation abnormal
(Refer to the wedge, slit, beam trimmer errors for details.)
D2: Communication time-out
D1: NAK received
D0: The specified number of communication retries exceeded

No. 2D201-102EN*B
226
(m10) Details of main errors

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Not in use
D4: Command error
D3: Dual port RAM error œ
D2: Hardware timer check error (checked at the time of starting) œ
D1: Message queue error (software error) œ
D0: System starting error (software error) œ

(m11) DAS error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: X-ray system error (X-RAY ON status continues even after X-ray
generation is terminated.)
D4: Gantry rotation system error
D3: Initialization error (DAS CCP)
D2: Time-out
D1: DAS CCP interrupt abnormal
D0: Software error or interruption of operation due to interlock activation

(m12) Couch vertical movement error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Reverse movement (10 mm or more) œ
D4: Not in use
D3: Watchdog error œ
D2: Vertical movement time-out œ
D1: Data error (Error in specified movement range)
D0: Interlocks interrupted

(m13) GTS system error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Not in use
D4: 100 V/200 V OFF
D3: SS/ADI2 hang-up
D2: Not in use
D1: Not in use
D0: Not in use

No. 2D201-102EN*B
227
(m15) MUDAT error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: Not in use
D4: Not in use
D3: Abnormal number of data sets in 1 view
D2: Not in use
D1: Data cannot be transferred from the stationary section to the rotation
section. (SOTROT FAIL) œ
D0: Data cannot be transferred from the rotation section to the stationary
section. (ROTSOT FAIL) œ

(m17) COM-PRE error details

D7 D6 D5 D4 D3 D2 D1 D0

D7: 0 fixed
D6: 1 fixed
D5: PRE operation abnormal or time-out
D4: Number of acquired views abnormal
D3: Parameter error
D2: Number of data within one view abnormal
D1: Low count when offset is corrected *
D0: Offset overflow

* This will be generated when a metallic object is present or when X-ray

generation is stopped during scanning.

(n) to (v) Scan parameters given by the system

(w) Gantry rotation speed data

The gantry rotation speed data is shown in hexadecimal numbers.

(x) Gantry tilt encoder angle information

The encoder value for the gantry tilt (current value of the angle) is expressed
in hexadecimal numbers. The relationship between the encoder values and
the actual angles is shown in table 3.5-1.

(y) Couch horizontal movement speed data

The couch horizontal movement speed data is expressed in hexadecimal

numbers.

(z) Couch speed information for CT fluoroscopy (not in use)

No. 2D201-102EN*B
228
 Table 3.5-1 Relationship between tilt encoder value and actual angle (1/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
005 -31.6875 to -31.7500 025 -29.6875 to -29.7500
006 -31.6250 to -31.6875 026 -29.6250 to -29.6875
007 -31.5625 to -31.6250 027 -29.5625 to -29.6250
-31.5 008 -31.5000 to -31.5625 -29.5 028 -29.5000 to -29.5625
009 -31.4375 to -31.5000 029 -29.4375 to -29.5000
00A -31.3750 to -31.4375 02A -29.3750 to -29.4375
00B -31.3125 to -31.3750 02B -29.3125 to -29.3750
00C -31.2500 to -31.3125 02C -29.2500 to -29.3125
00D -31.1875 to -31.2500 02D -29.1875 to -29.2500
00E -31.1250 to -31.1875 02E -29.1250 to -29.1875
00F -31.0625 to -31.1250 02F -29.0625 to -29.1250
-31.0 010 -31.0000 to -31.0625 -29.0 030 -29.0000 to -29.0625
No. 2D201-102EN*B

011 -30.9375 to -31.0000 031 -28.9375 to -29.0000

012 -30.8750 to -30.9375 032 -28.8750 to -28.9375
013 -30.8125 to -30.8750 033 -28.8125 to -28.8750
229

014 -30.7500 to -30.8125 034 -28.7500 to -28.8125

015 -30.6875 to -30.7500 035 -28.6875 to -28.7500
016 -30.6250 to -30.6875 036 -28.6250 to -28.6875
017 -30.5625 to -30.6250 037 -28.5625 to -28.6250
-30.5 018 -30.5000 to -30.5625 -28.5 038 -28.5000 to -28.5625
019 -30.4375 to -30.5000 039 -28.4375 to -28.5000
01A -30.3750 to -30.4375 03A -28.3750 to -28.4375
01B -30.3125 to -30.3750 03B -28.3125 to -28.3750
01C -30.2500 to -30.3125 03C -28.2500 to -28.3125
01D -30.1875 to -30.2500 03D -28.1875 to -28.2500
01E -30.1250 to -30.1875 03E -28.1250 to -28.1875
01F -30.0625 to -30.1250 03F -28.0625 to -28.1250
-32.0 000 -32.0000 to -32.0625 -30.0 020 -30.0000 to -30.0625 -28.0 040 -28.0000 to -28.0625
001 -31.9375 to -32.0000 021 -29.9375 to -30.0000 041 -27.9375 to -28.0000
002 -31.8750 to -31.9375 022 -29.8750 to -29.9375 042 -27.8750 to -27.9375
003 -31.8125 to -31.8750 023 -29.8125 to -29.8750 043 -27.8125 to -27.8750
004 -31.7500 to -31.8125 024 -29.7500 to -29.8125 044 -27.7500 to -27.8125
 Table 3.5-1 Relationship between tilt encoder value and actual angle (2/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
045 -27.6875 to -27.7500 065 -25.6875 to -25.7500 085 -23.6875 to -23.7500 0A5 -21.6875 to -21.7500
046 -27.6250 to -27.6875 066 -25.6250 to -25.6875 086 -23.6250 to -23.6875 0A6 -21.6250 to -21.6875
047 -27.5625 to -27.6250 067 -25.5625 to -25.6250 087 -23.5625 to -23.6250 0A7 -21.5625 to -21.6250
-27.5 048 -27.5000 to -27.5625 -25.5 068 -25.5000 to -25.5625 -23.5 088 -23.5000 to -23.5625 -21.5 0A8 -21.5000 to -21.5625
049 -27.4375 to -27.5000 069 -25.4375 to -25.5000 089 -23.4375 to -23.5000 0A9 -21.4375 to -21.5000
04A -27.3750 to -27.4375 06A -25.3750 to -25.4375 08A -23.3750 to -23.4375 0AA -21.3750 to -21.4375
04B -27.3125 to -27.3750 06B -25.3125 to -25.3750 08B -23.3125 to -23.3750 0AB -21.3125 to -21.3750
04C -27.2500 to -27.3125 06C -25.2500 to -25.3125 08C -23.2500 to -23.3125 0AC -21.2500 to -21.3125
04D -27.1875 to -27.2500 06D -25.1875 to -25.2500 08D -23.1875 to -23.2500 0AD -21.1875 to -21.2500
04E -27.1250 to -27.1875 06E -25.1250 to -25.1875 08E -23.1250 to -23.1875 0AE -21.1250 to -21.1875
04F -27.0625 to -27.1250 06F -25.0625 to -25.1250 08F -23.0625 to -23.1250 0AF -21.0625 to -21.1250
-27.0 050 -27.0000 to -27.0625 -25.0 070 -25.0000 to -25.0625 -23.0 090 -23.0000 to -23.0625 -21.0 0B0 -21.0000 to -21.0625
No. 2D201-102EN*B

051 -26.9375 to -27.0000 071 -24.9375 to -25.0000 091 -22.9375 to -23.0000 0B1 -20.9375 to -21.0000
052 -26.8750 to -26.9375 072 -24.8750 to -24.9375 092 -22.8750 to -22.9375 0B2 -20.8750 to -20.9375
053 -26.8125 to -26.8750 073 -24.8125 to -24.8750 093 -22.8125 to -22.8750 0B3 -20.8125 to -20.8750
230

054 -26.7500 to -26.8125 074 -24.7500 to -24.8125 094 -22.7500 to -22.8125 0B4 -20.7500 to -20.8125
055 -26.6875 to -26.7500 075 -24.6875 to -24.7500 095 -22.6875 to -22.7500 0B5 -20.6875 to -20.7500
056 -26.6250 to -26.6875 076 -24.6250 to -24.6875 096 -22.6250 to -22.6875 0B6 -20.6250 to -20.6875
057 -26.5625 to -26.6250 077 -24.5625 to -24.6250 097 -22.5625 to -22.6250 0B7 -20.5625 to -20.6250
-26.5 058 -26.5000 to -26.5625 -24.5 078 -24.5000 to -24.5625 -22.5 098 -22.5000 to -22.5625 -20.5 0B8 -20.5000 to -20.5625
059 -26.4375 to -26.5000 079 -24.4375 to -24.5000 099 -22.4375 to -22.5000 0B9 -20.4375 to -20.5000
05A -26.3750 to -26.4375 07A -24.3750 to -24.4375 09A -22.3750 to -22.4375 0BA -20.3750 to -20.4375
05B -26.3125 to -26.3750 07B -24.3125 to -24.3750 09B -22.3125 to -22.3750 0BB -20.3125 to -20.3750
05C -26.2500 to -26.3125 07C -24.2500 to -24.3125 09C -22.2500 to -22.3125 0BC -20.2500 to -20.3125
05D -26.1875 to -26.2500 07D -24.1875 to -24.2500 09D -22.1875 to -22.2500 0BD -20.1875 to -20.2500
05E -26.1250 to -26.1875 07E -24.1250 to -24.1875 09E -22.1250 to -22.1875 0BE -20.1250 to -20.1875
05F -26.0625 to -26.1250 07F -24.0625 to -24.1250 09F -22.0625 to -22.1250 0BF -20.0625 to -20.1250
-26.0 060 -26.0000 to -26.0625 -24.0 080 -24.0000 to -24.0625 -22.0 0A0 -22.0000 to -22.0625 -20.0 0C0 -20.0000 to -20.0625
061 -25.9375 to -26.0000 081 -23.9375 to -24.0000 0A1 -21.9375 to -22.0000 0C1 -19.9375 to -20.0000
062 -25.8750 to -25.9375 082 -23.8750 to -23.9375 0A2 -21.8750 to -21.9375 0C2 -19.8750 to -19.9375
063 -25.8125 to -25.8750 083 -23.8125 to -23.8750 0A3 -21.8125 to -21.8750 0C3 -19.8125 to -19.8750
064 -25.7500 to -25.8125 084 -23.7500 to -23.8125 0A4 -21.7500 to -21.8125 0C4 -19.7500 to -19.8125
 Table 3.5-1 Relationship between tilt encoder value and actual angle (3/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
0C5 -19.6875 to -19.7500 0E5 -17.6875 to -17.7500 105 -15.6875 to -15.7500 125 -13.6875 to -13.7500
0C6 -19.6250 to -19.6875 0E6 -17.6250 to -17.6875 106 -15.6250 to -15.6875 126 -13.6250 to -13.6875
0C7 -19.5625 to -19.6250 0E7 -17.5625 to -17.6250 107 -15.5625 to -15.6250 127 -13.5625 to -13.6250
-19.5 0C8 -19.5000 to -19.5625 -17.5 0E8 -17.5000 to -17.5625 -15.5 108 -15.5000 to -15.5625 -13.5 128 -13.5000 to -13.5625
0C9 -19.4375 to -19.5000 0E9 -17.4375 to -17.5000 109 -15.4375 to -15.5000 129 -13.4375 to -13.5000
0CA -19.3750 to -19.4375 0EA -17.3750 to -17.4375 10A -15.3750 to -15.4375 12A -13.3750 to -13.4375
0CB -19.3125 to -19.3750 0EB -17.3125 to -17.3750 10B -15.3125 to -15.3750 12B -13.3125 to -13.3750
0CC -19.2500 to -19.3125 0EC -17.2500 to -17.3125 10C -15.2500 to -15.3125 12C -13.2500 to -13.3125
0CD -19.1875 to -19.2500 0ED -17.1875 to -17.2500 10D -15.1875 to -15.2500 12D -13.1875 to -13.2500
0CE -19.1250 to -19.1875 0EE -17.1250 to -17.1875 10E -15.1250 to -15.1875 12E -13.1250 to -13.1875
0CF -19.0625 to -19.1250 0EF -17.0625 to -17.1250 10F -15.0625 to -15.1250 12F -13.0625 to -13.1250
-19.0 0D0 -19.0000 to -19.0625 -17.0 0F0 -17.0000 to -17.0625 -15.0 110 -15.0000 to -15.0625 -13.0 130 -13.0000 to -13.0625
No. 2D201-102EN*B

0D1 -18.9375 to -19.0000 0F1 -16.9375 to -17.0000 111 -14.9375 to -15.0000 131 -12.9375 to -13.0000
0D2 -18.8750 to -18.9375 0F2 -16.8750 to -16.9375 112 -14.8750 to -14.9375 132 -12.8750 to -12.9375
0D3 -18.8125 to -18.8750 0F3 -16.8125 to -16.8750 113 -14.8125 to -14.8750 133 -12.8125 to -12.8750
231

0D4 -18.7500 to -18.8125 0F4 -16.7500 to -16.8125 114 -14.7500 to -14.8125 134 -12.7500 to -12.8125
0D5 -18.6875 to -18.7500 0F5 -16.6875 to -16.7500 115 -14.6875 to -14.7500 135 -12.6875 to -12.7500
0D6 -18.6250 to -18.6875 0F6 -16.6250 to -16.6875 116 -14.6250 to -14.6875 136 -12.6250 to -12.6875
0D7 -18.5625 to -18.6250 0F7 -16.5625 to -16.6250 117 -14.5625 to -14.6250 137 -12.5625 to -12.6250
-18.5 0D8 -18.5000 to -18.5625 -16.5 0F8 -16.5000 to -16.5625 -14.5 118 -14.5000 to -14.5625 -12.5 138 -12.5000 to -12.5625
0D9 -18.4375 to -18.5000 0F9 -16.4375 to -16.5000 119 -14.4375 to -14.5000 139 -12.4375 to -12.5000
0DA -18.3750 to -18.4375 0FA -16.3750 to -16.4375 11A -14.3750 to -14.4375 13A -12.3750 to -12.4375
0DB -18.3125 to -18.3750 0FB -16.3125 to -16.3750 11B -14.3125 to -14.3750 13B -12.3125 to -12.3750
0DC -18.2500 to -18.3125 0FC -16.2500 to -16.3125 11C -14.2500 to -14.3125 13C -12.2500 to -12.3125
0DD -18.1875 to -18.2500 0FD -16.1875 to -16.2500 11D -14.1875 to -14.2500 13D -12.1875 to -12.2500
0DE -18.1250 to -18.1875 0FE -16.1250 to -16.1875 11E -14.1250 to -14.1875 13E -12.1250 to -12.1875
0DF -18.0625 to -18.1250 0FF -16.0625 to -16.1250 11F -14.0625 to -14.1250 13F -12.0625 to -12.1250
-18.0 0E0 -18.0000 to -18.0625 -16.0 100 -16.0000 to -16.0625 -14.0 120 -14.0000 to -14.0625 -12.0 140 -12.0000 to -12.0625
0E1 -17.9375 to -18.0000 101 -15.9375 to -16.0000 121 -13.9375 to -14.0000 141 -11.9375 to -12.0000
0E2 -17.8750 to -17.9375 102 -15.8750 to -15.9375 122 -13.8750 to -13.9375 142 -11.8750 to -11.9375
0E3 -17.8125 to -17.8750 103 -15.8125 to -15.8750 123 -13.8125 to -13.8750 143 -11.8125 to -11.8750
0E4 -17.7500 to -17.8125 104 -15.7500 to -15.8125 124 -13.7500 to -13.8125 144 -11.7500 to -11.8125
 Table 3.5-1 Relationship between tilt encoder value and actual angle (4/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
145 -11.6875 to -11.7500 165 -9.6875 to -9.7500 185 -7.6875 to -7.7500 1A5 -5.6875 to -5.7500
146 -11.6250 to -11.6875 166 -9.6250 to -9.6875 186 -7.6250 to -7.6875 1A6 -5.6250 to -5.6875
147 -11.5625 to -11.6250 167 -9.5625 to -9.6250 187 -7.5625 to -7.6250 1A7 -5.5625 to -5.6250
-11.5 148 -11.5000 to -11.5625 -9.5 168 -9.5000 to -9.5625 -7.5 188 -7.5000 to -7.5625 -5.5 1A8 -5.5000 to -5.5625
149 -11.4375 to -11.5000 169 -9.4375 to -9.5000 189 -7.4375 to -7.5000 1A9 -5.4375 to -5.5000
14A -11.3750 to -11.4375 16A -9.3750 to -9.4375 18A -7.3750 to -7.4375 1AA -5.3750 to -5.4375
14B -11.3125 to -11.3750 16B -9.3125 to -9.3750 18B -7.3125 to -7.3750 1AB -5.3125 to -5.3750
14C -11.2500 to -11.3125 16C -9.2500 to -9.3125 18C -7.2500 to -7.3125 1AC -5.2500 to -5.3125
14D -11.1875 to -11.2500 16D -9.1875 to -9.2500 18D -7.1875 to -7.2500 1AD -5.1875 to -5.2500
14E -11.1250 to -11.1875 16E -9.1250 to -9.1875 18E -7.1250 to -7.1875 1AE -5.1250 to -5.1875
14F -11.0625 to -11.1250 16F -9.0625 to -9.1250 18F -7.0625 to -7.1250 1AF -5.0625 to -5.1250
-11.0 150 -11.0000 to -11.0625 -9.0 170 -9.0000 to -9.0625 -7.0 190 -7.0000 to -7.0625 -5.0 1B0 -5.0000 to -5.0625
No. 2D201-102EN*B

151 -10.9375 to -11.0000 171 -8.9375 to -9.0000 191 -6.9375 to -7.0000 1B1 -4.9375 to -5.0000
152 -10.8750 to -10.9375 172 -8.8750 to -8.9375 192 -6.8750 to -6.9375 1B2 -4.8750 to -4.9375
153 -10.8125 to -10.8750 173 -8.8125 to -8.8750 193 -6.8125 to -6.8750 1B3 -4.8125 to -4.8750
232

154 -10.7500 to -10.8125 174 -8.7500 to -8.8125 194 -6.7500 to -6.8125 1B4 -4.7500 to -4.8125
155 -10.6875 to -10.7500 175 -8.6875 to -8.7500 195 -6.6875 to -6.7500 1B5 -4.6875 to -4.7500
156 -10.6250 to -10.6875 176 -8.6250 to -8.6875 196 -6.6250 to -6.6875 1B6 -4.6250 to -4.6875
157 -10.5625 to -10.6250 177 -8.5625 to -8.6250 197 -6.5625 to -6.6250 1B7 -4.5625 to -4.6250
-10.5 158 -10.5000 to -10.5625 -8.5 178 -8.5000 to -8.5625 -6.5 198 -6.5000 to -6.5625 -4.5 1B8 -4.5000 to -4.5625
159 -10.4375 to -10.5000 179 -8.4375 to -8.5000 199 -6.4375 to -6.5000 1B9 -4.4375 to -4.5000
15A -10.3750 to -10.4375 17A -8.3750 to -8.4375 19A -6.3750 to -6.4375 1BA -4.3750 to -4.4375
15B -10.3125 to -10.3750 17B -8.3125 to -8.3750 19B -6.3125 to -6.3750 1BB -4.3125 to -4.3750
15C -10.2500 to -10.3125 17C -8.2500 to -8.3125 19C -6.2500 to -6.3125 1BC -4.2500 to -4.3125
15D -10.1875 to -10.2500 17D -8.1875 to -8.2500 19D -6.1875 to -6.2500 1BD -4.1875 to -4.2500
15E -10.1250 to -10.1875 17E -8.1250 to -8.1875 19E -6.1250 to -6.1875 1BE -4.1250 to -4.1875
15F -10.0625 to -10.1250 17F -8.0625 to -8.1250 19F -6.0625 to -6.1250 1BF -4.0625 to -4.1250
-10.0 160 -10.0000 to -10.0625 -8.0 180 -8.0000 to -8.0625 -6.0 1A0 -6.0000 to -6.0625 -4.0 1C0 -4.0000 to -4.0625
161 -9.9375 to -10.0000 181 -7.9375 to -8.0000 1A1 -5.9375 to -6.0000 1C1 -3.9375 to -4.0000
162 -9.8750 to -9.9375 182 -7.8750 to -7.9375 1A2 -5.8750 to -5.9375 1C2 -3.8750 to -3.9375
163 -9.8125 to -9.8750 183 -7.8125 to -7.8750 1A3 -5.8125 to -5.8750 1C3 -3.8125 to -3.8750
164 -9.7500 to -9.8125 184 -7.7500 to -7.8125 1A4 -5.7500 to -5.8125 1C4 -3.7500 to -3.8125
 Table 3.5-1 Relationship between tilt encoder value and actual angle (5/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
1C5 -3.6875 to -3.7500 1E5 -1.6875 to -1.7500 205 0.2500 to 0.3125 225 2.2500 to 2.3125
1C6 -3.6250 to -3.6875 1E6 -1.6250 to -1.6875 206 0.3125 to 0.3750 226 2.3125 to 2.3750
1C7 -3.5625 to -3.6250 1E7 -1.5625 to -1.6250 207 0.3750 to 0.4375 227 2.3750 to 2.4375
-3.5 1C8 -3.5000 to -3.5625 -1.5 1E8 -1.5000 to -1.5625 0.5 208 0.4375 to 0.5000 2.5 228 2.4375 to 2.5000
1C9 -3.4375 to -3.5000 1E9 -1.4375 to -1.5000 209 0.5000 to 0.5625 229 2.5000 to 2.5625
1CA -3.3750 to -3.4375 1EA -1.3750 to -1.4375 20A 0.5625 to 0.6250 22A 2.5625 to 2.6250
1CB -3.3125 to -3.3750 1EB -1.3125 to -1.3750 20B 0.6250 to 0.6875 22B 2.6250 to 2.6875
1CC -3.2500 to -3.3125 1EC -1.2500 to -1.3125 20C 0.6875 to 0.7500 22C 2.6875 to 2.7500
1CD -3.1875 to -3.2500 1ED -1.1875 to -1.2500 20D 0.7500 to 0.8125 22D 2.7500 to 2.8125
1CE -3.1250 to -3.1875 1EE -1.1250 to -1.1875 20E 0.8125 to 0.8750 22E 2.8125 to 2.8750
1CF -3.0625 to -3.1250 1EF -1.0625 to -1.1250 20F 0.8750 to 0.9375 22F 2.8750 to 2.9375
-3.0 1D0 -3.0000 to -3.0625 -1.0 1F0 -1.0000 to -1.0625 1.0 210 0.9375 to 1.0000 3.0 230 2.9375 to 3.0000
No. 2D201-102EN*B

1D1 -2.9375 to -3.0000 1F1 -0.9375 to -1.0000 211 1.0000 to 1.0625 231 3.0000 to 3.0625
1D2 -2.8750 to -2.9375 1F2 -0.8750 to -0.9375 212 1.0625 to 1.1250 232 3.0625 to 3.1250
1D3 -2.8125 to -2.8750 1F3 -0.8125 to -0.8750 213 1.1250 to 1.1875 233 3.1250 to 3.1875
233

1D4 -2.7500 to -2.8125 1F4 -0.7500 to -0.8125 214 1.1875 to 1.2500 234 3.1875 to 3.2500
1D5 -2.6875 to -2.7500 1F5 -0.6875 to -0.7500 215 1.2500 to 1.3125 235 3.2500 to 3.3125
1D6 -2.6250 to -2.6875 1F6 -0.6250 to -0.6875 216 1.3125 to 1.3750 236 3.3125 to 3.3750
1D7 -2.5625 to -2.6250 1F7 -0.5625 to -0.6250 217 1.3750 to 1.4375 237 3.3750 to 3.4375
-2.5 1D8 -2.5000 to -2.5625 -0.5 1F8 -0.5000 to -0.5625 1.5 218 1.4375 to 1.5000 3.5 238 3.4375 to 3.5000
1D9 -2.4375 to -2.5000 1F9 -0.4375 to -0.5000 219 1.5000 to 1.5625 239 3.5000 to 3.5625
1DA -2.3750 to -2.4375 1FA -0.3750 to -0.4375 21A 1.5625 to 1.6250 23A 3.5625 to 3.6250
1DB -2.3125 to -2.3750 1FB -0.3125 to -0.3750 21B 1.6250 to 1.6875 23B 3.6250 to 3.6875
1DC -2.2500 to -2.3125 1FC -0.2500 to -0.3125 21C 1.6875 to 1.7500 23C 3.6875 to 3.7500
1DD -2.1875 to -2.2500 1FD -0.1875 to -0.2500 21D 1.7500 to 1.8125 23D 3.7500 to 3.8125
1DE -2.1250 to -2.1875 1FE -0.1250 to -0.1875 21E 1.8125 to 1.8750 23E 3.8125 to 3.8750
1DF -2.0625 to -2.1250 1FF -0.0625 to -0.1250 21F 1.8750 to 1.9375 23F 3.8750 to 3.9375
-2.0 1E0 -2.0000 to -2.0625 0 200 -0.0625 to 0 2.0 220 1.9375 to 2.0000 4.0 240 3.9375 to 4.0000
1E1 -1.9375 to -2.0000 201 0 to -0.0625 221 2.0000 to 2.0625 241 4.0000 to 4.0625
1E2 -1.8750 to -1.9375 202 0.0625 to 0.1250 222 2.0625 to 2.1250 242 4.0625 to 4.1250
1E3 -1.8125 to -1.8750 203 0.1250 to 0.1875 223 2.1250 to 2.1875 243 4.1250 to 4.1875
1E4 -1.7500 to -1.8125 204 0.1875 to 0.2500 224 2.1875 to 2.2500 244 4.1875 to 4.2500
 Table 3.5-1 Relationship between tilt encoder value and actual angle (6/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
245 4.2500 to 4.3125 265 6.2500 to 6.3125 285 8.2500 to 8.3125 2A5 10.2500 to 10.3125
246 4.3125 to 4.3750 266 6.3125 to 6.3750 286 8.3125 to 8.3750 2A6 10.3125 to 10.3750
247 4.3750 to 4.4375 267 6.3750 to 6.4375 287 8.3750 to 8.4375 2A7 10.3750 to 10.4375
4.5 248 4.4375 to 4.5000 6.5 268 6.4375 to 6.5000 8.5 288 8.4375 to 8.5000 10.5 2A8 10.4375 to 10.5000
249 4.5000 to 4.5625 269 6.5000 to 6.5625 289 8.5000 to 8.5625 2A9 10.5000 to 10.5625
24A 4.5625 to 4.6250 26A 6.5625 to 6.6250 28A 8.5625 to 8.6250 2AA 10.5625 to 10.6250
24B 4.6250 to 4.6875 26B 6.6250 to 6.6875 28B 8.6250 to 8.6875 2AB 10.6250 to 10.6875
24C 4.6875 to 4.7500 26C 6.6875 to 6.7500 28C 8.6875 to 8.7500 2AC 10.6875 to 10.7500
24D 4.7500 to 4.8125 26D 6.7500 to 6.8125 28D 8.7500 to 8.8125 2AD 10.7500 to 10.8125
24E 4.8125 to 4.8750 26E 6.8125 to 6.8750 28E 8.8125 to 8.8750 2AE 10.8125 to 10.8750
24F 4.8750 to 4.9375 26F 6.8750 to 6.9375 28F 8.8750 to 8.9375 2AF 10.8750 to 10.9375
5.0 250 4.9375 to 5.0000 7.0 270 6.9375 to 7.0000 9.0 290 8.9375 to 9.0000 11.0 2B0 10.9375 to 11.0000
No. 2D201-102EN*B

251 5.0000 to 5.0625 271 7.0000 to 7.0625 291 9.0000 to 9.0625 2B1 11.0000 to 11.0625
252 5.0625 to 5.1250 272 7.0625 to 7.1250 292 9.0625 to 9.1250 2B2 11.0625 to 11.1250
253 5.1250 to 5.1875 273 7.1250 to 7.1875 293 9.1250 to 9.1875 2B3 11.1250 to 11.1875
234

254 5.1875 to 5.2500 274 7.1875 to 7.2500 294 9.1875 to 9.2500 2B4 11.1875 to 11.2500
255 5.2500 to 5.3125 275 7.2500 to 7.3125 295 9.2500 to 9.3125 2B5 11.2500 to 11.3125
256 5.3125 to 5.3750 276 7.3125 to 7.3750 296 9.3125 to 9.3750 2B6 11.3125 to 11.3750
257 5.3750 to 5.4375 277 7.3750 to 7.4375 297 9.3750 to 9.4375 2B7 11.3750 to 11.4375
5.5 258 5.4375 to 5.5000 7.5 278 7.4375 to 7.5000 9.5 298 9.4375 to 9.5000 11.5 2B8 11.4375 to 11.5000
259 5.5000 to 5.5625 279 7.5000 to 7.5625 299 9.5000 to 9.5625 2B9 11.5000 to 11.5625
25A 5.5625 to 5.6250 27A 7.5625 to 7.6250 29A 9.5625 to 9.6250 2BA 11.5625 to 11.6250
25B 5.6250 to 5.6875 27B 7.6250 to 7.6875 29B 9.6250 to 9.6875 2BB 11.6250 to 11.6875
25C 5.6875 to 5.7500 27C 7.6875 to 7.7500 29C 9.6875 to 9.7500 2BC 11.6875 to 11.7500
25D 5.7500 to 5.8125 27D 7.7500 to 7.8125 29D 9.7500 to 9.8125 2BD 11.7500 to 11.8125
25E 5.8125 to 5.8750 27E 7.8125 to 7.8750 29E 9.8125 to 9.8750 2BE 11.8125 to 11.8750
25F 5.8750 to 5.9375 27F 7.8750 to 7.9375 29F 9.8750 to 9.9375 2BF 11.8750 to 11.9375
6.0 260 5.9375 to 6.0000 8.0 280 7.9375 to 8.0000 10.0 2A0 9.9375 to 10.0000 12.0 2C0 11.9375 to 12.0000
261 6.0000 to 6.0625 281 8.0000 to 8.0625 2A1 10.0000 to 10.0625 2C1 12.0000 to 12.0625
262 6.0625 to 6.1250 282 8.0625 to 8.1250 2A2 10.0625 to 10.1250 2C2 12.0625 to 12.1250
263 6.1250 to 6.1875 283 8.1250 to 8.1875 2A3 10.1250 to 10.1875 2C3 12.1250 to 12.1875
264 6.1875 to 6.2500 284 8.1875 to 8.2500 2A4 10.1875 to 10.2500 2C4 12.1875 to 12.2500
 Table 3.5-1 Relationship between tilt encoder value and actual angle (7/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
2C5 12.2500 to 12.3125 2E5 14.2500 to 14.3125 305 16.2500 to 16.3125 325 18.2500 to 18.3125
2C6 12.3125 to 12.3750 2E6 14.3125 to 14.3750 306 16.3125 to 16.3750 326 18.3125 to 18.3750
2C7 12.3750 to 12.4375 2E7 14.3750 to 14.4375 307 16.3750 to 16.4375 327 18.3750 to 18.4375
12.5 2C8 12.4375 to 12.5000 14.5 2E8 14.4375 to 14.5000 16.5 308 16.4375 to 16.5000 18.5 328 18.4375 to 18.5000
2C9 12.5000 to 12.5625 2E9 14.5000 to 14.5625 309 16.5000 to 16.5625 329 18.5000 to 18.5625
2CA 12.5625 to 12.6250 2EA 14.5625 to 14.6250 30A 16.5625 to 16.6250 32A 18.5625 to 18.6250
2CB 12.6250 to 12.6875 2EB 14.6250 to 14.6875 30B 16.6250 to 16.6875 32B 18.6250 to 18.6875
2CC 12.6875 to 12.7500 2EC 14.6875 to 14.7500 30C 16.6875 to 16.7500 32C 18.6875 to 18.7500
2CD 12.7500 to 12.8125 2ED 14.7500 to 14.8125 30D 16.7500 to 16.8125 32D 18.7500 to 18.8125
2CE 12.8125 to 12.8750 2EE 14.8125 to 14.8750 30E 16.8125 to 16.8750 32E 18.8125 to 18.8750
2CF 12.8750 to 12.9375 2EF 14.8750 to 14.9375 30F 16.8750 to 16.9375 32F 18.8750 to 18.9375
13.0 2D0 12.9375 to 13.0000 15.0 2F0 14.9375 to 15.0000 17.0 310 16.9375 to 17.0000 19.0 330 18.9375 to 19.0000
No. 2D201-102EN*B

2D1 13.0000 to 13.0625 2F1 15.0000 to 15.0625 311 17.0000 to 17.0625 331 19.0000 to 19.0625
2D2 13.0625 to 13.1250 2F2 15.0625 to 15.1250 312 17.0625 to 17.1250 332 19.0625 to 19.1250
2D3 13.1250 to 13.1875 2F3 15.1250 to 15.1875 313 17.1250 to 17.1875 333 19.1250 to 19.1875
235

2D4 13.1875 to 13.2500 2F4 15.1875 to 15.2500 314 17.1875 to 17.2500 334 19.1875 to 19.2500
2D5 13.2500 to 13.3125 2F5 15.2500 to 15.3125 315 17.2500 to 17.3125 335 19.2500 to 19.3125
2D6 13.3125 to 13.3750 2F6 15.3125 to 15.3750 316 17.3125 to 17.3750 336 19.3125 to 19.3750
2D7 13.3750 to 13.4375 2F7 15.3750 to 15.4375 317 17.3750 to 17.4375 337 19.3750 to 19.4375
13.5 2D8 13.4375 to 13.5000 15.5 2F8 15.4375 to 15.5000 17.5 318 17.4375 to 17.5000 19.5 338 19.4375 to 19.5000
2D9 13.5000 to 13.5625 2F9 15.5000 to 15.5625 319 17.5000 to 17.5625 339 19.5000 to 19.5625
2DA 13.5625 to 13.6250 2FA 15.5625 to 15.6250 31A 17.5625 to 17.6250 33A 19.5625 to 19.6250
2DB 13.6250 to 13.6875 2FB 15.6250 to 15.6875 31B 17.6250 to 17.6875 33B 19.6250 to 19.6875
2DC 13.6875 to 13.7500 2FC 15.6875 to 15.7500 31C 17.6875 to 17.7500 33C 19.6875 to 19.7500
2DD 13.7500 to 13.8125 2FD 15.7500 to 15.8125 31D 17.7500 to 17.8125 33D 19.7500 to 19.8125
2DE 13.8125 to 13.8750 2FE 15.8125 to 15.8750 31E 17.8125 to 17.8750 33E 19.8125 to 19.8750
2DF 13.8750 to 13.9375 2FF 15.8750 to 15.9375 31F 17.8750 to 17.9375 33F 19.8750 to 19.9375
14.0 2E0 13.9375 to 14.0000 16.0 300 15.9375 to 16.0000 18.0 320 17.9375 to 18.0000 20.0 340 19.9375 to 20.0000
2E1 14.0000 to 14.0625 301 16.0000 to 16.0625 321 18.0000 to 18.0625 341 20.0000 to 20.0625
2E2 14.0625 to 14.1250 302 16.0625 to 16.1250 322 18.0625 to 18.1250 342 20.0625 to 20.1250
2E3 14.1250 to 14.1875 303 16.1250 to 16.1875 323 18.1250 to 18.1875 343 20.1250 to 20.1875
2E4 14.1875 to 14.2500 304 16.1875 to 16.2500 324 18.1875 to 18.2500 344 20.1875 to 20.2500
 Table 3.5-1 Relationship between tilt encoder value and actual angle (8/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
345 20.2500 to 20.3125 365 22.2500 to 22.3125 385 24.2500 to 24.3125 3A5 26.2500 to 26.3125
346 20.3125 to 20.3750 366 22.3125 to 22.3750 386 24.3125 to 24.3750 3A6 26.3125 to 26.3750
347 20.3750 to 20.4375 367 22.3750 to 22.4375 387 24.3750 to 24.4375 3A7 26.3750 to 26.4375
20.5 348 20.4375 to 20.5000 22.5 368 22.4375 to 22.5000 24.5 388 24.4375 to 24.5000 26.5 3A8 26.4375 to 26.5000
349 20.5000 to 20.5625 369 22.5000 to 22.5625 389 24.5000 to 24.5625 3A9 26.5000 to 26.5625
34A 20.5625 to 20.6250 36A 22.5625 to 22.6250 38A 24.5625 to 24.6250 3AA 26.5625 to 26.6250
34B 20.6250 to 20.6875 36B 22.6250 to 22.6875 38B 24.6250 to 24.6875 3AB 26.6250 to 26.6875
34C 20.6875 to 20.7500 36C 22.6875 to 22.7500 38C 24.6875 to 24.7500 3AC 26.6875 to 26.7500
34D 20.7500 to 20.8125 36D 22.7500 to 22.8125 38D 24.7500 to 24.8125 3AD 26.7500 to 26.8125
34E 20.8125 to 20.8750 36E 22.8125 to 22.8750 38E 24.8125 to 24.8750 3AE 26.8125 to 26.8750
34F 20.8750 to 20.9375 36F 22.8750 to 22.9375 38F 24.8750 to 24.9375 3AF 26.8750 to 26.9375
21.0 350 20.9375 to 21.0000 23.0 370 22.9375 to 23.0000 25.0 390 24.9375 to 25.0000 27.0 3B0 26.9375 to 27.0000
No. 2D201-102EN*B

351 21.0000 to 21.0625 371 23.0000 to 23.0625 391 25.0000 to 25.0625 3B1 27.0000 to 27.0625
352 21.0625 to 21.1250 372 23.0625 to 23.1250 392 25.0625 to 25.1250 3B2 27.0625 to 27.1250
353 21.1250 to 21.1875 373 23.1250 to 23.1875 393 25.1250 to 25.1875 3B3 27.1250 to 27.1875
236

354 21.1875 to 21.2500 374 23.1875 to 23.2500 394 25.1875 to 25.2500 3B4 27.1875 to 27.2500
355 21.2500 to 21.3125 375 23.2500 to 23.3125 395 25.2500 to 25.3125 3B5 27.2500 to 27.3125
356 21.3125 to 21.3750 376 23.3125 to 23.3750 396 25.3125 to 25.3750 3B6 27.3125 to 27.3750
357 21.3750 to 21.4375 377 23.3750 to 23.4375 397 25.3750 to 25.4375 3B7 27.3750 to 27.4375
21.5 358 21.4375 to 21.5000 23.5 378 23.4375 to 23.5000 25.5 398 25.4375 to 25.5000 27.5 3B8 27.4375 to 27.5000
359 21.5000 to 21.5625 379 23.5000 to 23.5625 399 25.5000 to 25.5625 3B9 27.5000 to 27.5625
35A 21.5625 to 21.6250 37A 23.5625 to 23.6250 39A 25.5625 to 25.6250 3BA 27.5625 to 27.6250
35B 21.6250 to 21.6875 37B 23.6250 to 23.6875 39B 25.6250 to 25.6875 3BB 27.6250 to 27.6875
35C 21.6875 to 21.7500 37C 23.6875 to 23.7500 39C 25.6875 to 25.7500 3BC 27.6875 to 27.7500
35D 21.7500 to 21.8125 37D 23.7500 to 23.8125 39D 25.7500 to 25.8125 3BD 27.7500 to 27.8125
35E 21.8125 to 21.8750 37E 23.8125 to 23.8750 39E 25.8125 to 25.8750 3BE 27.8125 to 27.8750
35F 21.8750 to 21.9375 37F 23.8750 to 23.9375 39F 25.8750 to 25.9375 3BF 27.8750 to 27.9375
22.0 360 21.9375 to 22.0000 24.0 380 23.9375 to 24.0000 26.0 3A0 25.9375 to 26.0000 28.0 3C0 27.9375 to 28.0000
361 22.0000 to 22.0625 381 24.0000 to 24.0625 3A1 26.0000 to 26.0625 3C1 28.0000 to 28.0625
362 22.0625 to 22.1250 382 24.0625 to 24.1250 3A2 26.0625 to 26.1250 3C2 28.0625 to 28.1250
363 22.1250 to 22.1875 383 24.1250 to 24.1875 3A3 26.1250 to 26.1875 3C3 28.1250 to 28.1875
364 22.1875 to 22.2500 384 24.1875 to 24.2500 3A4 26.1875 to 26.2500 3C4 28.1875 to 28.2500
 Table 3.5-1 Relationship between tilt encoder value and actual angle (9/9)

Display Encoder Display Encoder Display Encoder Display Encoder

angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG) angle value Actual angle (DEG)
(DEG) (HEX) (DEG) (HEX) (DEG) (HEX) (DEG) (HEX)
3C5 28.2500 to 28.3125 3E5 30.2500 to 30.3125
3C6 28.3125 to 28.3750 3E6 30.3125 to 30.3750
3C7 28.3750 to 28.4375 3E7 30.3750 to 30.4375
28.5 3C8 28.4375 to 28.5000 30.5 3E8 30.4375 to 30.5000
3C9 28.5000 to 28.5625 3E9 30.5000 to 30.5625
3CA 28.5625 to 28.6250 3EA 30.5625 to 30.6250
3CB 28.6250 to 28.6875 3EB 30.6250 to 30.6875
3CC 28.6875 to 28.7500 3EC 30.6875 to 30.7500
3CD 28.7500 to 28.8125 3ED 30.7500 to 30.8125
3CE 28.8125 to 28.8750 3EE 30.8125 to 30.8750
3CF 28.8750 to 28.9375 3EF 30.8750 to 30.9375
No. 2D201-102EN*B

29.0 3D0 28.9375 to 29.0000 31.0 3F0 30.9375 to 31.0000

3D1 29.0000 to 29.0625 3F1 31.0000 to 31.0625
3D2 29.0625 to 29.1250 3F2 31.0625 to 31.1250
237

3D3 29.1250 to 29.1875 3F3 31.1250 to 31.1875

3D4 29.1875 to 29.2500 3F4 31.1875 to 31.2500
3D5 29.2500 to 29.3125 3F5 31.2500 to 31.3125
3D6 29.3125 to 29.3750 3F6 31.3125 to 31.3750
3D7 29.3750 to 29.4375 3F7 31.3750 to 31.4375
29.5 3D8 29.4375 to 29.5000 31.5 3F8 31.4375 to 31.5000
3D9 29.5000 to 29.5625 3F9 31.5000 to 31.5625
3DA 29.5625 to 29.6250 3FA 31.5625 to 31.6250
3DB 29.6250 to 29.6875 3FB 31.6250 to 31.6875
3DC 29.6875 to 29.7500 3FC 31.6875 to 31.7500
3DD 29.7500 to 29.8125 3FD 31.7500 to 31.8125
3DE 29.8125 to 29.8750 3FE 31.8125 to 31.8750
3DF 29.8750 to 29.9375 3FF 31.8750 to 31.9375
30.0 3E0 29.9375 to 30.0000 32.0
3E1 30.0000 to 30.0625
3E2 30.0625 to 30.1250
3E3 30.1250 to 30.1875
3E4 30.1875 to 30.2500
3.5.3 KGTSM timer checks (including timer errors)
The KGTSM PWB has five 15-channel function-control timers. The KGTSM checks the
operations of these timers in the initial sequence when the KGTSM power is turned ON
and outputs the result (message) to the personal computer.

<Tools required>

(1) Personal computer

(2) Service cable (GR-1, as standard)

(3) Programs: TERM.COM and MTERM.BAT

<Procedures for checking timer functions>

(Same as the procedures for reading KGTSM messages)

(1) Connect the personal computer to connector CN404 of the KGTSM PWB with the
service cable.

(2) Start the TERM program on the personal computer.

(3) Turn ON the power to the gantry. (If the gantry power is already ON, turn OFF the
power to the gantry, wait a moment, then turn ON the power to the gantry.)

(4) Check the message on the personal computer.

(a) "Timer check start Timer check done"

This message indicates that the timer check has ended normally.

(b) "INIT: Timer Fail"

This message indicates that timer check was defective.

3.5.3.1 Timer error

If any channel is found defective in the initial sequence timer check, the KGTSM turns
ON bit D2 of the m10 error status message and becomes disabled.

No. 2D201-102EN*B
238
3.6 Gantry Rotation
The servicing of the gantry rotation section is described in this section.

DANGER: 1. When servicing is to be performed with the gantry cover

open, be sure to turn OFF the power of the system at the
distribution board and wait for five minutes or more to
prevent workers from receiving electric shocks or being
injured due to unexpected system operations.

2. If it is necessary to perform servicing with the system

turned ON, supply power only to the required parts. At the
same time, take safety measures such as turning OFF the
power of the cover switch and NFB120 (power to the
rotation servo motor).

3.6.1 Stop position and methods for brake release

3.6.1.1 Asteion stop position

There are five stop positions of the Asteion gantry rotation section:

(1) Top (0°)

-15 ° 0°
(2) Right side (90°)

(3) Bottom (180°)

(4) Left side (270°)

270 ° 90°
(5) Home position (-15°)

180°

• The X-ray tube is stopped at the home position (-15°) after continuous rotation of
the gantry.
At this position the positioning projector can be accurately aligned with the
patient.

• If the X-ray tube is not at the home position during scanoscopy or if any problem
occurs, the tube can be moved to the home position by holding the home
position key on the operating panel pressed for two seconds or more. The tube
moves at a speed of two seconds per rotation. (This function, however, is only
available when the console is active.)

No. 2D201-102EN*B
239
3.6.1.2 Brake release method
The gantry rotation motor is provided with a brake. To turn the rotation section
manually, release the brake as described in the steps below. Be sure to release the
brake, because turning the rotation section without releasing the brake may lead to
brake malfunctions.

<Brake release procedure>

(1) Set breaker CP1 at the rear lower left of the gantry to ON (the power is fully
supplied).

(2) Set servo amplifier breaker CP320 to OFF (power supply to the motor is disabled).

• If it is not necessary to supply power to the inside of the rotor (HFG, DAS, etc.),
be sure to set breaker NFB2 at the rear lower right of the gantry to OFF.

Step (2) is mandatory to ensure safety.

(3) Set the brake release switch SW326

Rear of the gantry
at the servo amplifier section to the
upward position. The brake is then
released and the rotation section can
be turned manually.

(4) After all procedures are completed,

set SW326 downward and reset the
brake to the lock position.
ON ON OFF

OFF

CP1 NFB2

Front of the gantry

Brake release SW
SW326

Servo breaker
CP320

No. 2D201-102EN*B
240
3.6.2 Gantry rotation interlock (when the gantry cover is opened)
When any one of the front cover, left side cover (viewed from the front), or rear upper
cover of the gantry is opened, the cover switch is set to OFF and gantry rotation is
disabled.

To rotate the gantry with a cover opened, set the "Enable" switch (SW320) to ON
(upward). The corresponding rotation warning lamp is then lit.

Î Refer to table 3.6-1 "List of

the gantry cover interlocks".

Rotation warning lamp

Front of the gantry

Cover SW:
MS320
Enable SW:
SW320

NOTE: 1. If a servo error is detected by the KGTSM, the status of that error is
retained as is, and the gantry cannot be rotated by operation from the
console even if the rotation enable status is entered.
This error is resolved by resetting the KGTSM or rotating the gantry once
using the maintenance panel on the KGTSM PWB.
2. Be sure to set the enable switch (SW320) downward when the gantry
covers are closed. If the cover is closed with this switch set to the upward
position, the gantry cannot be rotated.

No. 2D201-102EN*B
241
 Table 3.6-1 List of the gantry cover interlocks

Conditions Gantry status

Front cover KGTSM PWB
No. Rotation Rotation Power
Gantry Remarks
breaker Cover SW Enable SW warning LED Error contactor Description of use
rotation
CP320 MS320 SW320 lamp message MC320
LED38 LED37
1 OFF * * OFF ON OFF 60 OFF Disabled Maintenance: Recommended
settings when access to the rotation
section is required.
2 ON ON Downward OFF ON ON None ON Enabled Status in normal use: Status in which
(Normal) the cover is closed.
3 ON OFF Downward OFF ON OFF 60 OFF Disabled Maintenance: Status in which the
(Normal) cover is open.
No. 2D201-102EN*B

4 ON OFF Upward ON ON ON None ON Enabled Maintenance: Forcibly sets the status

in which rotation is permitted when
the front cover is open.
242

5 ON ON Upward OFF ON OFF 60 OFF Disabled Setting error: When the front cover is
closed, the enable switch must be set
to the lower position (NORMAL).

(1) Cover switch : ON = With the cover closed.

OFF = When the cover is opened.
(2) Enable (rotation) switch : Upward = Gantry rotation is enabled when the cover is opened.
Downward = Gantry rotation is disabled when the cover is opened.
(3) Rotation warning lamp : ON = Gantry rotation is enabled when the cover is opened and disabled when the cover is closed.
OFF = Gantry rotation is disabled when the cover is opened and enabled when the cover is closed.
(4) KGTSM LED38 : ON = The gantry rotation enable signal is being output.
OFF = The gantry rotation enable signal is not output.
(5) KGTSM LED37 : ON = The servo is in good condition and the gantry can be rotated.
OFF = Indicates that servo condition is not good and gantry rotation is disabled.
(6) Contactor MC320 : ON = 200 V is supplied for driving the servo amplifier.
OFF = 200 V is not supplied for driving.
3.6.3 Offsets and rotation speed of the gantry servo motor

3.6.3.1 Offset and speed checks

The offset and speed of the gantry servo motor must be checked and adjusted in the
following cases:

(1) Offset check and adjustment

When the system is installed, when the KGTSM PWB is replaced, or when the
servo amplifier is replaced, perform offset check and adjustment.

(2) Check and adjustment of rotation speed of the gantry

When the system is installed, when periodic maintenance is performed, when the
KGTSM PWB is replaced, when the servo amplifier is replaced, or when a speed
error or a stop position error occurs, check and adjust the rotation speed.

The procedures to adjust the rotation speed of the gantry are given below.

Î See subsection 3.6.4 for procedures to

check the rotation speed of the gantry.

(a) Check and adjustment of offsets

Î See subsection 3.6.5.

(b) Check of servo voltage on the KGTSM PWB

This check is always required when a servo error occurs or when the KGTSM
PWB is replaced.
Î See subsection 3.6.7.

(c) Adjustment of rotation speed of the gantry by the servo amplifier

Î See subsection 3.6.6.

No. 2D201-102EN*B
243
3.6.3.2 Check and adjustment of the rotation speed of the gantry
The KGTSM has a function to check and adjust the rotation speed of the gantry. After
the gantry starts to rotate and acceleration to the specified rotation speed is completed,
the KGTSM checks its rotation speed and performs the following according to the
speed:

(1) When the rotation speed is within ±3% : Normal. The KGTSM allows the gantry to
of the specified speed continue rotating.

(2) When the rotation speed is more than : Speed error. The KGTSM stops the
gantry.
10% higher or lower than the specified
speed

(3) When the rotation speed is 3% to 10% : The KGTSM corrects the rotation speed.
higher or lower than the specified After a delay of 1.5 seconds, the GTS
speed checks the rotation speed again.
If the rotation speed
error is within ±3% of
the specified speed, the
First speed check Second speed check KGTSM allows the
gantry to continue
rotating. If the rotation
(only when the rotation speed is more than
speed error is between 10% higher or lower
3% and 10% of the than the specified
Start of rotation specified speed) speed, the KGTSM
stops the gantry.
1.5 s

Figure 3.6-1 Gantry rotation speed curve

No. 2D201-102EN*B
244
3.6.4 Gantry rotation speed check
This subsection describes procedures to check the rotation speed of the gantry.
The rotation speed of the gantry at the start-up of the gantry, speed data, and required
speed correction can be obtained by executing a speed check.

NOTE: Be careful when rotating the gantry.

<Tools required>

(1) Personal computer

(2) Service cable (GR-1, as standard)

(3) Programs: TERM.COM and MTERM.BAT

<Procedures to check the rotation speed of the gantry>

(1) Connect the personal computer to

connector CN404 of the KGTSM PWB
with the service cable.
CN404
(2) Start the TERM program on the personal KGTS PWB
PC
computer.
Enter "MTERM [CR]" in the directory
containing TERM.COM and
MTERM.BAT.
(1)

(3) Enter as needed from the maintenance panel (or the console) to rotate the gantry
at a speed of 1.5 seconds per rotation.

1) Set the lever of the PANEL switch (SW1) to ON (downward).

2) Set "8" (SCAN) on switch SW32.

3) Set switch SW31 to "3" (1.5 seconds per rotation), "4" (1.0 second per rotation),
or "5" (0.75 second per rotation).

4) Press the SET switch (SW11) and the SCAN switch (SW12) at the same time
and hold them down. The gantry starts to rotate.

5) Release the SET switch and the SCAN switch to stop the gantry from rotating.

No. 2D201-102EN*B
245
 CAUTION: 1. When checking or performing fine adjustment of the gantry rotation
speed, observe the following precautions.

• Do not set the panel switch (SW1) to OFF (upward) before all
operations from the maintenance panel are completed.

• After using the maintenance panel, be sure to set the panel

switch OFF and reset the KGTSM.

2. Do not perform continuous scanning (that is, a set of start and stop
operations performed consecutively) more than ten times. Doing
so may damage the servo-amplifier.
If repetitions of continuous scanning are required, stop for two
minutes after scanning is performed ten times.

(4) 5 seconds after the gantry starts to rotate, read the KGTSM message on the
personal computer.

• If the error of the rotation speed of the gantry is ±3% or less

Read the current gantry speed and the standard gantry speed on the personal
computer and compare them. When the error is ±3% or less, the KGTSM
allows the gantry to keep on rotating.

ROTE : current : 0 x ΔΔΔΔ std : Standard rotation speed

↓
Current rotation speed of the gantry (Should be as
close to Standard rotation speed as possible)

Standard rotation speed

• 0.75, 1.0 second per rotation : 0x033F

• 1.5 seconds per rotation : 0x04E0

• If the error of the rotation speed of the gantry is between 3% and 10%

A message indicating that the rotation speed is being corrected by the KGTSM
is displayed. (Two speed check messages are output.)

If the error of the corrected rotation speed of the gantry is not corrected to within
±3%, the KGTSM stops the gantry from rotating.

ROTE : current : 0 x ΔΔΔΔ std : Standard rotation speed

↓
Rotation speed measured by the first speed check

ROTE : current : 0 x †††† std : Standard rotation speed (adjust)

↓
Rotation speed after correction

No. 2D201-102EN*B
246
• If the error of the rotation speed of the gantry is 10% or more

The KGTSM outputs the following message and stops the rotation of the gantry.

ROTE : speed error : 0 x ΔΔΔΔ std : Standard rotation speed

↓
Rotation speed of the gantry

Gantry rotation speed data: 0.75-, 1.0-second system

+10% 0x 0392 The current rotation speed of the gantry is 10%

slower than the standard speed.

+3% 0x 0358 The current rotation speed of the gantry is 3%

slower than the standard speed.

Standard 0x 033F The current rotation speed is exactly equal to the

standard speed.

-3% 0x 0326 The current rotation speed of the gantry is 3%

faster than the standard speed.

-10% 0x 02EC The current rotation speed of the gantry is 10%

faster than the standard speed.

Gantry rotation speed data: 1.5-second system

+10% 0x 055C The current rotation speed of the gantry is 10%

slower than the standard speed.

+3% 0x 0505 The current rotation speed of the gantry is 3%

slower than the standard speed.

Standard 0x 04E0 The current rotation speed is exactly equal to the

standard speed.

-3% 0x 04BA The current rotation speed of the gantry is 3%

faster than the standard speed.

-10% 0x 0463 The current rotation speed of the gantry is 10%

faster than the standard speed.

No. 2D201-102EN*B
247
3.6.5 Adjustment of the gantry servo-amplifier offset

3.6.5.1 Preparation
<Preparation procedure>

(1) Turn OFF the breaker CP1 beneath the rear left of the gantry.

(2) Open the gantry front cover. Turn OFF the servo amplifier breaker CP320.

(3) Open the side cover on the servo-unit side (left front of the gantry).

(4) Remove the servo unit metal cover.

(5) Turn ON the breaker CP1.

(6) Turn ON the servo amplifier breaker CP320.

(7) Confirm that each unit of the gantry is powered ON.

(8) Set rotation enable switch SW320 to ON (upward). The rotation warning lamp
lights.

No. 2D201-102EN*B
248
3.6.5.2 Offset verification
<Verification procedure>

(1) Turn OFF the servo amplifier breaker CP320.

(2) After the breaker CP1 is turned OFF beneath the rear left of the gantry, change the
KGTSM PWB DSW10 setting as follows:

DSW10 1 2 3 4
ON
The DSW10 ON/OFF OFF
position usually set

The DSW10 ON/OFF 1 2 3 4

position set after offset ON
OFF
DSW10 verification

(3) Turn ON breaker CP1, release the brake by setting the brake release switch
SW326 to the upper position, and then turn ON breaker CP320. Be extremely
careful as the gantry may rotate accidentally.

Æ The digital operator panel display " " will then appear.

Æ Leave the display for three minutes as is and verify that the rotation section
does not move.
If the rotation section moves in the positive or negative direction, it is assumed
to be incorrect.

(4) Turn OFF breaker CP320, engage the brake again by setting the brake release
switch to the lower position ("NORMAL" position), and then turn OFF breaker CP1.

(5) Restore the KGTSM PWB DSW10 setting to normal status.

(6) Turn ON the breakers CP1 and CP320 in order.

Æ The panel display " " will then appear.

NOTE: If offset is incorrect, perform offset adjustment again, as described in

subsection 3.6.5.3.

No. 2D201-102EN*B
249
3.6.5.3 Speed command offset adjustment
<Adjustment procedure>

(1) Follow the procedures described in (1) to (3) of subsection 3.6.5.2 to set DSW10
on the KGTSM PWB to the settings for checking. The servo pack is set to servo
ON status by the command from the KGTSM PWB.

(2) Press the MODE/SET key to set auxiliary function execution mode.

Status display mode

Auxiliary function execution mode

(3) Press the (UP) or (DOWN) key to set the user constant number to be set to
Fn009.

(4) Hold down the DATA/ key for more than 1 second. The following display
appears.

(5) When the key is pressed, the following display blinks for 1
second and the speed command offset is automatically adjusted.

Blinks for 1 second. →

(6) Hold down the DATA/ key again for more than 1 second. The system returns to
auxiliary function execution mode.

(7) Turn the servo amplifier breaker CP320 OFF and then ON again.

This completes speed command offset adjustment.

(8) Turn OFF breaker CP1 located at the lower left of the rear of the gantry and return
the settings of DSW10 on the KGTSM PWB to the standard settings as described
in subsection 3.6.5.2.
(The brake setting must have been returned to its original status by setting the
brake release switch SW326 to the lower (NORMAL) position.)

CAUTION: After offset adjustment is completed, be sure to return DSW10 on the

KGTSM PWB to its normal setting.

No. 2D201-102EN*B
250
3.6.6 Adjustment of gantry rotation speed by the servo amplifier

3.6.6.1 Adjusting the rotation speed

The rotation speed is monitored in the same manner as previously by connecting the
cable between the KGTSM PWB and the personal computer.

CAUTION: If the 2.0-MHU X-ray tube is installed in the system, do not perform
0.75-second rotation from the gantry maintenance panel.
Doing so may damage the X-ray tube.

<Adjustment procedure>

(1) Use the personal computer to check the rotation speed at 0.75 second.
(If the 2.0-MHU X-ray tube is installed in the system, check the rotation speed for
1.0-second rotation.)

(2) When the rotation speed setting is incorrect, rotate the variable resistor VR1 on the
KGTSM PWB and adjust the rotation speed.

KGTS PWB

(3) Repeat the speed adjustment in step (2) until it is within the specified range.

No. 2D201-102EN*B
251
3.6.7 Checking the rotation speed voltage sent from KGTSM PWB to the
servo speed amplifier
This subsection describes procedures to check the voltage value corresponding to the
rotation speed of the gantry. The voltage is sent from the KGTSM PWB to the servo
amplifier.

<Tools required>

(1) Personal computer

(2) Service cable (GR-1, as standard)

(3) Programs: TERM.COM and MTERM.BAT

(4) Digital tester

<Procedures to check the servo amplifier voltage>

(1) Turning OFF the power to the gantry (CP1 OFF)

(a) Turn OFF the circuit breaker CP320 for the servo amplifier.

(b) Unplug the servo cable connector from connector CN431 on the KGTSM
PWB.

(c) Set both bit 1 and bit 2 of DIP switch DSW10 on the KGTSM PWB to the ON
position. (Bits 1, 2, and 4 of DSW10 are ON.)

(2) Connect the personal computer to connector CN404 of the KGTSM PWB with the
service cable, and execute MTERM.

Disconnect this cable

CN431

RESET(SW21) CN404

DSW10
DSW4

DSW10

1 2 3 4

No. 2D201-102EN*B
252
(3) Turn ON the power to the gantry.

(4) When the KGTSM starts up, set bit 1 of DIP switch DSW4 OFF, and press the
RESET switch (SW21, white).
An asterisk "*" appears on the personal computer.

(5) Type the following (with lowercase characters) from the personal computer.
fb 934001 934001 03 [CR] ( : space
fb 938001 938001 F0 [CR] [CR] : Press the return key)

(6) Measure the voltage between test points TP41 (Servo Output) and TP40 (0 V) on
the KGTSM PWB and make sure that the voltage is -7.68 V ±76 mV.
If the voltage is not in the above range, adjust it with the control VR1.

(7) Press the RESET switch SW21 on the KGTSM PWB.

(8) Turn OFF the power to the gantry and make the initial setting on the KGTSM.
(This operation is always required.)

(a) Reconnect the servo cable to the connector CN431 on the KGTSM PWB.

(b) Set both bit 1 and bit 2 of DIP switch DSW10 on the KGTSM PWB to the OFF
position.

DSW10

1 2 3 4 1 2 3 4

(c) Set bit 1 of the DIP switch DSW4 ON.

DSW4

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

No. 2D201-102EN*B
253
3.6.8 Servo amplifier setting and verification
For details concerning the user constants, refer to table 3.6-2.

Panel indicator

Panel switches

Panel operator

Figure 3.6-2 Design of servo amplifier

No. 2D201-102EN*B
254
3.6.8.1 Servo amplifier setting and verification

The display mode of the panel operator is switched cyclically each time the MODE/SET
key on the panel switch is pressed as shown in figure 3.6-3 below.

Control power ON

Press the MODE/SET key.

Status display mode

Press the MODE/SET key.

Auxiliary function execution mode

Press the MODE/SET key.

Constant setting mode

Press the MODE/SET key.

Monitor mode

Press the MODE/SET key.

Figure 3.6-3 Display mode switching

No. 2D201-102EN*B
255
3.6.8.2 Preparation
<Preparation procedure>

(1) Turn OFF the breaker CP1 situated beneath the rear left of the gantry.

(2) Open the gantry front cover. Turn OFF breaker CP320.

(3) Open the gantry left side cover.

(4) Remove the servo unit metal cover.

(5) Turn ON the breaker CP1.

(6) Turn ON the servo amplifier breaker CP320.

(7) Leave the rotation enable SW320 set to the NORMAL (downward) position (the
rotation warning lamp remains off).

(8) Verify that the servo amplifier monitor panel shows the following display:

Control power ON Main circuit power ON

Servo chassis

MS320
Rotation lamp

SW320 SW326

Externally connected
NORMAL NORMAL
feedback resistor
(R320 to R322)
CP320
ON

OFF

Figure 3.6-4

No. 2D201-102EN*B
256
3.6.8.3 User constant check/change method
The user constant setting mode has two functions: the constant setting function and the
function selection function. The setting method differs depending on the function.

The constant setting function is used to change the constant data to be adjusted within
a certain range. The function selection function is used to select the function assigned
to each digit of the panel indicator (5-digit 7-segment LED).

Constant setting data check/change method

<Check/change procedures>

(1) Press the MODE/SET key twice.

Status display mode

Auxiliary function execution mode (When the MODE/SET key

is pressed once)

Constant setting mode (When the MODE/SET key is pressed

a second time)

(2) Use the DATA/ key to select the digit number and press the (UP) or
(DOWN) key as many times as required to select the user constant number to be
set.

For example, Pn100 is selected here.

User constant number

(3) When the DATA/ key is held down for more than 1 second, the current data of
the selected user constant is displayed.

: Displayed in 5-digit decimal notation

Here, the user constant for Pn100 is displayed as "00011".

(4) To change the constant, use the DATA/ key to move to the digit number to be
changed and press the or key to change it to the desired data.

Holding down the or key increases the display change speed.

(5) After change is completed, hold down the DATA/ key for more than 1 second.
The data blinks while it is being recorded.

No. 2D201-102EN*B
257
(6) Hold down the DATA/ key again for more than 1 second. The display returns to
user constant number display.

• To check user constants, repeat (2) → (3) → (6).

• To change user constants, repeat (2) → (3) → (4) → (5) → (6).

• The user constant list is shown in table 3.6-2. (The table also includes function
selection user constants.)
When confirming the setting values, verify that the settings are as shown in table
3.6-2.
Î Refer to table 3.6-2
"User constant list".

NOTE: After a user constant has been changed, the power of the servo amplifier must
be turned OFF and then ON again to make the setting effective. Turn the
servo amplifier breaker CP320 OFF and then ON again.

Function selection user constant data check/change method

<Check/change procedures>

(1) Press the MODE/SET key twice.

Status display mode

Auxiliary function execution mode (When the MODE/SET key

is pressed once)

Constant setting mode (When the MODE/SET key is pressed

a second time)

(2) Use the DATA/ key to select the digit number and press the (UP) or
(DOWN) key as many times as required to select the user constant number to be
set.

For example, Pn000 is selected here.

User constant number

(3) When the DATA/ key is held down for more than 1 second, the current data of
the selected function selection user constant is displayed.

Here, the user constant for Pn000 is displayed as "n.0001".

No. 2D201-102EN*B
258
(4) To change the constant, use the DATA/ key to move to the digit number to be
changed and press the or key to select the function setting value.

: Displayed in hexadecimal notation for each of

0 digits to 3 digits.
0 digits
1 digit
2 digits
3 digits

(5) After change is completed, hold down the DATA/ key for more than 1 second.
The data blinks while it is being recorded.

(6) Hold down the DATA/ key again for more than 1 second. The display returns to
user constant number display.

• To check function selection user constants, repeat (2) → (3) → (6).

• To change function selection user constants, repeat (2) → (3) → (4) → (5) → (6).

• The types of function selection user constants are shown in table 3.6-1.
When confirming the setting values, verify that the settings are as shown in table
3.6-1.
Î Refer to table 3.6-1 "Types of function
selection user constants".

NOTE: After a user constant has been changed, the power of the servo amplifier must
be turned OFF and then ON again to make the setting effective. Turn the
servo amplifier breaker CP320 OFF and then ON again.

No. 2D201-102EN*B
259
 Table 3.6-1 Types of function selection user constants

Type User Name Setting Details

constant
number
Function selection Pn000 Function selection basic 0001 Refer to table 3.6-3.
constant switch
Pn001 Function selection application 0002 Refer to table 3.6-3.
switch 1
Pn002 Function selection application 0100 Refer to table 3.6-3.
switch 2
Pn003 Function selection application 0010 Refer to table3.6-3.
switch 3
Servo gain-related Pn10B Gain related application 0004 Refer to table 3.6-3.
constants switch
Pn110 Online auto tuning related 0010 Refer to table 3.6-3.
switch
Position control- Pn200 Position control command 0000 Refer to table 3.6-3.
related constant type selection switch
Sequence-related Pn50A Input signal selection 1 8800 Refer to table 3.6-4.
constants
Pn50B Input signal selection 2 6548 Refer to table 3.6-4.
Pn50C Input signal selection 3 8888 Refer to table 3.6-4.
Pn50D Input signal selection 4 8888 Refer to table 3.6-4.
Pn50E Output signal selection 1 3211 Refer to table 3.6-5.
Pn50F Output signal selection 2 0000 Refer to table 3.6-5.
Pn510 Output signal selection 3 0000 Refer to table 3.6-5.

No. 2D201-102EN*B
260
 Table 3.6-2 User constant list (1/3)

User
Type Name Unit Lower limit Upper limit Setting
constant
Function Pn000 Function selection basic 0001
selection switch
constants
Pn001 Function selection 0002
application switch 1
Pn002 Function selection 0100
application switch 2
Pn003 Function selection 0010
application switch 3
Gain-related Pn100 Speed loop gain Hz 1 2000 11
constants
Pn101 Speed loop integral 0.01 ms 15 51200 11000
constant
Pn102 Position loop gain 1/s 1 2000 15
Pn103 Inertia ratio % 0 10000 3000
Pn104 Second speed loop gain Hz 1 2000 40
Pn105 Second speed loop 0.01 ms 15 51200 2000
integral constant
Pn106 Second position loop gain 1/s 1 2000 40
Pn107 Bias r/min 0 450 0
Pn108 Bias addition width Command 0 250 7
unit
Pn109 Feed forward % 0 100 0
Pn10A Feed forward filter 0.01 ms 0 6400 0
constant
Pn10B Gain-related application ⎯ ⎯ ⎯ 0004
switch
Pn10C Mode switch % 0 800 200
(torque command)
Pn10D Mode switch r/min 0 10000 0
(speed command)
Pn10E Mode switch 10r/min/s 0 3000 0
(acceleration)
Pn10F Mode switch Command 0 10000 0
(deviation pulse) unit
Pn110 Online auto tuning- ⎯ ⎯ ⎯ 0010
related switch
Pn111 Speed feedback % 1 100 100
correction
Pn112 Reserved constant % 0 1000 100
(must not be used)
Pn113 ⎯ 0 10000 1000
Pn114 ⎯ 0 400 200
Pn115 ⎯ 0 1000 32
Pn116 ⎯ 0 1000 16

No. 2D201-102EN*B
261
 Table 3.6-2 User constant list (2/3)

User
Type Name Unit Lower limit Upper limit Setting
constant
Gain-related Pn117 Reserved constant % 20 100 100
constants (must not be used)
Pn118 % 50 100 100
Position-related Pn200 Position control ⎯ ⎯ ⎯ 0000
constants command type selection
switch
Pn201 PG division ratio P/r 16 16384 675
Pn202 Electronics gear ratio ⎯ 1 65535 4
(numerator)
Pn203 Electronics gear ratio ⎯ 1 65535 1
(denominator)
Pn204 Position command 0.01 ms 0 6400 0
acceleration/deceleration
constant
Pn205 Multi-turn limit setting rev 0 65535 65535
Speed-related Pn300 Speed command input 0.01 150 3000 900
constants gain V/rated
speed
Pn301 Internal setting speed 1 r/min 0 10000 100
Pn302 Internal setting speed 2 r/min 0 10000 200
Pn303 Internal setting speed 3 r/min 0 10000 300
Pn304 Jog (JOG) speed r/min 0 10000 540
Pn305 Soft start acceleration ms 0 10000 4000
time
Pn306 Soft start deceleration ms 0 10000 4000
time
Pn307 Speed command filter 0.01 ms 0 65535 40
constant
Pn308 Speed F/B filter constant 0.01 ms 0 65535 0
Torque-related Pn400 Torque command input 0.1 10 100 30
constants gain V/rated
torque
Pn401 Torque command filter 0.01 ms 0 65535 1200
constant
Pn402 Normal rotation torque % 0 800 800
limit
Pn403 Reverse rotation torque % 0 800 800
limit
Pn404 Normal rotation side % 0 800 100
external torque limit
Pn405 Reverse rotation side % 0 800 100
external torque limit
Pn406 Emergency stop torque % 0 800 800
Pn407 Speed limit for torque r/min 0 10000 10000
control

No. 2D201-102EN*B
262
 Table 3.6-2 User constant list (3/3)

User
Type Name Unit Lower limit Upper limit Setting
constant
Sequence- Pn500 Positioning completion Command 0 250 7
related width unit
constants
Pn501 Zero clamp level r/min 0 10000 10
Pn502 Rotation detection level r/min 0 10000 20
Pn503 Speed matching signal r/min 0 100 10
detection width
Pn504 NEAR signal width Command 1 250 7
unit
Pn505 Overflow level 256 1 32767 1024
command
unit
Pn506 Brake command - servo 10 ms 0 50 0
OFF delay time
Pn507 Brake command output r/min 0 10000 100
speed level
Pn508 Servo OFF - brake 10 ms 10 100 50
command waiting time
Pn509 Momentary power failure ms 20 1000 100
holding time
Pn50A Input signal selection 1 ⎯ ⎯ ⎯ 8800
Pn50B Input signal selection 2 ⎯ ⎯ ⎯ 6548
Pn50C Input signal selection 3 ⎯ ⎯ ⎯ 8888
Pn50D Input signal selection 4 ⎯ ⎯ ⎯ 8888
Pn50E Output signal selection 1 ⎯ ⎯ ⎯ 3211
Pn50F Output signal selection 2 ⎯ ⎯ ⎯ 0000
Pn510 Output signal selection 3 ⎯ ⎯ ⎯ 0000
Other Pn600 Feedback resistor 10 W 0 10000 90
constants capacity
Pn601 Reserved constant ⎯ 0 10000 0
(must not be used)

No. 2D201-102EN*B
263
 Table 3.6-3 Function selection user constant switch list (1/4)

User Digit
Name Setting Contents Setting
constant No. position
Pn000 0 Rotation direction 0 Counterclockwise rotation is 1
selection considered the normal rotation
direction.
1 Clockwise rotation is considered
the normal rotation direction
(reverse rotation mode).
1 Control method selection 0 Speed control (analog command) 0
1 Position control (pulse string
command)
2 Torque control (analog command)
3 Internal setting speed control
(contact command)
4 Internal setting speed control Ù
Speed control (analog command)
5 Internal setting speed control Ù
Position control (pulse string
command)
6 Internal setting speed control Ù
Torque control (analog command)
7 Position control (pulse string
command) Ù Speed control
(analog command)
8 Position control (pulse string
command) Ù Torque control
(analog command)
9 Torque control (analog command)
Ù Speed control (analog
command)
A Speed control (analog command)
Ù Zero clamp
B Position control (pulse string
command) Ù Position control
(inhibited)
2 Shaft address 0 to F The servo pack shaft address is 0
set.
3 Spare 0 ⎯ 0

No. 2D201-102EN*B
264
 Table 3.6-3 Function selection user constant switch list (2/4)

User Digit Name Setting

Setting Contents
constant No. position
Pn001 0 Stop method in the case 0 Stops the motor using the dynamic 2
of servo OFF or alarm brake (DB).
generation
1 Stops the motor using the DB and
then releases the DB.
2 Sets the motor to free-running
status without using the DB.
1 Stop method in the case 0 Stops the motor using the DB or 0
of over-travel (OB) sets the motor to free-running
status (same as Pn001.0)
1 Sets the Pn406 setting torque to
the maximum value to slow down
and stop the motor and then sets
the motor to servo lock status.
2 Sets the Pn406 setting torque to
the maximum value to slow down
and stop the motor and then sets
the motor to free-running status.
2 AC/DC power input 0 Non-support of DC power input: AC 0
selection power is input from L1, L2, L3.
1 Support of DC power input: DC
power is input from (+) 1, (-).
3 Warning code output 0 AL01, AL02, and AL03 output only 0
selection an alarm code.
1 AL01, AL02, and AL03 output an
alarm code and a warning code.
Note that when a warning code is
output, the ALM signal output
status remains ON (normal).
Pn002 0 Speed control option 0 None 0
1 T-REF is used as the external
torque limit input.
2 T-REF is used as the torque feed
forward input.
1 Torque control option 0 None 0
1 V-REF is used as the external
speed limit input.
2 Absolute value encoder 0 The absolute value encoder is used 1
operation method as an absolute value encoder.
1 The absolute value encoder is used
as an incremental encoder.
2 The multi-turn limit is used in order
to use the absolute value encoder
as the absolute value encoder.
3 Spare 0 ⎯ 0

No. 2D201-102EN*B
265
 Table 3.6-3 Function selection user constant switch list (3/4)

User Digit
Name Setting Contents Setting
constant No. position
Pn003 0 Analog monitor 1 0 Motor rotation speed: 1 V/1000 0
rpm
1 Torque command 1 Speed command: 1 V/1000 rpm 1
monitor
2 Torque command: 1 V/1000 rpm
Analog monitor 1 3 Position deviation: 0.05 V/1
command unit
Speed command monitor 4 Position deviation: 0.05 V/100
command units
5 Command pulse frequency [rpm
conversion]: 1 V/1000 rpm
6 Motor rotation speed × 4: 1 V/250
rpm
7 Motor rotation speed × 8: 1 V/250
rpm
8 Reserved constant (must not be
used)
9 Reserved constant (must not be
used)
A Reserved constant (must not be
used)
B Reserved constant (must not be
used)
C Reserved constant (must not be
used)
D Reserved constant (must not be
used)
E Reserved constant (must not be
used)
F Reserved constant (must not be
used)
2 Spare 0 ⎯ 0
3 Spare 0 ⎯ 0
Pn10B 0 Mode switch selection 0 The internal torque command is 4
selected (level setting: Pn10C).
1 The speed command is selected
(level setting: Pn10D).
2 The acceleration is selected (level
setting: Pn10E).
3 The deviation pulse is selected
(level setting: Pn10F).
4 No mode switch function
1 Speed loop control 0 PI control 0
method
1 IP control
2 Spare 0 ⎯ 0
3 Spare 0 ⎯ 0

No. 2D201-102EN*B
266
 Table 3.6-3 Function selection user constant switch list (4/4)

User Digit
Name Setting Contents Setting
constant No. position
Pn110 0 Online auto tuning 0 Auto tuning is performed only 0
method during the early stage of operation.
1 Auto tuning is always performed.
2 Auto tuning is not performed.
1 Speed feedback 0 Selected 1
correction
function selection 1 Not selected
2 Viscous friction 0 Friction compensation: None 0
compensation function
1 Friction compensation: Small
selection
2 Friction compensation: Large
3 Reserved constant (must 0 ⎯ 0
not be used)
1 ⎯
Pn200 0 Command pulse form 0 Code + Pulse, positive logic 0
1 CW + CCW, positive logic
2 Phase A + Phase B (1×), positive
logic
3 Phase A + Phase B (2×), positive
logic
4 Phase A + Phase B (4×), positive
logic
5 Code + Pulse, negative logic
6 CW + CCW, negative logic
7 Phase A + Phase B (1×), negative
logic
8 Phase A + Phase B (2×), negative
logic
9 Phase A + Phase B (4×), negative
logic
1 Clear signal form 0 Clears the deviation counter at the 0
"H" level of the signal.
1 Clears the deviation counter at the
leading edge of the signal.
2 Clears the deviation counter at the
"L" level of the signal.
3 Clears the deviation counter at the
falling edge of the signal.
2 Clear operation 0 Clears the deviation counter at the 0
time of base block.
1 The deviation counter is not
cleared. (It can be cleared only by
the CLR signal.)
2 Clears the deviation counter in the
case of alarm generation.
3 Filter selection 0 Filter for line driver signal command 0
input
1 Filter for open collector signal
command input

No. 2D201-102EN*B
267
 Table 3.6-4 Function selection user constant input signal selection list (1/1)

User Digit
Name Setting Contents Setting
constant No. position
Pn50A 0 Input signal assignment 0 Sequence input signal assignment is 0
mode set to the same setting as that for the
SGDB-type servo pack.
1 Sequence input signal assignment
can be set freely.
1 /S-ON signal mapping 0 Input from the SI0 (CN1-40) input 0
(Servo ON at "L") terminal
1 Input from the SI1 (CN1-41) input
terminal
2 Input from the SI2 (CN1-42) input
terminal
3 Input from the SI3 (CN1-43) input
terminal
4 Input from the SI4 (CN1-44) input
terminal
5 Input from the SI5 (CN1-45) input
terminal
6 Input from the SI6 (CN1-46) input
terminal
7 Fixes the signal to "valid".
8 Fixes the signal to "invalid".
2 /P-CON signal mapping 0 to 8 Same as above 8
(P control at "L")
3 /P-OT signal mapping 0 to 8 Same as above 8
(Over-travel at "H")
Pn50B 0 N-OT signal mapping 0 to 8 Same as above 8
(Over-travel at "H")
1 /ALM-RST signal mapping 0 to 8 Same as above 4
(Alarm reset at "L")
2 /P-CL signal mapping 0 to 8 Same as above 5
(Torque control at "L")
3 /N-CL signal mapping 0 to 8 Same as above 6
(Torque control at "L")
Pn50C 0 /SPD-D signal mapping 0 to 8 Same as above 8
(Internal setting speed
selection)
1 /SPD-A signal mapping 0 to 8 Same as above 8
(Internal setting speed
selection)
2 /SPD-B signal mapping 0 to 8 Same as above 8
(Internal setting speed
selection)
3 /C-CEL signal mapping 0 to 8 Same as above 8
(Control mode switching)
Pn50D 0 /ZCLAMP signal mapping 0 to 8 Same as above 8
(Zero clamp)
1 /INHIBIT signal mapping 0 to 8 Same as above 8
(Command pulse blocking)
2 /G-CEL signal mapping 0 to 8 Same as above 8
(Gain switching)
3 (Reservation) 0 to 8 Same as above 8

No. 2D201-102EN*B
268
 Table 3.6-5 Function selection user constant output signal selection list (1/1)

User Digit
Name Setting Contents Setting
constant No. position
Pn50E 0 /COIN signal mapping 0 Not used 1
1 Output from S01 (CN1-25, 26) output
terminal
2 Output from S02 (CN1-27, 28) output
terminal
3 Output from S03 (CN1-29, 30) output
terminal
1 /V-CMP signal mapping 0 to 3 Same as above 1
2 /TGON signal mapping 0 to 3 Same as above 2
3 /S-RDY signal mapping 0 to 3 Same as above 3
Pn50F 0 /CLT signal mapping 0 to 3 Same as above 0
1 /VLT signal mapping 0 to 3 Same as above 0
2 /BK signal mapping 0 to 3 Same as above 0
3 /WARN signal mapping 0 to 3 Same as above 0
Pn510 0 /NEAR signal mapping 0 to 3 Same as above 0
1 Spare 0 ⎯ 0
2 Spare 0 ⎯ 0
3 Spare 0 ⎯ 0

No. 2D201-102EN*B
269
3.6.8.4 Servo pack error check method

Alarm trace back mode

• In alarm trace back mode, up to the last 10 iterations of alarm information

(abnormality information) can be displayed.

• Alarm trace back data is not deleted even after the servo pack is turned OFF.

Alarm contents
Alarm occurrence number
A higher alarm occurrence number (0 to 9) indicates older
alarm data (abnormality information).

Display method using the panel operator

<Display method>

(1) Press the MODE/SET key on the panel operator once.

Status display mode

Auxiliary function execution mode (when MODE/SET key is

pressed once)

This display "Fn000" indicates alarm trace back data display mode.

(2) Hold down the DATA/ key for more than 1 second. The alarm trace back data
is displayed.

(3) Press the (UP) or (DOWN) key to count up or down the alarm occurrence
number. The past alarm information is displayed.

• If no abnormality has occurred (if no abnormality information exists), the display

on the panel indicator is as shown below.

(4) Hold down the DATA/ key again for more than 1 second. The mode returns to
alarm trace back data display mode.

• For alarm contents, refer to table 3.6-6 "Servo pack alarm display list".

No. 2D201-102EN*B
270
 Table 3.6-6 Servo pack alarm display list (1/2)

Alarm
ALM output Alarm name Contents of alarm
display
A.02 X Parameter breakdown Servo pack EEPROM data is abnormal.
A.03 X Abnormal main circuit detector unit Each detection data in the power circuit is
abnormal.
A.04 X Parameter setting error A user constant value outside the permissible
setting range is set.
A.05 X Combination error The combination capacity of the motor and the
servo pack is not correct.
A.10 X Overcurrent or heat sink overheating A heating current flowed in the IGBT, or the heat
sink of the servo pack overheated.
A.30 X Feedback abnormality Disconnection of the feedback resistor, feedback
transistor malfunction
A.32 X Feedback overload The feedback level exceeds the capacity of the
feedback resistor.
A.40 X Overvoltage*2 The main circuit DC voltage is excessively high.

A.41 X Insufficient voltage*2 The main circuit DC voltage is low.

A.51 X Acceleration The rotational speed of the motor is excessively

high.
A.71 X Overload (momentary maximum load) Operation was performed for several seconds to
several tens of seconds with a torque significantly
higher than the rating.
A.72 X Overload (continuous maximum load) Operation was performed continuously with a
torque exceeding the rating.
A.73 X DB overload In DB (dynamic brake) overload operation, the
rotation energy exceeds the DB resistor capacity.
A.74 X Inrush current regulation resistor Power ON/OFF operation of the main circuit was
overload repeated frequently.
A.7A X Heat sink heating*3 The heat sink of the servo pack overheated.

A.81 X Encoder backup error All the power supplies of the encoder were low
and the position data was cleared.
A.82 X Encoder 'Sumcheck' error The 'Sumcheck' result of the encoder memory is
abnormal.
A.83 X Abnormal encoder battery*4 The voltage of the absolute value encoder
backup battery fell.
A.84 X Encoder absolute error The received absolute value data is abnormal.
A.85 X Encoder over-speed The encoder was rotating in high speed when the
power was turned ON.
A.86 X Encoder overheat The temperature inside the encoder is
excessively high.
A.b1 X Speed command A/D error The speed command input A/D converter is
abnormal.
A.b2 X Torque command A/D error The torque command input A/D converter is
abnormal.
A.C1 X Runout prevention signal detection The servo motor has run out.
A.C8 X Encoder clear error The number of multiple turns of the absolute
Multi-turn limit setting error value encoder could not be cleared or set
correctly.
A.C9 X Encoder communication error Communication cannot be performed between
the encoder and the servo pack.
A.CA X Encoder parameter error The encoder parameter is abnormal.

No. 2D201-102EN*B
271
 Table 3.6-6 Servo pack alarm display list (2/2)

Alarm
ALM output Alarm name Contents of alarm
display
A.Cb X Encoder echo back error The contents of communication with the encoder
are incorrect.
A.d0 X Excessive positional deviation The position deviation pulse exceeds the user
constant (Pn505) setting value.
A.F1 X Power line missing phase Of the three phases of the mains power supply, a
phase is not connected.
CPF00 Undefined Digital operator communication Communication cannot be performed between
error*5 the digital operator and the servo pack.

CPF01

A.-- { Normal operating status Normal operating status

*1: ALM output {: "L" signal, ×: "H" signal. For ×, MC320 is OFF.
*2: This is not applicable because an AC power supply is used.
*3 Displayed only for 30 W to 1 kW. This does not apply to the servo pack of the Asteion
because its power consumption is 2 kW.
*4: This is not applicable because this is a 17-bit incremental encoder.
*5: This is not applicable because the panel operator is used, not the digital operator.

No. 2D201-102EN*B
272
3.7 Adjustment Checks
3.7.1 Movement range setting method for couch autoslide
The method for setting the movement range for couch autoslide on the KGTSM is
described here. Once the distances are set on the KGTSM, they will be maintained by
the KGTSM until rewritten.

NOTE: Even for units without the autoslide function, the movement range should be
set at 310 mm.

<Tools required>

• Personal computer

• Cables for servicing (standard GR-1)

• Programs: TERM.COM, MTERM.BAT

<Setting procedure>

1) Keep the power of the gantry OFF.

2) Connect CN404 of the KGTSM to the COM port of the personal computer using the
service cable.

3) Start MTERM on the personal computer.

4) Turn ON the power of the gantry and start the KGTSM.

(The seven segment LEDs will change from 00 → 88.)

• At the personal computer:

KGTSM boot V2.00

:
[GTS]

5) Set the autoslide values using the following procedure:

a) Press [Enter].

b) Input: auto [Enter]

autoslide move value:

c) Input a desired autoslide value:

If 310 mm 310 [Enter]

If 310.5 mm 310.5 [Enter]

d) The input value will be displayed:

autoslide move value XXX.X mm

are you sure? y/n:
To confirm the set value y [Enter]
To change the set value n [Enter] ........ Operation is returned to step c).

No. 2D201-102EN*B
273
 e) When the setting is confirmed, the following display will appear:

*** H command preset data ***

autoslide = XXXX
0 clear time = YYYY

XXXX: Indicates the couch autoslide distance.

(Indicator value x set value by 0.5 mm)

3.7.2 Setting the zero-clear time for couch sliding

It is necessary to keep the zero-clear switch pressed for a period of time to execute
zero-clear for couch sliding. The procedure for setting this time period is outlined below.

<Tools required>

• Personal computer

• Cables for service (standard GR-1)

• Programs: TERM.COM, MTERM.BAT

<Setting procedure>

1) Keep the gantry power OFF.

2) Connect CN404 of the KGTSM to the COM port of the personal computer using the
service cable.

3) Start MTERM on the personal computer.

4) Turn ON the power of the gantry and start the KGTSM.

(The seven segment LEDs will change from 00 → 88.)

• At the personal computer:

KGTSM boot V2.00

:
[GTS]

5) Set the zero-clear time in the following manner:

a) Press [Enter].

b) Type: ctm [Enter]

0 clear time value:

c) Type the zero-clear time:

If 2 seconds 20 [Enter]
If 2.5 seconds 25 [Enter]

No. 2D201-102EN*B
274
 d) The typed value will be displayed:

0 clear time X.X (sec)

are you sure? y/n:
To confirm the typed value y [Enter]
To change the typed value n [Enter] ......... The operation will return to step c).

e) When the setting is confirmed, the following display will appear:

*** H command preset data ***

autoslide = XXXX
0 clear time = YYYY

YYYY: Indicates the 0-clear time (the value that was set above).

3.7.3 Procedure for setting the couch horizontal movement absolute

value control data
The procedure for setting the distance between the couch slide sensors in the KGTSM
is described below. Once the value has been set for this item, the KGTSM retains the
value until it is changed.

<Tools required>

1) PC

2) Cable for service use (standard GR-1)

3) Hyper Terminal, etc.

<Setting procedure>

1) Turn OFF the power of the gantry.

2) Connect the cable for service use between CN404 of the KGTSM and the PC.

3) Start up Hyper Terminal from the PC.

4) Turn the gantry power ON and start up the KGTSM (the display on the 7-segment
LED changes from 00 to 88).

• The following is displayed on the PC screen.

KGTSM boot V2.00

:
[GTS]

No. 2D201-102EN*B
275
5) Follow the steps below to set the absolute value control data.

a) Press [Enter].

b) Enter slide [Enter].

1 -- CBTB-014A/CBTB-015A:
(IN Limit - IN-1: 50 mm, IN-1 - OUT2: 1463 mm,
OUT2 - OUT1: 237 mm, OUT1 - OUT Limit: 68 mm)

2 -- CBTB-016A/CBTB-018A:
(IN Limit - IN-1: 50 mm, IN-1 - OUT2: 1984 mm,
OUT2 - OUT1: 88 mm, OUT1 - OUT Limit: 68 mm)

3 -- CBTB-016B/CBTB-018B:
(IN Limit - IN-1: 50 mm, IN-1 - OUT2: 1684 mm,
OUT2 - OUT1: 88 mm, OUT1 - OUT Limit: 68 mm)

4 -- Selfpropelled:
(IN Limit - IN-1: 59 mm, IN-1 - OUT2: 1734 mm,
OUT2 - OUT1: 59 mm, OUT1 - OUT Limit: 68 mm)

5 -- Other type

Couch type select: (2)?

c) Enter the desired number.

To set data 1 : 1 [Enter]

To set data 2 : 2 [Enter]
To set data 3 : 3 [Enter]
To set data 4 : 4 [Enter]
To set data other than 1 to 4 : 5 [Enter]

d) The display differs depending on the number that was entered in step c).

If 1 is entered:

IN Limit - IN-1: 50.0 mm, IN-1 - OUT2: 1463.0 mm,

OUT2 - OUT1: 237.0 mm, OUT1 - OUT Limit: 68.0 mm
are you sure ? y/n:

To accept this data : y [Enter]

To reject this data : n [Enter] ........ The display returns to c).

If 2 is entered:

IN Limit - IN-1: 50.0 mm, IN-1 - OUT2: 1984.0 mm,

OUT2 - OUT1: 88.0 mm, OUT1 - OUT Limit: 68.0 mm
are you sure ? y/n:

To accept this data : y [Enter]

To reject this data : n [Enter] ........ The display returns to c).

If 3 is entered:

IN Limit - IN-1: 50.0 mm, IN-1 - OUT2: 1684.0 mm,

OUT2 - OUT1: 88.0 mm, OUT1 - OUT Limit: 68.0 mm
are you sure ? y/n:

No. 2D201-102EN*B
276
 To accept this data : y [Enter]
To reject this data : n [Enter] ........ The display returns to c).

If 4 is entered:

IN Limit - IN-1: 59.0 mm, IN-1 - OUT2: 1734.0 mm,

OUT2 - OUT1: 59.0 mm, OUT1 - OUT Limit: 68.0 mm
are you sure ? y/n:

To accept this data : y [Enter]

To reject this data : n [Enter] ........ The display returns to c).

If 5 is entered:

IN Limit - IN-1: (ZZZZ)?

(i) Enter the data for the distance between IN Limit and IN-1.

For 50 mm : 500 [Enter]

For 50.5 mm : 505 [Enter]
IN-1 - OUT2: (ZZZZ)?

(ii) Enter the data for the distance between IN-1 and OUT2.

For 1463 mm : 14630 [Enter]

For 1463.5 mm : 14635 [Enter]

(iii) Enter the data for the distance between OUT2 and OUT1.

For 237 mm : 2370 [Enter]

For 237.5 mm : 2375 [Enter]

(iv) Enter the data for the distance between OUT1 and OUT Limit.

For 68 mm : 680 [Enter]

For 68.5 mm : 685 [Enter]

IN Limit - IN-1: ZZ.Z mm, IN-1 - OUT2: ZZZZ.Z mm,

OUT2 - OUT1: ZZ.Z mm, OUT1 - OUT Limit: ZZ.Z mm
are you sure ? y/n:

To accept the above data : y [Enter]

To reject the above data : n [Enter] ........ The display returns to c).

e) The following is displayed.

*** H command preset data ***

auto slide = XXXX
0 clear time = YYYY
IN Limit - IN-1 = ZZ.Z mm, IN-1 - OUT2 = ZZZZ.Z mm
OUT2 - OUT1 = ZZ.Z mm, OUT1 - OUT Limit = ZZ.Z mm
:

ZZZZ: Indicates the absolute control data (the displayed value is the entered
setting)

No. 2D201-102EN*B
277
3.7.4 Couch-top sliding fine adjustment function setting procedure
The procedure for setting the couch-top sliding fine adjustment to ON or OFF is
described below. Once the value has been set for this item, the KGTSM retains the
value until it is changed.

<Tools required>

1) PC

2) Cable for service use (standard GR-1)

3) Hyper Terminal, etc.

<Setting procedure>

1) Turn OFF the power of the gantry.

2) Connect the cable for service use between CN404 of the KGTSM and the PC.

3) Start up Hyper Terminal from the PC.

4) Turn the gantry power ON and start up the KGTSM (the display on the 7-segment
LED changes from 00 to 88).

• The following is displayed on the PC screen.

KGTSM boot V2.00

:
[GTS]

5) Follow the steps below to perform setting.

a) Press [Enter]

b) Enter adj [Enter].

1 -- OFF 2 -- ON
Couch adjustment: (1)?

c) Enter the desired number.

To set the fine adjustment function to OFF : 1 [Enter]

To set the fine adjustment function to ON : 2 [Enter]

d) The following is displayed.

*** H command preset data ***

auto slide = XXXX
0 clear time = YYYY
IN Limit - IN-1 = ZZ.Z mm, IN-1 - OUT2 = ZZZZ.Z mm
OUT2 - OUT1 = ZZ.Z mm, OUT1 - OUT Limit = ZZ.Z mm
Couch adjustment = on or off
:

on or off: Indicates whether the fine adjustment function is enabled (on) or

disabled (off).

No. 2D201-102EN*B
278
3.7.5 Footswitch mode selection procedure
The procedure for selecting the couch footswitch mode is described below. Once the
value has been set for this item, the KGTSM retains the value until it is changed.

Note that the couch footswitch mode cannot be selected with Asteion VP. Be sure to
set the footswitch mode to UP/DOWN.

<Tools required>

1) PC

2) Cable for service use (standard GR-1)

3) Hyper Terminal, etc.

<Setting procedure>

1) Turn OFF the power of the gantry.

2) Connect the cable for service use between CN404 of the KGTSM and the PC.

3) Start up Hyper Terminal from the PC.

4) Turn the gantry power ON and start up the KGTSM (the display on the 7-segment
LED changes from 00 to 88).

• The following is displayed on the PC screen.

KGTSM boot V2.00

:
[GTS]

5) Follow the steps below to perform setting.

a) Press [Enter].

b) Enter fsw [Enter].

1 -- UP/DOWN 2 -- AUTO-SET/AUTO-HOME
preset foot sw mode: (1)?

c) Enter the desired number.

To set the footswitch mode to UP/DOWN : 1 [Enter]

To set the footswitch mode to AUTO-SET/AUTO-HOME : 2 [Enter]

d) The following is displayed.

*** H command preset data ***

auto slide = XXXX
0 clear time = YYYY
IN Limit - IN-1 = ZZ.Z mm, IN-1 - OUT2 = ZZZZ.Z mm
OUT2 - OUT1 = ZZ.Z mm, OUT1 - OUT Limit = ZZ.Z mm
Couch adjustment = on or off
Foot sw = up/down or auto-set/auto-home
:

up/down or auto-set/auto-home: Indicates the footswitch mode.

No. 2D201-102EN*B
279
3.7.6 Adjustment of couch height displays
This subsection describes procedures to adjust the couch height data displayed on the
operator panel.

<Tools required>

• Screwdriver for adjustment

<Procedures to adjust the couch height data display>

1) Set bit 4 of DIP switch DSW4 on the KGTSM PWB to the ON position.

2) Move down the couch top to the HEIGHT-1 position.

Move the couch top 80 mm or more from the OUT LIMIT position (at the IN position).
The couch top stops at the HEIGHT-1 position.

3) Turn the control VR6 on the KGTSM PWB so that the display of couch height data
displays 0.

4) Move up the couch top to the UP LIMIT position.

5) Turn the control VR7 on the KGTSM PWB so that the display of couch height data
displays +182.

6) Set bit 4 of DIP switch DSW4 on the KGTSM PWB to the OFF position.

CAUTION: After adjustment is completed, be sure to return DSW4-4 to the OFF

setting.

No. 2D201-102EN*B
280
3.7.7 Checking the couch top speed
<Tools required>

• Measuring tape

• Stopwatch

• Persons required for work: 2

<Work procedure>

(1) Attach the measuring tape to the couch. Use tape to attach a cable tie to the
couch top as a measurement marker.

Attach a cable tie so that the scale of the

measuring tape can be used for measurement.

Measuring tape

* The couch top is moved farther inward than the OUT-2 sensor.
Be careful when attaching the cable tie and the measuring tape.

(2) Perform operation at 10 mm/s or 100 mm/s from the operating panel.

Speed Amount of movement Measurement Limit

10 mm/s 340 mm (OUT) 300 mm 30 ± 0.5 s
340 mm (IN) 300 mm 30 ± 0.5 s
100 mm/s 600 mm (OUT) 400 mm 4 ± 0.5 s
600 mm (IN) 400 mm 4 ± 0.5 s

10 mm/s : Couch top speed when or is pressed

100 mm/s : Couch top speed when and are pressed together or
and are pressed together.

No. 2D201-102EN*B
281
3.8 Miscellaneous
3.8.1 Checks and adjustments after parts replacement (KGTSM and
rotation servo amplifier)
When the KGTSM PWB, the servo amplifier, and/or the servo motor are replaced, the
following checks and adjustments are required:

(1) KGTSM PWB

(a) Supply voltage check (5 V and ±15 V)

(b) Setting the amount of automatic couch slide (initially 310 mm) and 0-clear time

(c) Adjustment of couch height display (Fine adjustment)

3.8.2 Explanation of the system setting switches

3.8.2.1 DIP switch DSW4 on the KGTSM PWB

SW 1 SW 2 SW 3 SW 4 SW 5 SW 6 SW 7 SW 8
ON
(Normal setting)
OFF

SW1 : ON = KGTSM mode

OFF = Test mode
SW2 : Not in use
SW3 : Not in use
SW4 : For couch height/tilt/projector adjustment (Usually OFF)
SW5 : For software test (Usually OFF)
SW6 : Not in use
SW7 : Not in use
SW8 : Not in use

(1) SW1 (KGTSM S mode/Test mode)

This switch should be set to ON when the system is used normally.

(2) SW4 (for couch height/tilt/projector adjustment)

ON : Displays the current couch height/tilt/projector angle value on the operator

panel. (This setting is used for display and adjustment.)

OFF : Displays data only when couch height, tilting and the projector are in
motion.

(3) SW5 (for software test)

Usually set to OFF

No. 2D201-102EN*B
282
3.8.2.2 KGTSM PWB DIP switch DSW11 setting
(1) For 1.0-s rotation systems

SW 1 SW 2 SW 3 SW4 SW5 SW6 SW 7 SW 8

ON
OFF

System settings (SW5, SW6, SW7, and SW8)

SW5 SW6 SW7 SW8

OFF OFF OFF ON

(2) For 0.75-s rotation systems

SW 1 SW 2 SW 3 SW4 SW5 SW6 SW 7 SW 8

ON
OFF

System settings (SW5, SW6, SW7, and SW8)

SW5 SW6 SW7 SW8

OFF OFF ON ON

3.8.3 Gantry X-ray tube position information

The following X-ray tube position information is available:

(1) Gantry encoder data for rotation control

(a) The data can be seen under "X-ray-pos" in KGTSM status.

(b) Slowdown and stop position of the gantry are controlled.

(c) The data is incremented for each gantry encoder pulse.

........... 10,800 pulses per rotation

(2) Position information for 0.75-second rotation reconstruction

(a) The data can be seen on DCA 1 ch (0.75-s scan).

(b) The data shows the position of the X-ray tube for projection when scanning is
performed with 0.75-second rotation.

(c) The data increments by 1 for every 12 pulses of the gantry encoder.

........... 900 views per rotation

CAUTION: If the 2.0-MHU X-ray tube is installed in the system, do not perform
0.75-second rotation from the gantry maintenance panel.
Doing so may damage the X-ray tube.

No. 2D201-102EN*B
283
(3) Position information for 1.0-second rotation reconstruction

(a) The data can be seen on DCA 1 ch (1.0-s scan).

(b) The data shows the position of the X-ray tube for projection when scanning is
performed with 1.0-second rotation.

(c) The data increments by 1 for every 9 pulses of the gantry encoder.

........... 1,200 views per rotation

(4) Position information for 1.5-second rotation reconstruction

(a) The data can be seen on DCA 1 ch (1.5-s scan).

(b) The data shows the position of the X-ray tube for projection when scanning is
performed with 1-second rotation.

(c) The data increments by 1 for every 9 pulses of the gantry encoder.

........... 1,200 views per rotation

In the Asteion, the above data is cleared (set to zero) when the tube position
is 120°.

0° A position pulse sensor is provided to detect

when the tube position is 120°. When this
sensor is triggered, the data is cleared.

120° Therefore, these data count up again after

being 0-cleared at the tube position of 120
degrees.

Data is cleared to 0
at this tube position

No. 2D201-102EN*B
284
 TUBE-TOP [0°] The position pulse sensor is triggered
Gantry encoder : 7200 = 1C20 (H) when the X-ray tube is at 120 degrees.
0.75-second reconstruction : 600 = 258 (H) Gantry encoder pulse : 10800 PLS per rotation
1.0-second reconstruction : 800 = 320 (H) 0.75-second reconstruction : 900 views per rotation
1.5-second reconstruction : 800 = 320 (H) 1.0-second reconstruction : 1200 views per rotation
HOME 1.5-second reconstruction : 1200 views per rotation
POSITION

HOME-POS [345°, -15°] 0°

Gantry encoder : 6750 = 1A5E (H)
0.75-second reconstruction : 562 = 252 (H)
1.0-second reconstruction : 750 = 2EE (H)
1.5-second reconstruction : 750 = 2EE (H) 15°

TUBE-L-SIDE [270°] TUBE-R-SIDE [90°]

Gantry encoder : 4500 = 1194 (H) Gantry encoder : 9900 = 26AC (H)
No. 2D201-102EN*B

0.75-second reconstruction : 375 = 177 (H) 120° 0.75-second reconstruction : 825 = 339 (H)
1.0-second reconstruction : 500 = 1F4 (H) 1.0-second reconstruction : 1100 = 44C (H)
1.5-second reconstruction : 500 = 1F4 (H) 270° 90° 1.5-second reconstruction : 1100 = 44C (H)
285

LAST DATA
Gantry encoder : 10799 = 2A2F (H)
0.75-second reconstruction : 899 = 383 (H)
POSITION 1.0-second reconstruction : 1199 = 4AF (H)
PULSE 1.5-second reconstruction : 1199 = 4AF (H)
180°

TUBE-BOTTOM [180°] START DATA [120°]

Gantry encoder : 1800 = 708 (H) Gantry encoder : 0 = 0 (H)
0.75-second reconstruction : 150 = 96 (H) 0.75-second reconstruction : 0 = 0 (H)
1.0-second reconstruction : 200 = C8 (H) 1.0-second reconstruction : 0 = 0 (H)
1.5-second reconstruction : 200 = C8 (H) 1.5-second reconstruction : 0 = 0 (H)

Figure 3.8-1 Gantry position data

3.8.4 Optical system operation

3.8.4.1 Wedge operation

(1) Operation

(a) The wedge always returns to the reference position before it moves to the
specified position.

(b) The wedge does not move if the current position and the specified position are
the same.

(c) If the sensor position is at the reference position when the power is turned ON,
the wedge moves outside the sensor area once and then returns to the sensor
reference position before it moves to the target position.

(2) Timeout error

In the following cases, a timeout error occurs.

(a) The wedge does not pass the reference position sensor within the specified
time (3 s).

(b) When the specified position is the reference position, the wedge does not
pass the reference position sensor before its movement is completed.

(c) When the specified position is other than the reference position, the wedge
passes the reference position sensor before its movement is completed.

3.8.4.2 Slit operation

(1) Operation

(a) The slit always returns to the reference position before it moves to the
specified position.

(b) The slit does not move if the current position and the specified position are the
same.

(c) If the sensor position is at the reference position when the power is turned
ON, the slit moves outside the sensor area once and then returns to the
sensor reference position before it moves to the target position.

(2) Timeout error

In the following cases, a timeout error occurs.

(a) The slit does not pass the reference position sensor within the specified time
(3 s).

(b) When the specified position is the reference position, the slit does not pass
the reference position sensor before its movement is completed.

(c) When the specified position is other than the reference position, the slit
passes the reference position sensor before its movement is completed.

No. 2D201-102EN*B
286
3.8.4.3 Beam trimmer operation
(1) Operation

(a) The beam trimmer always returns to the reference position before it moves to
the specified position.

(b) The beam trimmer does not move if the current position and the specified
position are the same.

(c) If the sensor position is at the reference position when the power is turned
ON, the beam trimmer moves outside the sensor area once and then returns
to the sensor reference position before it moves to the target position.

(2) Timeout error

In the following cases, a timeout error occurs.

(a) The beam trimmer does not pass the reference position sensor within the
specified time (9 s).

(b) When the specified position is the reference position, the beam trimmer does
not pass the reference position sensor before its movement is completed.

(c) When the specified position is other than the reference position, the beam
trimmer passes the reference position sensor before its movement is
completed.

No. 2D201-102EN*B
287
3.8.5 Couch slide servo amplifier

3.8.5.1 Flow of corrective measures against a servo error during sliding

A servo error occurred

during sliding.

Check the description The previous examples of errors

of the error. can be referred to as required.
Refer to subsection
3.8.5.4 "Alarm code
list".

* The indicator blinks if an error is occurring

in the servo driver.

According to the Perform resetting as required.

contents of the error,
check whether the
parameter value is set
as the list specifies.
Refer to subsection 3.8.5.5
"Parameter list".

Write the set data on the

EEPROM to record it.

Reset the power

supply.

Check whether an
error occurs.

No. 2D201-102EN*B
288
3.8.5.2 Action to be taken when a slide servo error occurs
Identify the error by checking the blinking interval of the LEDs on the applicable alarm
panel. Alternatively, connect a PC to the slide servo amplifier to check the contents of
the alarm.

Method for identifying the contents of the generated alarm

• Checking the LED on the slide servo amplifier

Two LEDs are provided on the slide servo amplifier.

STATUS : When the green lamp lights : Normal

When the orange lamp blinks : Warning status (overload,
feedback overload)
When the red lamp lights : Occurrence of an alarm

ALARM CODE : Blinks when an alarm occurs

Orange: Tens place Red: Ones place

(Example: When the overload error (alarm 16) occurs)

The orange lamp blinks once and the red lamp blinks six times.

1s 0.5 s 0.5 s 0.5 s 0.5 s 0.5 s

Orange Red Red Red Red Red Red

After 2 s
1s 0.5 s 0.5 s 0.5 s 0.5 s 0.5 s 0.5 s

• Connecting a PC to the slide servo amplifier

To perform maintenance work by connecting a PC to the slide servo amplifier, the

maintenance tool (dedicated software and communication cable) provided with every
system is required.

No. 2D201-102EN*B
289
3.8.5.3 Maintenance tool operating procedure
(1) The maintenance tool includes the following software (FD) and the communication
cable.

To use the maintenance tool, install the software in the PC and connect the
communication cable between the PC and the servo amplifier.

Software : CBTB-016A V1.01-R000 (Toshiba's dedicated

PANATERM)
6 FDs (1/6, 2/6, and 3/6: English version, 4/6, 5/6, and
6/6: Japanese version)

Communication cable : 1

(2) What can be done with the maintenance tool

(a) Checking the currently generated alarm

(b) Checking previously generated alarms

(c) Checking parameters written in the amplifier

(d) Overwriting parameters written in the amplifier (if required)

(e) Saving parameters written in the amplifier to the PC

(f) Checking the status (checking whether or not the servo ON signal has been
recognized)

(g) Checking the number of instruction pulses from the KGTSM and the number
of feedback pulses from the motor encoder

No. 2D201-102EN*B
290
(3) Maintenance software installation procedure

Install the maintenance software on the hard disk of the personal computer using
the three setup floppy disks. Installation on a network drive is not possible.
Installation or setup by any other method, such as by using the copy function, is
also not possible. In addition, the maintenance software cannot be started from a
floppy disk.

Select the Japanese version or English version as appropriate for the site.

CBTB-016A V1.01-R000 1/6: English version setup disk 1

2/6: English version setup disk 2
3/6: English version setup disk 3
4/6: Japanese version setup disk 1
5/6: Japanese version setup disk 2
6/6: Japanese version setup disk 3

SETUP

Install PANATERM on the hard disk of the personal computer using the three setup
disks. PANATERM cannot be installed on a network drive. It cannot be installed
or setup by any other method, such as by using the copy function. It also cannot
be started from a floppy disk.

(a) Turn ON the power to the personal computer, and start the computer. (If any
software has been started, terminate it.)

(b) Insert setup disk 1 into the floppy disk drive.

(c) Double-click the setup program on the floppy disk.

• For Windows 2000 or earlier

Double-click "setup.exe".

• For Windows XP

Double-click "SetupXP.exe".

(d) The setup program will start.

(e) To start the setup procedure, click "OK".

(f) Execute operation according to the instructions given by the setup program.
During the procedure, you will be asked to replace the setup disk. Follow the
instructions.

(g) Click "Start installing" to start the installation of PANATERM. If "Exit Setup" is
clicked PANATERM will not be installed. If necessary, click "Change
directory" and specify the directory and the drive in which PANATERM should
be installed. (If they are not specified, PANATERM will be installed in the
"C:/Program Files/PANATERM" directory.)

(h) When the message "Setup completed" appears, click "OK" to complete the
setup procedure.

(i) Close all applications and restart Windows. (If Windows is not restarted,
PANATERM may not be added to the program menu.)

No. 2D201-102EN*B
291
(4) Maintenance tool startup procedure

(a) Connect the communication cable between the servo amplifier and the PC.

(b) Start the PANATERM software from the startup menu.

(c) When the following window is displayed, select "Communicate with the
amplifier" and click [OK].

(d) Select the series and click [OK].

Select "MUDS".

No. 2D201-102EN*B
292
(e) Select the system model and click [OK]. (Only one model name is displayed.)

(f) The COM port is detected.

No. 2D201-102EN*B
293
(g) When the following window is displayed, startup has been completed
normally.

The menu items used by this maintenance tool are Parameter, Monitor, and
Alarm, as shown below.

No. 2D201-102EN*B
294
(5) Parameter menu

This menu can be used to check the parameters in the servo amplifier. If the
parameter settings are incorrect, this menu can also be used to overwrite them.

Click this.

(a) To check parameters, select "Read-out from the amplifier" and click [OK].

No. 2D201-102EN*B
295
(b) The following window is displayed.

Slide the scroll bar to check all the parameter settings.

No. 2D201-102EN*B
296
(c) Details of the parameter setting window

• Read : Reads data from the file (.prm) in the local folder.
• Save : Saves the parameters as a file in the folder of the PC.
• Cmnt : Comments can be added when parameters are saved.
• Rcv : Reads parameters from the servo amplifier.
• Trans : Transmits the parameters displayed on the screen to the servo
amplifier.
• Print : Prints parameters.
• Exit : Closes the parameter setting window.
• EEP : Writes parameters onto the EEPROM of the servo amplifier.

• To change the parameters displayed in the window, select the parameter to

be changed and enter the setting value. To accept the entered value, press
the [ENTER] key or click the [Change of the setting value] button in the
window.
After the accepted parameters are sent to the servo amplifier by clicking the
[Trans] button, they must be written onto the EEPROM of the servo amplifier
by clicking the [EEP] button.

NOTE: 1. After the parameters are sent to the servo amplifier, if the power
is turned OFF without writing them onto the EEPROM, the new
settings become invalid and the previous settings remain valid.

2. After writing the parameters onto the EEPROM, be sure to turn

the power OFF and then ON again. Some of the parameters
require rebooting to make the new settings available.

No. 2D201-102EN*B
297
(d) Additional information regarding the parameter setting window

If the box in the Extract column is checked for a parameter in the previous
window, the parameter can be extracted to the sheet circled in the figure
below (up to 16 items).

*: For the parameter setting values, refer to the parameter list.

No. 2D201-102EN*B
298
(6) Monitor menu

This menu can be used to check the input/output status of the signals between the
KGTSM and the servo amplifier, the number of instruction pulses from the KGTSM,
and the number of motor encoder feedback pulses.

Click this.

No. 2D201-102EN*B
299
(a) In the following window, the input/output signal status can be checked. (The
following window is for the standby status in normal operation.)

+A : Active
- : Inactive

• Servo-ON : Input signal from the KGTSM to the servo amplifier

• In-position : Signal indicating stoppage of communication from the
servo amplifier to the KGTSM (SFINISH)
• Servo-ready : Indicates that the servo amplifier is ready (the signal line is
not connected).
• Servo-alarm : Alarm occurrence signal from the servo amplifier to the
KGTSM
*: Signals other than the above are not used and therefore not applicable.

No. 2D201-102EN*B
300
(b) In the following window, the number of instruction pulses from the KGTSM
and the number of motor encoder feedback pulses can be checked.

IN movement : Both the instruction pulse and the feedback pulse count up
in the + (positive) direction.

OUT movement: Both the instruction pulse and the feedback pulse count up
in the - (negative) direction.

*: The displayed value is the total movement distance after the power is
turned ON. Therefore, to perform the movement check, turn the power
OFF and then ON again.

Example: For the above window (check in the case of 600-mm IN movement)

KGTSM instruction pulse : 2000 pulses/mm × 600 mm

= 1200000 pulses OK

Feedback pulse : 5000 pulses/mm × 600 mm

= 3000000 pulses

As the stop accuracy is ±0.25 mm, when the feedback pulse count
is within the range from 2998750 to 3001250 pulses, the motor
axis operation is judged to be acceptable.
(5000 = 133.6276435 (total reduction gear ratio) × 10000
(feedback pulses per motor rotation)/85.07 (sprocket diameter)/π)

No. 2D201-102EN*B
301
(7) Alarm menu

This menu can be used to check the contents of the currently generated alarm and
the previously generated alarms (14 alarms).

Click this.

No. 2D201-102EN*B
302
(a) Alarm window

This is used to clear the alarm history.

This is used to clear the
currently generated alarm.

*: The value displayed at the beginning of the alarm contents is the alarm
code.

*: Depending on the alarm contents, it may not be possible to clear the

currently generated alarm until its cause is removed. (Refer to the alarm
code list.)

*: Of the alarms, Under voltage (alarm code 11), EEPROM parameter error
(alarm code 36), EEPROM check code error (alarm code 37), and Over
travel inhibit (alarm code 38) are not recorded in the alarm history.

No. 2D201-102EN*B
303
3.8.5.4 Alarm code list
The alarm list is given below. An alarm item marked * cannot be cleared unless the
power is turned OFF and the cause is removed.

Contents of alarm Alarm code Cause

Under voltage 11 The PN voltage of the main power supply
converter section dropped during servo ON.
Over voltage error 12 The line voltage is too high.
(253 VAC or more)
* Over current error 14 The electric current flowing in the converter
section is too large.
Overload error 16 Overload
Regenerative discharge 18 The regenerative energy exceeded the
regenerative resistor processing capacity.
* Encoder A/B-phase error 20 A missing motor encoder A/B-phase pulse
was detected.
* Encoder communication 21 Communication between the motor encoder
error and the servo amplifier was broken.
(Detection of disconnection)
* Encoder connection error 22 The connection between the motor encoder
and the servo amplifier was severed.
* Encoder communication data 23 Data from the motor encoder resulted in a
error communication error.
Position error 24 The motor operation does not follow the
instruction from the KGTSM.
Over-speed error 26 The number of motor rotations exceeded the
standard.
Command pulse sealer error 27 The parameter setting is not appropriate.
Error counter overflow 29 The deviation counter value in the servo
amplifier exceeded the standard.
* EEPROM parameter error 36 When parameters are read from the
EEPROM after the power is turned ON, the
data storage area is damaged.
* EEPROM check code error 37 The parameters read from the EEPROM
when the power was turned ON are incorrect.
Over travel inhibit 38 Both the CW and CCW drive inhibit inputs
were set to OFF.
* Other error 99 The control circuit operated incorrectly.

No. 2D201-102EN*B
304
3.8.5.5 Parameter list
The parameters that have been set are listed below. Note that this list does not include
the parameters used only by the servo amplifier manufacturer.

No. Parameter Setting

0 Axis address 1
2 Control mode set-up 0
4 Over travel input inhibit 1
6 ZEROSPD input selection 0
7 Speed monitor (SP) selection 3
8 Torque monitor (IM) selection 0
9 Warning output selection 2
0C Band rate set-up of RS232C 2
10 1st position loop gain 72
st
11 1 velocity loop gain 76
12 1st velocity loop integration time constant 58
st
13 1 detection filter 4
st
14 1 torque filter time constant 73
15 Velocity feed forward 0
16 Feed forward filter time constant 0
18 2nd position loop gain 100
nd
19 2 velocity loop gain 100
1A 2nd velocity loop integration time constant 50
nd
1B 2 speed detection filter 4
nd
1C 2 torque filter time constant 50
1D Notch frequency 500
1E Notch width selection 4
1F Disturbance torque observer 8
20 Inertia ratio 1318
21 Real time auto tuning set-up 0
22 Machine stiffness at Real time auto tuning 2
30 2nd gain action set-up 0
31 Position control switching mode 0
32 Position control switching delay time 0
33 Position control switching level 0
34 Position control switching hysteresis 0
35 Position loop gain switching time 0

No. 2D201-102EN*B
305
 No. Parameter Setting
40 Command pulse multiplier set-up 4
41 Command pulse logic inversion 0
42 Command pulse input mode set-up 1
44 Output pulses per single turn 2500
45 Pulse output logic inversion 0
46 Numerator of 1st command pulse ratio 10000
nd
47 Numerator of 2 command pulse ratio 10000
4A Multiplier of numerator of command pulse ratio 0
4B Denominator of command pulse ratio 4000
4C Smoothing filter set-up 1
4D Counter clear input 0
st
53 1 internal speed 0
54 2nd internal speed 0
rd
55 3 internal speed 0
56 4th internal speed 0
58 Acceleration time set-up 0
59 Deceleration time set-up 0
5A S-shaped accel/decel time set-up 0
5E Torque limit set-up 300
60 In-position range 100
61 ZERO speed 50
62 At-speed 1000
63 Position error limit protection 1875
64 Position error invalidation 0
66 DB inhibition at over travel limit 0
68 Sequence at alarm 0
69 Sequence at servo-off 0
6A Mechanical Brake action set-up at motor standstill 0
6B Mechanical Brake action set-up at motor in motion 0
6C External regenerative discharge resister selection 3

*: The parameters from 6D to 7F are not included in this list because their settings
must not be changed.

No. 2D201-102EN*B
306
3.8.6 Check of safety circuit on the KGTSM PWB

3.8.6.1 Purpose
(1) Check the safety signal from the operating panel

(2) Check the safety signal from the console

(3) Check the safety signal from the maintenance panel

(4) Check the function of the timers on the KGTSM PWB for the safety circuit (each
timer for tilting, vertical movement, and horizontal movement)

(5) Confirm that the slide runout detection circuit functions normally.

3.8.6.2 Checks of safety system and safety timer

Preparations for check

(1) Adjust tilting, vertical movement, and horizontal movement so that the interlock is
not engaged.

Tilting : 0°
Vertical movement : 60 mm
Horizontal movement : between OUT-2 and IN-LIMIT

(2) Perform reset operation for the KGTSM PWB to check the circuit at LED20 and
subsequent LEDs.

: Press the white switch (SW21: reset switch).

LED20 goes out and the power of the gantry stationary section is turned OFF.

: Turn OFF SW21.

LED20 lights and the power of the gantry stationary section is turned ON.

(3) Connect the personal computer to connector CN404 of the KGTSM PWB with the
service cable.

(4) Start the MTERM program on the personal computer.

(5) Turn OFF CP1.

(6) Change the KGTSM PWB DSW5 settings as follows:

DSW5

1 2 1 2
ON ON
OFF OFF
Normal setting Setting for safety
circuit check

No. 2D201-102EN*B
307
 (7) Change the KGTSM PWB DSW10 setting as follows:

DSW10

1 2 3 4 1 2 3 4
ON ON
OFF OFF
Normal setting Setting for safety
circuit check

(8) Set SW31 and SW32 to "0".

(9) Disconnect CN451 of the KGTSM PWB.

(10) The gantry/couch operation start switch on the keyboard of the console side should
remain OFF. If an operator is performing operation at the console, ask the
operator to discontinue console operation during checking.

CAUTION: Disconnect CN451 of the KGTSM PWB to turn OFF the power of
tilt motor, rotation servo system, couch etc.
If the safety circuit is defective or if your operation was
incorrect, the tilt, rotation motor or couch may move.

Procedures for checking the safety circuit

CAUTION: Check the following items again before starting inspection work.

(1) Confirm that no workers are touching parts which may cause an electric shock.

(2) Confirm that no workers (or objects) are present at a location where they may be
crushed.

(3) Confirm that CN451 on the KGTSM PWB is disconnected.

Tilting
Turn ON gantry CP1 to supply power to the system.

(1) Check of safety circuit for tilting

<Preparation>

• The AUTO SLIDE stroke is displayed on the screen of the personal computer.
• The 0 clear time is displayed on the screen of the personal computer.

<Procedure>

(a) At the personal computer, press [Enter].

: [GTS] is indicated.

No. 2D201-102EN*B
308
 (b) After "SLIDE: Can't to move" and "SLIDE: Servo Error" are displayed, enter
the address as follows:

[GTS]mm 0xa10001

: 00a10000 XXXX is indicated. (XXXX is some number.)

(c) Enter "0001" as follows:

00a10000 XXXX 0001

(d) If LED20 goes out and "DISP: 100V/200V power off" is indicated, the safety
circuit is normal.

(e) Press the RESET switch (SW21 on the KGTSM PWB).

(2) Check of the timer for the safety circuit

<Preparation>

Perform inspection after the KGTSM is started up.

• The AUTO SLIDE stroke is displayed on the screen of the personal computer.
• The 0 clear time is displayed on the screen of the personal computer.

<Procedure>

(a) At the personal computer, press [Enter].

: [GTS] is indicated.

(b) After "SLIDE: Can't to move" and "SLIDE: Servo Error" are displayed, enter
the address as follows:

[GTS]mm 0xa10001

: 00a10000 XXXX is indicated. (XXXX is some number.)

(c) Set SW1 on the KGTSM PWB ON.

(d) Press SW11 on the KGTSM PWB.

(e) Enter "0001" as follows:

00a10000 XXXX 0001

(f) Release SW11 on the KGTSM PWB.

(g) After about 1 second, if LED20 goes out, the timer is normal.

Additional information : If operation is to be interrupted, enter "." and press the

[Enter] key.

No. 2D201-102EN*B
309
Vertical movement of the couch
(1) Check of safety circuit for vertical movement

<Preparation>

Perform inspection after the KGTSM is started up.

• The AUTO SLIDE stroke is displayed on the screen of the personal computer.
• The 0 clear time is displayed on the screen of the personal computer.

<Procedure>

(a) At the personal computer, press [Enter].

: [GTS] is indicated.

(b) After "SLIDE: Can't to move" and "SLIDE: Servo Error" are displayed, enter
the address as follows:

[GTS]mm 0xc0c001

: 00c0c000 XXXX is indicated. (XXXX is some number.)

(c) Enter "0001" as follows:

00c0c000 XXXX 0001

(d) If LED20 goes out and "DISP: 100V/200V power off" is indicated, the safety
circuit is normal.

(e) Press the RESET switch (SW21 on the KGTSM PWB).

(2) Check of the timer for the safety circuit

<Preparation>

Perform inspection after the KGTSM is started up.

• The AUTO SLIDE stroke is displayed on the screen of the personal computer.
• The 0 clear time is displayed on the screen of the personal computer.

<Procedure>

(a) At the personal computer, press [Enter].

: [GTS] is indicated.

(b) After "SLIDE: Can't to move" and "SLIDE: Servo Error" are displayed, enter
the address as follows:

[GTS]mm 0xc0c001

: 00c0c000 XXXX is indicated. (XXXX is some number.)

(c) Set SW1 on the KGTSM PWB ON.

No. 2D201-102EN*B
310
 (d) Press SW11 on the KGTSM PWB.

(e) Enter "0001" as follows:

00c0c000 XXXX 0001

(f) Release SW11 on the KGTSM PWB.

(g) After about 1 second, if LED20 goes out, the timer is normal.

Horizontal movement of the couch

(1) Check of safety circuit for horizontal movement

<Preparation>

Perform inspection after the KGTSM is started up.

• The AUTO SLIDE stroke is displayed on the screen of the personal computer.
• The 0 clear time is displayed on the screen of the personal computer.

<Procedure>

(a) At the personal computer, press [Enter].

: [GTS] is indicated.

(b) After "SLIDE: Can't to move" and "SLIDE: Servo Error" are displayed, enter
the address as follows:

[GTS]mm 0xb54001

: 00b54000 XXXX is indicated. (XXXX is some number.)

(c) Enter "0010" as follows:

00b54000 XXXX 0010

(d) If LED20 goes out and "DISP: 100V/200V power off" is indicated, the safety
circuit is normal.

(e) Press the RESET switch (SW21 on the KGTSM PWB).

No. 2D201-102EN*B
311
(2) Check of the timer for the safety circuit

<Preparation>

Perform inspection after the KGTSM is started up.

• The AUTO SLIDE stroke is displayed on the screen of the personal computer.
• The 0 clear time is displayed on the screen of the personal computer.

<Procedure>

(a) At the personal computer, press [Enter].

: [GTS] is indicated.

(b) After "SLIDE: Can't to move" and "SLIDE: Servo Error" are displayed, enter
the address as follows:

[GTS]mm 0xb54001

: 00b54000 XXXX is indicated. (XXXX is some number.)

(c) Set SW1 on the KGTSM PWB ON.

(d) Press SW11 on the KGTSM PWB.

(e) Enter "0010" as follows:

00b54000 XXXX 0010

(f) Release SW11 on the KGTSM PWB.

(g) After about 1.7 seconds, if LED20 goes out, the timer is normal.

After checks
<Procedure>

(1) Turn OFF CP1.

(2) Return DSW5 and DSW10 to their original settings.

(3) Connect CN451 of the KGTSM PWB.

(4) Turn OFF SW1 on the KGTSM PWB.

(5) Turn ON CP1.

No. 2D201-102EN*B
312
3.8.6.3 Check of slide runout detection circuit

Preparations for check

(1) Perform gantry tilting, couch vertical movement, and couch-top sliding to move the
gantry, patient couch, and couch top to locations at which the corresponding
interlock is not activated.

: Set the gantry to an angle near 0°.

: Set the patient couch so that the couch height indicator reads about 60 mm.

: Set the couch top between the OUT-2 position and the IN-LIMIT position.

(2) Use the service cable to connect between the personal computer and CN404 of
the KGTSM PWB.

(3) Start up the MTERM program from the personal computer.

(4) Set gantry CP1 to OFF. (The power is turned OFF.)

Inspection
(1) Set gantry CP1 to ON to supply power.

: The AUTO SLIDE distance is displayed on the personal computer monitor

screen.

: The 0-clear time is displayed on the personal computer monitor screen.

(2) Press [ENTER] on the personal computer.

: [GTS] is displayed.

(3) Address setting

: Enter "mm 0xb54001" after [GTS].

: "00b54000 ****" is displayed. (**** is a value.)

(4) Data set

Enter "0005" after 00b54000 ****. (Type "0005".)

The couch top is now in the free status.

(5) Slowly move the couch top by hand in the IN direction.

(Criteria): When the couch top is slid 100 mm±1 mm, it must be locked.
LED20 on the KGTSM PWB must go out.
LED75 on the KGTSM PWB must light.

(6) Reset the KGTSM PWB. (Press the white switch (SW21) on the KGTSM PWB.)

: The AUTO SLIDE distance is displayed on the personal computer monitor

screen.

: The 0-clear time is displayed on the personal computer monitor screen.

No. 2D201-102EN*B
313
 (7) Press [ENTER] of the personal computer keyboard.

: [GTS] is displayed.

(8) Address setting

: Enter "mm 0xb54001" after [GTS].

: "00b54000 ****" is displayed. (**** is a value.)

(9) Data set

Enter "0005" after 00b54000 ****. (Type "0005".)

The couch top is now in the free status.

(10) Slowly move the couch top by hand in the OUT direction.

(Criteria): When the couch top is slid 100 mm±1 mm, it must be locked.
LED20 on the KGTSM PWB must go out.
LED75 on the KGTSM PWB must light.

Termination of inspection
(1) Set gantry CP1 to OFF.

(2) Disconnect the service cable.

(3) Set gantry CP1 to ON.

No. 2D201-102EN*B
E
314
1385, SHIMOISHIGAMI, OTAWARA-SHI, TOCHIGI-KEN 324-8550, JAPAN

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