Rev 1
2100 Detector Elevator Calibration
Time: 10 min – Personnel: 1 field engineer
1 SUPPLIES
None.
2 TOOLS
_ Standard Engineer’s toolkit.
_ Laptop computer.
_ Positioner service tools software.
_ Tape mesure
Note: For elevator calibration checks only, go directly to section 6.
3 SAFETY PRECAUTIONS
None.
4 PREREQUISITES
DO NOT RESET ANYTHING or POWER OFF BEFORE LEAVING THE LIMIT
SWITCH STATE.
If the problem exists invert the elevator MCB with an other and leave the limit switch
Remove the square cover 2 screws
Rev 1
5 PROCEDURE
1. Chosse “calibrate” on Positioner service tools
2. Disable Travels limits, potentiometer control & Anticollision
3. Select “Lift”
4. Click “NEXT”
Rev 1
5.1 Low Setpoint
1. Remove the blind cover
2. Move the elevator to the calibration mark for the low setting. Align the calibration mark with the alignment point in the
elevator housing
Calibration Mark
3. Enter Calibration value 135 in the window « calibration value » box.
4. Click “Calibrate”. (a reset occurs, wait for end of positioner reboot)
5. Click “NEXT” (current position is updated)
5.2 High Setpoint
1. Move the elevator to the calibration mark for the High setting. Align the calibration mark with the alignment point in the
elevator housing
Rev 1
Calibration Mark
2. Enter Calibration value 458 in the window « calibration value » box.
3. Click “Calibrate”. (a reset occurs, wait for end of positioner reboot)
6. Clik “NEXT” (current position is updated)
Rev 1
5-3 Final setpoints
Final Low Setpoint
Perform this section after completing LC alignments. Use Preliminary Set Points to calibrate the detector elevator prior to
alignment.
1. Select Calibrate, Lift, Click NEXT.
The system then prompts for the Low Setpoint position.
2. Position the table top at isocenter height (1070 mm to the floor).
3. Move the LC horizontal pivot to 0° and the C–arc to 0° .
4. Move the detector elevator in towards the table top to the calibration mark for the low setting .
5. Extract the grid of 50 mm, Measure and record the distance from the under the grid to the top of table top
Final Low Setpoint
Distance from under
grid to table top at
Isocenter
Final Low Setpoint (in millimetres)= Value recorded + 13.8mm = _________
6. Enter the Final Low Setpoint in the window « calibration value » box »
7. Click CALIBRATE. (a reset occurs, wait for end of positioner reboot)
8. Click NEXT. (current position is updated)
Rev 1
Final High Setpoint
1. Move the Elevator from isocenter to the high setting calibration mark.
2. Measure and record the distance from the under the grid to the top of table.
Final High Setpoint
Distance from under
grid to table top at
Isocenter
Final High Setpoint (in mm) = Value recorded + 13.8mm = _________
9. Enter the final high set point in the window « calibration value » box
10. Click CALIBRATE. (a reset occurs, wait for end of positioner reboot)
11. Click NEXT. (current position is updated)
Rev 1
6 ELEVATOR CALIBRATION CHECKS
6-1 Calibration check
Before checking calibration, disable overrides.
1. Verify that the elevator can be driven between the software limits without hitting a limit switch.
2. Verify that the elevator can be driven through its full range of travel without a pot/encoder mismatch error
3. If “LIFT AXIS POT ENCODER MISMATCH” error occurs disable the potentiometer:
6-2 Encoder Check
1. Move the axis to its highest setpoint and note in the space provided the position displayed on the screen.
HSP=____________
2. Move the axis to its lowest setpoint and note in the space provided the position displayed on the screen.
LSP=___________
3. Calculate HSP – LSP = ____________
4. If HSP – LSP is not 323 +/-20, the encoder, its circuitry, and its power supply should be checked before proceeding,
as there could be damage.
Note: If HSP_LSP is just out of range, be sure that the unit is positioned precisely at the calibration point.
6-3 Potentiometer check
If the encoder check is successful, perform the following:
1. Drive the axis into position so that the display shows a reading of LSP + 160 ± 20.
2. Check that 1.65 volts (± 0.15 V) is present at PP7 on the MCB.
3. If the voltage is not correct or not present:
– Disengage the potentiometer.
– Turn it manually in order to read 1.65 V (± 0.15 V) at PP7.
– Re–engage it and perform a new calibration.
4. If the new calibration is not OK, check;
– Potentiometer.
– Potentiometer circuitry.
- Potentiometer power supply on MCB.
