4
INDUSTRIAL SEWING MACHINE INSTRUCTION MANUAL
CONTENTS
O peration instruction
1. Brief introduction 1
2. Main specifications 1
3. Installation and preparation 1
3.1 Installation 1
3.1.1 Location of the machine 1
3.1.2 Installing oil reservoir 1
3.1.3 Mounting machine head 1
3.1.4 Mounting knee lifter 2
3.1.5 Installing the motor 2
3.1.6 Connecting the clutch lever to the pedal 3
3.1.7 Installing the thread winder 3
3.1.8 Installing the thread spool stand 3
3.2 Preparation 3
3.2.1 Cleaning the machine 3
3.2.2 Examination 4
3.2.3 Precaution before start 4
4. Operation 5
4.1 Coordination between needle thread and sewing material 5
4.2 Installing the needle 5
4.3Winding the bobbin thread 5
4.3.1 Winding method 5
4.3.2 Winding adjustment 6
4.3.3 Threading 6
4.3.4 Stich length and reverse sewing control 6
4.3.5 Setting the bobbin 7
4.3.6 Drawing thread from the bobbin 7
5. Machine adjustment 7
5.1 Thread tension adjustment 7
5.2 Adjusting the pressure of presser foot 8
5.3 Use and adjustment of the safety clutch device 8
5.3.1The function of the safety clutch device 8
5.3.2 Resetting the safety clutch device 8
5.3.3 Regulating the strength on the safety clutch device 9
5.4 Upper feed adjustment 9
5.5 Presser foot lift volume adjustment 10
5.6 Hook oil amount adjustment 10
Parts manual
1. A r m par ts 11 14
2. A r m par ts 15 18
3. Upper shaft and presser foot parts 19 22
4. Needle bar motion and Lower feed par ts 23 26
5. Needle bar motion and Lower feed parts 27 30
6. Rock shaf t and thread looping parts 31 34
7. Rock shaft and thread looping par ts 35 38
8. Stitch length adjusting parts 39 40
9. K nee lifter parts 41 44
10. 45 48
11. 49 52
12. Accessories 53 54
1. Brief introduct ion
Both the models adopt straight twin-needle and two horizontal hooks with auto lubrication for thread
looping, sliding lever for thread take up to form two lines of lockstitch seam. The upper shaft and lower
shaft is connected by ball bearing and driven by teeth-type synchronic belt; plunge oil pump lubrication
system. They adopt the compound feed mechanics of feed dog, needle bar and presser foot, even if for long
stitch length and long material, They can deal with them freely.
They are widely used in factories of suitcase, tent, cushion, leather goods, apparel, mat, etc..
The dif ferencebetweenthe twomodels:
adopts twin-needle, two large horizontal hooks with auto lubrication. With the parts it can
form ten different needle gauges.
adopts single needle and form single line double lockstitch form.
2. Main Technical Specification
1 A pplication: medium and heavy duty materials
2 Max. sewing speed: 2000 pm
3 Max. Stitch length : 9 mm
4 Needle bar stroke: 36 mm
5 P resser footlift height: 8mm(by hand); 16mm(by knee)
6 Hook: large horizontal hook with auto lubrication
7 Needle: DP 17 Nm125~180
8 L ubrication: pump auto lubrication (partial of manually oiling)
9 N eedle gauge: (Twin-needle) 6.4, 3.2, 4, 4.8, 8, 9.5, 12.7, 16, 19, 25.4
10 M otor power: 0.37 kw (clutch motor)
3. Installation and preparation
3.1 Installation
3.1.1 Location of the machine
To ensure a smooth running, the machine should
1
be located on rigid and flat floor. The insert of B small
rubber mat between machine stand and floor is
oil felt B
recommended for further reducing the running noise
and vibration.
3.1.2 Oil Reservoir Installation(Fig.1)
Put the oil reservoir into the table cutout, and
place the four cushions on the four corners of the
cutout, and place oil felt into the oil reservoir.
A big
A
3.1.3 Mounting machine head(Fig.2)
2
Make the hinge (A ) of machine head engaged with
hinge socket B on the table, then turn the machine
head freely till it is seated on the frame of table
cutout.
-1-
3.1.4 Knee control presser foot lifter installation(Fig.3)
a. Installing 3
Install Connector ( A) , Bell Crank (B ,) Bell C( )
in the order shown in Fig.3.
A
B
b. Adjustment (Fig.4)
In the order of the following:
4
1.When the presser foot is at its lowest posi- B
tion, keep the crank in the position shown by b
in the figure, turn Knee Control Stop Adjusting C
Screw (C ) to touch with the oil reservoir, and
tighten the nut of Screw ( C ) .
2. When operate by knee, the presser foot lift
volume is controlled by Screw B( .) Turn the
presser foot lever down, make the bell in the po-
sition shown by a in the figure, lift the presser
foot to 13 mm, adjust Screw (B ) to touch the oil A
reservoir. Then tighten the nut of Screw ( B ).
3.1.5 Installing the motor (Fig.5) 5
Align machine balance wheel belt groove( A) with
motor pulley belt groove( B) by moving the motor( C)
leftward or rightward. Be sure the belt is not touch
with table.
A
-2-
3.1.8 In stalling the thread spool stand( F ig. )
L ocate thread spool stand at the right fr ont of
A B A B A
the table, note that spool rest may not obstruct when
machine head i s turned backward, then t ighten wood
screw.
3.2 P r epara tion
3.2.1 C leaning the machine
B efore delivery, the machine parts are coated with
rust preventive grease, whice may be hardened and con-
taminated by dust during storage and shipment. The
grease must by removed by clean cloth with gasoline.
C
3.2.2 Examination
Though every machine is confirmed by strict inspec-
tion and test before delivery, the machine parts may be
loosed or deformed after long. distance transportation
with jolt. A thorough examination must be performed
after cleaning the machine . Turn the balance wheel to
oil mark
see if there is running obstruction, parts collision,
uneven resistance or abnormal nosie. If these exist,
adjustment must be made accordingly before run.
3.2.3 Precaution before Start
a. Oil ing (F ig. )
Oil amount should be filled accordi ng to the marks
in the oil reservoir. Mark (H) refers to the highest
of oil amount; (L) refers to the lowest, be careful that
the oil amount should not be lower than Mark (L),
otherwise the machine parts can not be fed with oil
and cause overheat and collision.
-3-
b. W hen the machine s tarts f or the initial time o r
reuse af ter a l ong period of time, the proper oil
amount should be fill ed i n sections of machine shown
by arrows in Fig , .When it i s in operation, observe
the oil s parking in oil scr een to check the oil
condition.
N ote: w hen the machine needs drop oiling , do not
start before drop oiling.
c. When a new machine starts r unning, for extending
its l ife, please run at a medium and l ow speed ( 1000
pm) for a bout a month and then raise the speed 1
gradually.
d. Please turn off the power when it is not in use
or the operator leaves away fr om it . oil screen
e. R eplace the oil every month.When replacing,
fully drain off the old oil in the reservoir and add
the new one.
f. T he needle gauge options are: 6.4, 3.2 , 4, 4.8 , 8,
9.5, 12.7, 16, 19, 25.4 Fo r getting it , the throat plate,
presser foot or alternating foot, needle holder, feed
dog, left and right slidi ng plates, thread guide should
be changed. I t is provided with 6.4mm when i t leaves
off the factory, For the other size, the relevant parts
can be ordered from the factory.
-4-
4. Operation
4.1 Coordination between needle, thread and sewing
material
T he coarsenessof needle should be in accordance
with the nature of material. If stitch on heavy duty
materi al with a slim needle, the needle will be easily A
bent, s kip or thread breakage occurs, on the contrary,
clearance
stitch on tightly woven material w ith a very c oarse
needle, the material will be destroyed with over-big
needle. So the needle and thread should be properly
selected.
long groove
4.2 N eedle installation(Fig.1 ) (c)
T urn the balance wheel to li ft needle bar t o the (a)
highest position, loosen Needle Set Scre w A , fully
insert the needle shank upto the bottom of needle single needle
socket, keeping the long grooves of the two needles
opposite with each other, then tighten Screw ( A ) , F or
single needle, keep the long groove of needle facing
the l eft of the operator. See Fi g (b).
Note: Fig.(c) : insufficient insertion.
Fig.(d) : wrong direction of needle long groove
in insertion.
long groove leftward
(d) (b)
-5-
4.3.3 T hreading (Fig.1 ) R7 L7 L5 L4 L3' L3 L2' L2 L R1
Every t hread should be drawn through Thr ead H ole
( A ) , w hen use light and smooth thread (polyester or long
silk thread), i t should be drawn through Hole( B ), Keep
the thread take-up lever in it s highest position , draw
L8 R8
every thread i n the f ollowing numerical order. R2
L9 R9 R3
R4
L10 R10
R5
R6
L11
L6 detail chart
R11
L12
R12
L13
R13 thread
L11 R11
from right to left from left to right
A B A B A
4.3.4 T he stitch length and forward and reverse sewing
control (F ig.1 )
The stitch length can be regulated by Stitch
Length Dial (A ). Turn it counter-clockwise to expand
its length and clockwise to shorten its length . The
numbers on Dial ( A ) show the sizes of the stitch length C
in mm.
A
For reverse feed, press down Release Feed Lever
( C ) to perform reverse sewing , Release the lever, the
reverse feed lever can reset automatically and the
forward sewing is resumed.
-6-
4.3.5 P lacing bobbin ( F ig.1 )
N ote: when bobbin is placed into the bobbin case,
thread
the t hread should be w ound properly i n t he corr ect
direction shown in the figure.
4.3.6 D rawing thread fromthe bobbin( F ig.1 ) sliding plate
a. Draw the thread end to Bobbin Slot (1) shown in
the figure, and pull it out down through the inner
bobbin stop piece. hook
b. Hold the thread with left hand , turn the balance
wheel slowly and get the bobbin thread, then draw
them a little apart from the presser foot.
hook
sliding plate
1 thread
2 1
thread
inner stop piece
5. Machine Adjustment
5.1 T hr ead tension adjustment
A ll forms of stitches areshown inFig. .
T he normal stitch of sewing machine is shown as A
F ig.(A ) I f stitch is abnormal , the puckering andthread Normal
breakage will occur, and the needle thread tension and B
bobbin thread tension should be adjusted so that the
normal s titch can be obtained.
a. I f t he stitch seam shows as Fig. B , indicates
that the n eedle t hread o r bobbin t hread tension
is t oo l oose , then turn the thread tension screw
counter-clockwise t o r elease t he n eedle t hread
pressure; or t urn the adjusting screw with a loosen
screwdriver t o increase the bobbin thread ten-
s ion.( see Fig. , ) tension adjusting screw
tighten
-7-
b. If the needle thread is too loose and the bobbin
thread is too tight, then shows as Fig. C, And
turn the threadtension screw clockwiseto increase
the n eedle thread tension; or turn loose the
bobbin l ace screw to reduce the bobbin thread
needle thread tension
tension. (See Fig. , )
F or special sewing wit h special thread, the ten-
sion needed can be obtained by adjusting the power and increase
stroke of the thread take-up spring.
reduce
5.2 A dj usting the pressure of presser foot (Fig. )
The pressure of the presser foot should be adjust-
ed according to the thickness of the sewing materials.
If stitch on heavy duty material, the pressure should
be increased and turn the pressure adjusting screw on increase
reduce
the back of the arm clockwise if reduce the pressure,
turn i t c ounter-clockwise. pressure adjusting screw
5.3 U se and adjustment of thesafety clutch device
T he f unction of the safet y clutch device i s to
prevent the hook and teeth-belt from destroy when the
needle thread is drawn into the hook for adnormal load
during the operation.
5.3.1 T he f unction of the safety clutch device(Fig.2 )
a. When the safety clutch device is functioning, safety clutch device
the teeth-belt will remove the load and the rock teeth - belt pulley
shaft will stop rotating, only the upper shaft
rotates, and the machine stops work. shaft
b. Clean off the needle thread which is drawn in
the hook.
c. Turn the shaft of the teeth-belt with hand to
check if the rock shaft can turn smoothly, then
reset the safety clutch device.
5.3.2 Resetting the safety clutch device.
balance wheel
a. While press down the button in the bed surface
with left hand, turn the balance wheel slowly
with right hand in the direction shown in Fig.
2 .
button
-8-
b. When the stop plate stops the balance wheel,
more strength is needed to turn the balance
wheel to reset the safety clutch device.
C. Release the button in the bed. So the resetting
of i t is OK. (See Fig.2 )
stop plate
5.3.3 Regulating the strength on the safety clutch
d evice(Fig.2 )
a. When the white mark of the eccentric pin aims
at the center of the rock shaft, indicates that
the strength on the safety clutch device is the
white mark belt
minimun.When the white mark points outward, the eccentric
strength is properly increased. tighten set screw
b. For regulating the strength of it, move the teeth
- belt and loosen the set screw of the eccentric
pin, and turn the eccentric pin. loosen
c. After regulation, please tighten the set screw. lower shaft eccentric
5.4 U pper feed a djustment (Fi g.2 )
I f the upper and lower fee d are not in timing
during s ewing, the long hole of the horizontal feed
horizontal shaft crank
crank should be adjusted to get the length of upper
button
feed.
Adjust as the following: reference line upper layer feed reduce
a. Loosen the special screw.
b. Move the special screw upward to reduce the feed link
amountor upper layer of material. special screw
c. Move the special screw downward to increase the upper layer feed increase
feed amount. Theoretically when it is on the
reference line of the horizontal feed crank, the
upper feed amount equals to the lower feed
amount.
d. After adjustment, tighten the special screw.
-9-
5.6 H ook oil am ount adjustment (Fig. )
I t a dopts plunger f ull auto lubrication s ystem,
even at very l ow speed, it can supply and suck oil v ery
well. G enerally only the hook oil amount can be ad-
justed, the other can not be adjusted. The hook oil
amount c an be obtained by the oil a mount adjusting oil amount increase reduce
screw. First l oosen the nut of t he adjusting screw, adjusting screw
turn the s crew clockwise to i ncrease the oil amount, nut
on the c ontrary reduce the oil amount. After adjust-
ment, tighten the nut.
-10-
1 800 268 1649
www.reliablecorporation.com
