typical TW1-2B Technical manual

OPERATION INSTRUCTION / PARTS MANUAL
R
Single Needle Top and Bottom Feed Extra
Heavy-duty Lockstitch Sewing Machine
TW1-2B/TW1-2BL20

ADD: WANPING TOWN, WUJIANG CITY, JIANGSU
PROVINCE, CHINA
TEL: +86-512-
FAX: [phone]
Http://www.typicalwpchina.com
E-mail:[email protected]
63391278
POST. CODE: 215223
TYPICAL SEWING MACHINE WANPING MACHINERY CO.,LTD.
Please don't adjust and repair the machine by non-professionals,except adjusting stitch.
Specifications subject to change without notice

CONTENTS
Operation instructionOperation instruction
Parts manualParts manual
1. Brief introduction
2. Main technical specification
3. Operation and preparation
4. Installing the clutch motor
5. Connecting the clutch motor lever to the pedal
6. Connecting the presser foot lift control pedal
7. Installing the belt guard
8. Installing the bobbin winder
9. Lubrication
10. Trail run
11. Installing the needle
12. Coordination among the needle, the thread and the material
13. Threading the needle thread
14. Winding adjusting
15. Adjusting the forward stitch length and reverse stitch length
16. Oiling the thread take-up part
17. Adjusting the pressure of presser foot
18. Installing the bobbin and adjusting the thread tension
19. Adjusting the thread take-up spring
20. Adjusting the tension of needle thread and bobbin thread
21. Timing between he needle and the rotating hook
22. Installing and uninstalling the hook
23. Installing the hook stop bracket
24. Installing the Feed dog
25. Feed timing adjustment
26. Upper feed adjustment
27. Adjusting the clearance between presser foot and walking foot
28. Periodical cleaning
1. Arm and bed
2. Thread take-up mechanism
3. Bottom feed mechanism
4. Presser bar mechanism
5. Upper feed mechanism
6. Accessories
1. Brief introduction
2. Main technical specification
3. Operation and preparation
4. Installing the clutch motor
5. Connecting the clutch motor lever to the pedal
6. Connecting the presser foot lift control pedal
7. Installing the belt guard
8. Installing the bobbin winder
9. Lubrication
10. Trail run
11. Installing the needle
12. Coordination among the needle, the thread and the material
13. Threading the needle thread
14. Winding adjusting
15. Adjusting the forward stitch length and reverse stitch length
16. Oiling the thread take-up part
17. Adjusting the pressure of presser foot
18. Installing the bobbin and adjusting the thread tension
19. Adjusting the thread take-up spring
20. Adjusting the tension of needle thread and bobbin thread
21. Timing between he needle and the rotating hook
22. Installing and uninstalling the hook
23. Installing the hook stop bracket
24. Installing the Feed dog
25. Feed timing adjustment
26. Upper feed adjustment
27. Adjusting the clearance between presser foot and walking foot
28. Periodical cleaning
1. Arm and bed
2. Thread take-up mechanism
3. Bottom feed mechanism
4. Presser bar mechanism
5. Upper feed mechanism
6. Accessories
1
1
1
1
2
2
2
3
3
4
4
4
5
5
5
6
6
6
7
7
8
9
9
9
10
11
11
11
12-13
14-15
16-17
18-19
20-21
22-23

Operation Instruction

A
B
C
Max. Sewing speed
Max. Stitch length
Presser foot lifting
Alternate press foot
lifting range
Timing of walking foot
and feed dog
Rotating hook
Needle
Lubrication
Clutch motor
Max. Sewing speed
Max. Stitch length
Presser foot lifting
Alternate press foot
lifting range
Timing of walking foot
and feed dog
Rotating hook
Needle
Lubrication
Clutch motor
-1-
1
Model TW1-2B/2BL20 extra heavy duty top and
bottom feed lockstitch sewing machine with large
hook adopts single straight needle, link thread
take-up, high precise bevel gears driving, large hook
catching thread. With special upper feed mechanism,
the machine shows its good performance on sewing
extra heavy duty and extra thick thread.
It is widely used on sewing suitcas s, leather, sofa,
tents, bamboo matting, ect.
.
.
e
Model TW1-2B/2BL20 extra heavy duty top and
bottom feed lockstitch sewing machine with large
hook adopts single straight needle, link thread
take-up, high precise bevel gears driving, large hook
catching thread. With special upper feed mechanism,
the machine shows its good performance on sewing
extra heavy duty and extra thick thread.
It is widely used on sewing suitcas s, leather, sofa,
tents, bamboo matting, ect.
(1) Cleaning the machine
Before delivery, the machine parts are coated with
rust preventive grease, which maybe hardened and
contaminated by dust during storage and shipment.
The grease and dust must be removed by clean cloth
with gasoline.
(2) Examination
Though every machine is confirmed by strict
inspection and test before delivery, the machine parts
maybe loosed or deformed after a long distance
transportation with jolt. A thorough examination
must be performed after cleaning the machine. Turn
the balance wheel to see if there is running
obstruction, parts collision, uneven resistance or
abnormal noise. If there exist adjustment must be
made accordingly before running.
.
.
.
.
(1) Cleaning the machine
Before delivery, the machine parts are coated with
rust preventive grease, which maybe hardened and
contaminated by dust during storage and shipment.
The grease and dust must be removed by clean cloth
with gasoline.
(2) Examination
Though every machine is confirmed by strict
inspection and test before delivery, the machine parts
maybe loosed or deformed after a long distance
transportation with jolt. A thorough examination
must be performed after cleaning the machine. Turn
the balance wheel to see if there is running
obstruction, parts collision, uneven resistance or
abnormal noise. If there exist adjustment must be
made accordingly before running.
Align machine balance wheel belt groove (A) with
motor pulley belt groove (B) by moving motor
leftward or rightward. .
Align machine balance wheel belt groove (A) with
motor pulley belt groove (B) by moving motor
leftward or rightward.
1. Brief introduction
3. Operation and preparation
4. Installing the clutch motor (Fig. 1)
2. Main technical specification
1200s.p.m
13mm
13mm by hand, over 13mm by knee13mm by hand, over 13mm by knee
4mm 6mm4mm 6mm
Max stroke is more than 13mmMax stroke is more than 13mm
Extra large hookExtra large hook
DDX1 24 27
##
DDX1 24 27
##
Lubricated by handLubricated by hand
0.5KW
TW1-2B TW1-2BL20
Model
Parameter
900s.p.m

A
B
C
D
E
-2-
2
3
4
A. The optimum tilt angle of pedal with floor is
approx. 20 30 degree.
B. Adjust the clutch of motor so that clutch lever
(c) and draw bar (B) run in line, the machine would
have stable motion and long using.
C. The machine balance wheel should rotate
counterclockwise for normal sewing when view
form opposite side of the balance wheel the motor
rotates in the same direction. The rotation can be
reversed by reversing (turn over 180 degree) the
plug of the motor.
D. Adjust the tension of V-belt (F) by moving the
motor vertically. The proper tension of V-belt is a
slack of 10 12mm when the belt is depressed by
finger.
.
.
.
.
A. The optimum tilt angle of pedal with floor is
approx. 20 30 degree.
B. Adjust the clutch of motor so that clutch lever
(c) and draw bar (B) run in line, the machine would
have stable motion and long using.
C. The machine balance wheel should rotate
counterclockwise for normal sewing when view
form opposite side of the balance wheel the motor
rotates in the same direction. The rotation can be
reversed by reversing (turn over 180 degree) the
plug of the motor.
D. Adjust the tension of V-belt (F) by moving the
motor vertically. The proper tension of V-belt is a
slack of 10 12mm when the belt is depressed by
finger. .
.
.
.
First the hook A should be connected to the chain
B and presser foot lift lever C, then put the pedal
compl te D on the stand. Move the control pedal E
leftward or rightward until the chain becomes on one
line. Tighten the bolts and nuts. Finally, connect the
finger to the control pedal.
e
.
First the hook A should be connected to the chain
B and presser foot lift lever C, then put the pedal
compl te D on the stand. Move the control pedal E
leftward or rightward until the chain becomes on one
line. Tighten the bolts and nuts. Finally, connect the
finger to the control pedal. .
e
Please install the belt guard for safety.
5. Connecting the clutch motor lever to
the pedal (Fig. 2)
6. Connecting the presser foot lift
control pedal (Fig. 3) .
7. Installing the belt guard (Fig. 4)
10 12mm
20 30
A
B
C
D
E
F
G

A
B
C
E
C
D
-3-
Align pulley (B) of the bobbin winder with the
outside of the belt (C). And there should be a proper
clearance between them so that the pulley can be
contacted with the belt when stop latch thumb lever
(A) is depressed. Thereby the belt drivers the pulley
(B) while the machine running, the bobbin winder
should be parallel with belt slit (E) of the table. Then
tighten the two wood screws. .
Align pulley (B) of the bobbin winder with the
outside of the belt (C). And there should be a proper
clearance between them so that the pulley can be
contacted with the belt when stop latch thumb lever
(A) is depressed. Thereby the belt drivers the pulley
(B) while the machine running, the bobbin winder
should be parallel with belt slit (E) of the table. Then
tighten the two wood screws. .
The places with red marks must be add
oil after the machine finish running daily. Then keep
running the machine for 1 2 minutes.
enough
.
The places with red marks must be add
oil after the machine finish running daily. Then keep
running the machine for 1 2 minutes. .
enough
8. Installing the bobbin winder (Fig. 5)
9. Lubrication (Fig. 6)
5
6

-4-
7
8
When the machine left out of operation for a quite
long time and used again or a new complete machine,
remove the rubber plug and face plate on the top of
the machine head, oil it thoroughly. Then lift the
presser foot and run the machine at a low speed of
200 400 spm. After the machine is lubricated fully,
keep t ial running the machine for 30 minutes, and
then increase the speed gradually. After months
running to prefect its performance, then increase up
to its proper sewing speed.
r
.
When the machine left out of operation for a quite
long time and used again or a new complete machine,
remove the rubber plug and face plate on the top of
the machine head, oil it thoroughly. Then lift the
presser foot and run the machine at a low speed of
200 400 spm. After the machine is lubricated fully,
keep t ial running the machine for 30 minutes, and
then increase the speed gradually. After months
running to prefect its performance, then increase up
to its proper sewing speed. .
r
Turn the balance wheel to lift needle bar to its
highest position, loosen needle set screw (1), keeping
the long groves facing to the left side of operator, and
now fully insert the needle shank upto the bottom of
needle clamp. Last tighten the screw (1) to fix the
needle. .
Turn the balance wheel to lift needle bar to its
highest position, loosen needle set screw (1), keeping
the long groves facing to the left side of operator, and
now fully insert the needle shank upto the bottom of
needle clamp. Last tighten the screw (1) to fix the
needle. .
Please use the left-twisted needle thread and the
left-twisted or right-twisted bobbin thread. Shown as
Fig. 10, holding the thread, twist it with right hand in
the direction of arrow, if it becomes tight, it is
left-twisted thread. Otherwise, it is right-twisted
thread.
Please use the model DDX1 24# 27# needle.
The needle must be suitable for the materials. Sewing
too heavy-duty materials and using too thin needle,
the needle would be broken, thread skipping and
breaking. If the needle too heavy, it would damage
the fabric. So please choose the suitable needle
according to the materials.
.
.
Please use the left-twisted needle thread and the
left-twisted or right-twisted bobbin thread. Shown as
Fig. 10, holding the thread, twist it with right hand in
the direction of arrow, if it becomes tight, it is
left-twisted thread. Otherwise, it is right-twisted
thread. .
Please use the model DDX1 24# 27# needle.
The needle must be suitable for the materials. Sewing
too heavy-duty materials and using too thin needle,
the needle would be broken, thread skipping and
breaking. If the needle too heavy, it would damage
the fabric. So please choose the suitable needle
according to the materials. .
Note: Fig (b): no fully insertion
Fig (c): wrong direction of long groove in
insertion
Note: Fig (b): no fully insertion
Fig (c): wrong direction of long groove in
insertion
10. Trail run
11. Installing the needle (Fig. 7)
12. Coordination among the needle, the
thread and the material (Fig. 8)
Long groove leftward
Clearance
a
bc

a
b
c
d
e
f
g
h
i
j
K
C
E
A
B
D
abcd
A
B
C
D
-5-
When threading the needle thread, the needle bar
must be its highest position. The correct threading
stepsasbelow: .
When threading the needle thread, the needle bar
must be its highest position. The correct threading
stepsasbelow: .
Bobbin thread should be neat and tight. If not,
adjust the thread tension by turning tension stud
thumbnut (A) of bobbin winder tension bracket.
When the bobbin thread layer cannot present a
cylindrical shown as Fig. a. loosen the tension
bracket screw (B) and move the tension bracket
leftward or rightward. If the thread is as shown in
Fig. b, move the tension bracket rightward. If the
thread is as shown in Fig c, move the tension bracket
leftward. Till the thread as shown in Fig. a, tight the
screw.
Note: Nylon or polyester thread should be wound
with light tension, otherwise bobbin (D) may be
broken or deform. Do not overfill the bobbin, the
optimum capacity of thread will fill about 80% of
bobbin outside diameter. This can be adjusted by
stop latch screw (E).
.
.
Bobbin thread should be neat and tight. If not,
adjust the thread tension by turning tension stud
thumbnut (A) of bobbin winder tension bracket.
When the bobbin thread layer cannot present a
cylindrical shown as Fig. a. loosen the tension
bracket screw (B) and move the tension bracket
leftward or rightward. If the thread is as shown in
Fig. b, move the tension bracket rightward. If the
thread is as shown in Fig c, move the tension bracket
leftward. Till the thread as shown in Fig. a, tight the
screw.
Note: Nylon or polyester thread should be wound
with light tension, otherwise bobbin (D) may be
broken or deform. Do not overfill the bobbin, the
optimum capacity of thread will fill about 80% of
bobbin outside diameter. This can be adjusted by
stop latch screw (E). .
.
Stitch length can be adjusted by moving adjusting
spanner (A). Turning the adjusting spanner clockwise,
the stitch will be shorter. Otherwise, the stitch length
will be longer. After finishing adjustment, take a
paper to test the stitch length until obtaining the
satisfied stitch length. Then check if the forward
stitch length is same as reverse stitch length. If the
reverse stitch length is shorter than forward stitch,
turn the screw (C) counter clockwise, and then
tighten the nut. Otherwise, turn the screw clockwise.
It also can be adjusted by turn screw (D). .
Stitch length can be adjusted by moving adjusting
spanner (A). Turning the adjusting spanner clockwise,
the stitch will be shorter. Otherwise, the stitch length
will be longer. After finishing adjustment, take a
paper to test the stitch length until obtaining the
satisfied stitch length. Then check if the forward
stitch length is same as reverse stitch length. If the
reverse stitch length is shorter than forward stitch,
turn the screw (C) counter clockwise, and then
tighten the nut. Otherwise, turn the screw clockwise.
It also can be adjusted by turn screw (D). .
(a) Long thread retainer
(b) Short thread retainer
(c) Small thread tension disc
(d) Big thread finger
(e) Big thread tension disc and take-up spring
(f) Big thread finger
(g) Thread take-up lever
(h) Small thread finger
(i) Thread guide
(j) Thread retainer
(k) Thread guide ring
(a) Long thread retainer
(b) Short thread retainer
(c) Small thread tension disc
(d) Big thread finger
(e) Big thread tension disc and take-up spring
(f) Big thread finger
(g) Thread take-up lever
(h) Small thread finger
(i) Thread guide
(j) Thread retainer
(k) Thread guide ring
13. Threading the needle thread (Fig. 9)
14. Winding adjusting (Fig. 10)
15. Adjusting the forward stitch length
and reverse stitch length (Fig. 11)
9
10
11

A
B
ab
A
IncreaseIncrease
DecreaseDecrease
Screw
-6-
12
13
14
Thread take-up parts adopt woolen thread oiling.
After a long time using, its function lost. So it must
be replaced with a new one. Steps as below:
Thread take-up parts adopt woolen thread oiling.
After a long time using, its function lost. So it must
be replaced with a new one. Steps as below:
Pressur on presser foot is to be adjusted in
accordance with materials to be sewn. Loosen the
locknut (A). If heavy materials to be sewn, turn the
presser regulation thumbscrew clockwise as shown in
Fig (a) to increase the pressure. While light materials
to be sewn, turn the pressure regulating thumbscrew
counter clockwise as show in Fig. (b) to decrease the
presser on presser foot. Then tighten the lock nut (A).
The pressure on presser foot is proper as the
materials can be fed normally.
e
.
Pressur on presser foot is to be adjusted in
accordance with materials to be sewn. Loosen the
locknut (A). If heavy materials to be sewn, turn the
presser regulation thumbscrew clockwise as shown in
Fig (a) to increase the pressure. While light materials
to be sewn, turn the pressure regulating thumbscrew
counter clockwise as show in Fig. (b) to decrease the
presser on presser foot. Then tighten the lock nut (A).
The pressure on presser foot is proper as the
materials can be fed normally. .
e
The tension on thread can be adjusted according
to the materials and different types of thread.
Normally, adjust the thread tension according to the
sewing stitches. Adjust the sewing stitches by
changing the tension on bobbin thread and needle
thread.
Increase or decrease the bobbin thread tension by
using the small screwdriver to turn the screw on
bobbin case.
Depend on the tension on bobbin case, by changing
the take-up spring tension & range, the tension of
tension spring, the position of tension disc and
thread finger to adjust the needle thread tension.
.
.
.
The tension on thread can be adjusted according
to the materials and different types of thread.
Normally, adjust the thread tension according to the
sewing stitches. Adjust the sewing stitches by
changing the tension on bobbin thread and needle
thread. .
Increase or decrease the bobbin thread tension by
using the small screwdriver to turn the screw on
bobbin case.
Depend on the tension on bobbin case, by changing
the take-up spring tension & range, the tension of
tension spring, the position of tension disc and
thread finger to adjust the needle thread tension. .
.
(1) Open the faceplate remove the pressure screw,
lock nut and adjusting bar.
(2) Remove the pin (A) and draw out the old oil
wick.
(3) Draw out the oil wick in the part (B).
(4) Change the new oil wicks.
(5) Installing is a reverse sequence.
(1) Open the faceplate remove the pressure screw,
lock nut and adjusting bar.
(2) Remove the pin (A) and draw out the old oil
wick.
(3) Draw out the oil wick in the part (B).
(4) Change the new oil wicks.
(5) Installing is a reverse sequence.
16. Oiling the thread take-up parts
(Fig. 12)
17. Adjusting the pressure of presser
foot (Fig. 13)
18. Installing the bobbin and adjusting
the thread tension (Fig. 14)

a
b
c
d
e
A
B
a
b
a
b
-7-
The normal sewing range of thread take-up spring
is 5 8mm. For sewing light duty materials (small
stitch length), weaken the spring tension and widen
the sewing range of spring. While for sewing heavy
duty materials, strengthen the spring tension and
shorten the sewing range of spring.
(1) Adjusting the thread take-up spring tension
Turn the tension screw (A) clockwise for increasing
the tension. Otherwise turn the tension screw (A)
counter clockwise for decreasing the tension.
(2) Adjusting the sewing range of thread take-up
spring
Loosen the tension screw (A) and the turn the
tension disc (B). Turn the tension disc clockwise for
increasing the range of thread take-up spring.
Otherwise, turn the tension disc counter clockwise
for decreasing the range of thread take-up spring.
Before delivery, the thread take-up spring is
properly adjusted. Readjustment is needed only in the
case of sewing special materials or with special
thread.
.
.
.
.
.
The normal sewing range of thread take-up spring
is 5 8mm. For sewing light duty materials (small
stitch length), weaken the spring tension and widen
the sewing range of spring. While for sewing heavy
duty materials, strengthen the spring tension and
shorten the sewing range of spring.
(1) Adjusting the thread take-up spring tension
Turn the tension screw (A) clockwise for increasing
the tension. Otherwise turn the tension screw (A)
counter clockwise for decreasing the tension.
(2) Adjusting the sewing range of thread take-up
spring
Loosen the tension screw (A) and the turn the
tension disc (B). Turn the tension disc clockwise for
increasing the range of thread take-up spring.
Otherwise, turn the tension disc counter clockwise
for decreasing the range of thread take-up spring.
Before delivery, the thread take-up spring is
properly adjusted. Readjustment is needed only in the
case of sewing special materials or with special
thread. .
.
.
.
.
Normal stitch should be as shown in fig (a). When
abnormal stitches occur with puckering or thread
breakage, the tension of needle thread and bobbin
thread must be adjusted.
a. If the needle thread is too strong or the bobbin
thread is too weak, turn the tension regulating thumb
nut counter clockwise to make the needle thread get
less tension or tighten the bobbin case tension
regulating screw with a small screw driver to make
the bobbin thread get more tension.
b. If the needle thread tension is too weak or the
bobbin thread is too strong , turn the tension
regulating thumb nut clockwise to make the needle
thread get more tension or turn the bobbin case
tension regulating screw counter clockwise with a
small screw driver to make the bobbin thread get
less tension.
c. Other abnormal stitches as shown in Fig (d),
(e), adjustment can be made which reference to
above methods.
A
A
A
.
the
Normal stitch should be as shown in fig (a). When
abnormal stitches occur with puckering or thread
breakage, the tension of needle thread and bobbin
thread must be adjusted. A
a. If the needle thread is too strong or the bobbin
thread is too weak, turn the tension regulating thumb
nut counter clockwise to make the needle thread get
less tension or tighten the bobbin case tension
regulating screw with a small screw driver to make
the bobbin thread get more tension. A
b. If the needle thread tension is too weak or the
bobbin thread is too strong , turn the tension
regulating thumb nut clockwise to make the needle
thread get more tension or turn the bobbin case
tension regulating screw counter clockwise with a
small screw driver to make the bobbin thread get
less tension. A
c. Other abnormal stitches as shown in Fig (d),
(e), adjustment can be made which reference to
above methods. .
the
19. Adjusting the thread take-up spring
(Fig. 15)
20. Adjusting the tension of needle thread
and bobbin thread (Fig. 16,17)
15
17
16

-8-
18
19
(1) Adjusting the position of needle bar.
Turn the balance wheel to make the needle bar (B)
to its lowest position. Remove the face plate (A), and
move the needle bar (B) vertically to locate the timing
position (the timing position of the needle bar is:
when the needle bar at its lowest position, the center
of needle eye (C) coincide with the inside surface (D)
of rotating hook). Tighten the screw.
.
.
.
.
.
(2) Adjusting timing between rotating hook and
needle.
The motive relation between rotating hook and
needle affects the sewing quality. Standard timing
relation is: Turn the balance wheel to locate the
needle bar to its lowest position and lift back 3.8mm
height. The rotating hook head point (D) should be
coincides with the needle centerline (C). At this time,
the hook head point (D) is 2 2.5mm higher than the
needle eye (E).
When adjusting the timing relation, also please
notice the clearance between the hook head point and
side of needle. The clearance should be 0 0.1mm.
(1) Adjusting the position of needle bar. .
Turn the balance wheel to make the needle bar (B)
to its lowest position. Remove the face plate (A), and
move the needle bar (B) vertically to locate the timing
position (the timing position of the needle bar is:
when the needle bar at its lowest position, the center
of needle eye (C) coincide with the inside surface (D)
of rotating hook). Tighten the screw. .
(2) Adjusting timing between rotating hook and
needle. .
The motive relation between rotating hook and
needle affects the sewing quality. Standard timing
relation is: Turn the balance wheel to locate the
needle bar to its lowest position and lift back 3.8mm
height. The rotating hook head point (D) should be
coincides with the needle centerline (C). At this time,
the hook head point (D) is 2 2.5mm higher than the
needle eye (E). .
When adjusting the timing relation, also please
notice the clearance between the hook head point and
side of needle. The clearance should be 0 0.1mm. .
21. Timing between the needle and the
rotating hook (Fig. 18,19)
C
D
E
2~2.5mm
3.8mm
0~0.10mm
D
C
A
B
A
B
C
D

A
B
C
1.1~1.3mm
1.2~1.5mm
B
C
A
D
E
B
A
1.5mm
A
-9-
Lift the needle bar to its highest position; remove
the needle plate, needle and bobbin case. Loosen the
bobbin case holder bracket screw (C), and take out
position bracket (A). Then loosen the set screw (B)
to make the rotating hook can be turned freely on its
axis. Turn the balance wheel to raise feed dog
support. At this time, take down the rotating hook
slowly while turning it to keep away f om the feed
dog support. Installing the hook can be done in
reverse sequence.
The projecting flange of position bracket (A)
should be engaged in the notch of the bobbin case
holder. And the clearance between them should be
1.1 1.3mm.
r
.
.
Lift the needle bar to its highest position; remove
the needle plate, needle and bobbin case. Loosen the
bobbin case holder bracket screw (C), and take out
position bracket (A). Then loosen the set screw (B)
to make the rotating hook can be turned freely on its
axis. Turn the balance wheel to raise feed dog
support. At this time, take down the rotating hook
slowly while turning it to keep away f om the feed
dog support. Installing the hook can be done in
reverse sequence. .
The projecting flange of position bracket (A)
should be engaged in the notch of the bobbin case
holder. And the clearance between them should be
1.1 1.3mm. .
r
Before installing the stop bracket (E), loosen the
screw (D) first. Adjust the clearance between the
stop bracket and hook to keep it be 1.2 1.5mm.
And keep the elastic tension of stop spring head (C)
1 1.2mm so that the stop spring head can limit the
bobbin case effectively. Besides, please don't let the
(C) touch the (B) by adjust their position. Last tighten
the screw (D). .
Before installing the stop bracket (E), loosen the
screw (D) first. Adjust the clearance between the
stop bracket and hook to keep it be 1.2 1.5mm.
And keep the elastic tension of stop spring head (C)
1 1.2mm so that the stop spring head can limit the
bobbin case effectively. Besides, please don't let the
(C) touch the (B) by adjust their position. Last tighten
the screw (D). .
A. When the feed amount is at the max., the front
end of feed dog (A) is near the front of needle plate
slot. The gauge between them is 1.5mm. This is the
standard position of feed dog.
B. To adjust the position of feed dog, move the
feed to the front end of needle plate, loosen the screw
(A) (See Fig23b), move the feed dog support (B) in
the direction show by arrow in Fig. 23b to adjust it.
After adjustment, tighten the screw (A).
.
.
A. When the feed amount is at the max., the front
end of feed dog (A) is near the front of needle plate
slot. The gauge between them is 1.5mm. This is the
standard position of feed dog. .
B. To adjust the position of feed dog, move the
feed to the front end of needle plate, loosen the screw
(A) (See Fig23b), move the feed dog support (B) in
the direction show by arrow in Fig. 23b to adjust it.
After adjustment, tighten the screw (A). .
22. Installing and uninstalling the hook
(Fig. 20)
23. Installing the hook stop bracket
(Fig. 21)
24. Installing the Feed dog (Fig. 22,23)
20
23
22
21

-10-
24
25
26
(1) Standard position
(2) Installing the feed dog lift cam
(3) Installing the feed cam
Turn the balance wheel to lower feed dog (A)
until it is horizontal with the surface (B) of needle
plate. At this moment, the tip of needle (C) should be
horizontal with the surface of needle plate and feed
dog.
Adjustment can be done by adjusting the position
of feed cam and feed dog lift cam.
.
.
Turn the balance wheel to lower feed dog (A)
until it is horizontal with the surface (B) of needle
plate. At this moment, the tip of needle (C) should be
horizontal with the surface of needle plate and feed
dog. .
Adjustment can be done by adjusting the position
of feed cam and feed dog lift cam. .
Open the backside cover; turn the balance wheel
by left hand counter clockwise to lift the needle bar
to its highest position. Now the first screw of lift cam
(direction of counter clockwise ) has a tilt angle with
counter-cl ckwise is 45 degree. Then tighten the
screw.
o
.
Open the backside cover; turn the balance wheel
by left hand counter clockwise to lift the needle bar
to its highest position. Now the first screw of lift cam
(direction of counter clockwise ) has a tilt angle with
counter-cl ckwise is 45 degree. Then tighten the
screw. .
o
After finish installing the feed dog lift cam, then
install the feed cam. Take the feed dog lift cam as a
reference, when the needle bar at its highest position,
the screw (A) has a tilt angle with counter-clockwise
is 30 degree. Last tighten the screw (B) .
After finish installing the feed dog lift cam, then
install the feed cam. Take the feed dog lift cam as a
reference, when the needle bar at its highest position,
the screw (A) has a tilt angle with counter-clockwise
is 30 degree. Last tighten the screw (B) .
25. Feed timing adjustment (Fig. 24,25,26)
A
B
Screw
A
BC

C
Ascending
Down
L
A
B
-11-
During the sewing, the center gauge (L) between
the walking foot sliding block and its shaft can be
adjusted according to the differences of the friction
coefficients of the friction coefficients of materials
and the sewing process. .
During the sewing, the center gauge (L) between
the walking foot sliding block and its shaft can be
adjusted according to the differences of the friction
coefficients of the friction coefficients of materials
and the sewing process. .
Method:
Increase L- the upper feed amount enlarged
Reduce L- the upper feed amount shortened
Method:
Increase L- the upper feed amount enlarged
Reduce L- the upper feed amount shortened
Clean the feed dog, the rotating hook and bobbin
case according to the machine use condition.
(1) Cleaning the feed dog
Remove the needle plate, clean off the dust and lint
in the slit of feed dog (A), then re-install the needle
plate.
(2) Cleaning the rotating hook
Clean off all the dust around the rotation hook (B)
and cleaning the bobbin case with soft cloth.
.
.
.
.
.
Clean the feed dog, the rotating hook and bobbin
case according to the machine use condition. .
(1) Cleaning the feed dog .
Remove the needle plate, clean off the dust and lint
in the slit of feed dog (A), then re-install the needle
plate. .
(2) Cleaning the rotating hook .
Clean off all the dust around the rotation hook (B)
and cleaning the bobbin case with soft cloth. .
In sewing operation, for preventing the walking
foot from striking on the presser foot a proper
clearance (C) of approx. 1.5mm should be maintained
between them. When the clearance is too sm ll or too
big, it is necessary to adjust. Loose rear crank screw
and turn the rock shaft, then the walking foot moves
near the needle bar. When adjusting, be sure to note
the fixed number of the clearance (C).
a
.
In sewing operation, for preventing the walking
foot from striking on the presser foot a proper
clearance (C) of approx. 1.5mm should be maintained
between them. When the clearance is too sm ll or too
big, it is necessary to adjust. Loose rear crank screw
and turn the rock shaft, then the walking foot moves
near the needle bar. When adjusting, be sure to note
the fixed number of the clearance (C). .
a
For special sewing requirements, for example, the
upper layer of materials needs more amounts than the
low layer needs. In this case, adjustment can be done
in the range of above theory for operation. .
For special sewing requirements, for example, the
upper layer of materials needs more amounts than the
low layer needs. In this case, adjustment can be done
in the range of above theory for operation. .
26. Upper feed adjustment (Fig. 27)
28. Periodical cleaning (Fig. 29)
27. Adjusting the clearance between
presser foot and walking foot (Fig. 28)
5
5
6

Parts Manual

No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
1
1
1
1
1
1
2
1
1
1
11
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
2
1
2
1
1
2
2
1
2
4
1
1
1
4
1
1
1
1
6K4-001
8KT4-001
6K4-002
KT4-002
6K4-003
6K4-004
6K2-015
6K4-005
6K1-004
6K4-006
6K4-007
6K1-004
6K4-008
6K4-009
6K4-010
6K4-011
6K4-012
6K4-017
6K4-013
6K4-014
6K4-015
6K4-016
6K4-017
6K4-018
6K4-019
6K4-020
6K4-021
6K4-022
6K4-023
6K1-018
6K4-024
6K4-011
6K4-025
6K4-026
6K4-027
6K4-022
6K4-028
6WF2-023
6WF2-022
6K4-029
6K4-030
6K4-031
6K4-032
6K4-033
6K4-034
6K4-033
6K4-035
6K4-036
6K2-052
6K4-037
6K4-038
6K4-039
8KT4-002
6K4-040
6K4-041
KT-005
6K4-043
6K4-041
Arm
Arm
Bed
Bed
Face plate
Big screw for face plate
Small screw for face plate
Upper thread finger of face plate
Screw for upper thread finger
Lower thread finger of face plate
Retainer ring
Screw for lower thread finger
Thread bracket
Thread cover
Set screw
Screw
Thread tension bracket
Set screw for tension bracket
Thread tension pin
Take-up spring
Adjusting spring
Adjusting plate
Thread tension plate (inner)
Thread releasing plate
Thread releasing pin
Thread tension spring
Thread tension nut
Lower thread finger
Set screw for lower thread finger
Upper thread finger
Set screw for upper lower finger
Thread tension pin
Thread tension plate
Thread tension spring
Thread tension nut
Upper cover plate
Washer
Screw for upper cover plate
Rear cover plate
Screw for rear cover plate
Rubber plug
Needle plate
Screw for needle plate
Right sliding plate
Screw for left sliding plate
Left sliding plate
Springy Lever
Screw for left sliding plate
Thread pin
Bracket for thread pin
Oil cup
Oil cup
Model plate
Model plate
Brand plate
Rivet
Deltoid danger label
Caution Label
Thread spring
Screw
Thread tension plate (exetrior)
TW1-2B
L20TW1-2B
TW1-2B
TW1-2BL20
TW1-2B
TW1-2BL20
Part number Parts name Qt. Remark
-13-
1. Arm and bed

-14-
1
23
45
6
7
8
9
10
11
12
13 14
15
16
17 18
19
9
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36 37
38
39
40 37
38
41 42 43
44
45
46
47
48
49
42
49
50
51
52
53
54
55
56
57
58
59
60
50
51
52
58
61
62
63
64
65
66
6768 69 70
71
72
73
34
2. Thread take-up mechanism

No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
6
6K1-001
6K1-002
6K1-003
6K1-004
6K1-005
6K1-006
6K1-007
6K1-008
6K1-009
6K1-010
6K1-011
6K1-012
6K1-013
6K1-014
6K1-015
6K1-016
6K1-017
6K1-018
6K1-019
6K1-020
6K1-021
6K1-022
6K1-023
6K1-024
6K1-025
6K1-026
6K1-027
6K1-028
8KT1-001
6K1-029
6K1-030
6K1-031
6K1-032
6K1-033
6K1-034
6K1-035
6K1-036
6K1-037
6K1-038
6K1-039
6K1-040
6K1-041
6K1-042
6K1-043
6K1-044
6K1-045
6K1-046
6K1-047
6K1-048
6K1-049
6K1-044
6K1-050
6K1-038
6K1-039
6K1-051
8KT1-001
6K1-052
6K1-053
61K-041
6K1-054
6K1-008
6K1-055
6K1-056
6K1-057
6K1-058
6K1-059
6K1-060
6K1-061
6K1-062
6K1-063
6K1-064
6K1-004
6K1-065
1
1
1
1
1
1
1
1
2
1
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
3
1
1
1
1
3
1
1
3
1
1
1
2
2
6
1
1
1
1
1
1
1
2
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
TW1-2B
TW1-2B
TW1-2BL20
TW1-2BL20
Needle
Needle clamp
Screw
Thread guide
Screw
Needle bar
Upper bushing for needle bar
Lower bushing for needle bar
Bushing screw
Needle bar connector
Set screw
Link for needle bar
Sliding block
Railway for sliding block
Screw
Take-up link
Pin
Set screw for pin
Screw
Take-up lever
Connecting screw
Screw for take-up lever
Take-up crank
Position pole for take-up crank
Screw
Needle bar crank
Set screw
Position screw
Upper shaft
Upper shaft
Front bushing for upper shaft
Screw for front bushing
Rear bushing for upper shaft
Oil pipe
Oil felt
Screw
Upper shaft bevel gear
Screw
Oil cover
Set screw
Screw
Balance Wheel
Screw
Screw
Vertical shaft bevel gear
Screw
Vertical shaft
Upper bushing for vertical shaft
Lower shaft for vertical shaft
Set screw for bushing
Lower bevel gear
Screw
Oil cover for lower bevel gear
Set screw
Screw
Lower shaft
Lower shaft
Front bushing for lower shaft
Rear bushing for lower shaft
Screw
Collar
Screw for collar
Hook assembly
Position hook
Screw
Stopping bracket
Screw
Washer
Stopping frame
Stopping frame shaft
Springy lever
Screw
Stopping springy lever
Screw
Screw for stopping frame shaft
Part number Parts name Qt. Remark
-15-
2. Thread take-up mechanism