3.18 Needle to Rotating Hook Relation Adjustment18
3.19 Presser Bar Height Adjustment19
3.20 Thread Take-Up Stroke Adjustment20
4 Maintenance21
4.1 Machine Head Cleaning21
4.2 Lubrication21
4.3 Safety Inspection21
5 Troubleshooting22
Page 3
Contents
6 Parts List23
6.1 Frame and Cover Components24
6.2 Arm Shaft and Thread Take-Up Lever Components26
6.3 Needle Bar, Upright Shaft and Rotating Hook Driving Shaft
Components
6.4 Presser Foot Components30
6.5 Feed Mechanism Components32
6.6 Lubrication Components34
6.7 Oil Reservoir Components36
6.8 Belt Cover, Bobbin Winder and Thread Stand Components38
6.9 Machine Accessories40
28
Page 4
Safety Instructions
1.1
Important Safety
Instructions
Important
When using the
machine, basic safety
procedures must
be followed. Read
with attention all
instructions before
using the machine.
When using it,
understand that
all basic safety
instructions are
not limited to the
following items.
Read all instructions,
take care of this
manual, and use it
as reference when
necessary.
• Before running the machine, make
sure all relevant safety specifications are adequate to specifications and technical standards in
your country.
• The machine should not be run
without its safety devices.
• The machine should only be operated by properly trained personnel.
• For your safety, goggles must be
used while running the machine.
• Turn off or unplug the machine
when the following situations arise:
• Passing the thread by the needle or replacing the bobbin or
looper.
• Replacing the needle, presser
foot, throat plate, feed dog and
sliding plate.
• When the machine is in maintenance.
• When the operator is not running the machine.
• In case of lubricant oil contact
with the eyes or skin, washed the
surface with plenty of icy water
with a generous amount of cold
water. In case of ingestion, seek
medical help immediately.
• Maintenance and repair on electric equipment should only be
made by qualified personnel. If
any electric device is damaged,
the machine should be immediately stopped.
• Before starting the machine in full
running, a test must be conducted
to assure that machine and operator are able to perform the task.
• The machine should not be placed
next to a sound source as an ultrasonic welding machine and other
equipment.
• The machine should only be run
with the proper electric cable and
connectors, and also the adequate
grounding.
• The machine should only be used
to sew materials as indicated in
its instructions manual, and indications of use should be followed.
Singer will not be held responsible
for any damage caused by unauthorized changes in the product.
• Repair, fitting or maintenance
should only be performed by
properly trained personnel.
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1.2
Safe Operation
• To avoid the risk of electric shock,
do not open the motor wiring box
and do not touch the components
assembled inside the wiring box.
• To avoid injuries do not run the
machine without the belt cover or
in case any other safety device is
removed.
• To avoid possible injuries keep fin-
gers,
wheel, belt and motor when the machine is running. Nothing should be
placed near those parts.
• To avoid injuries never put your
fingers next to the rotating hook
and the thread take-up lever cover
when the machine is running.
• To avoid possible injuries be care-
ful when putting down or lifting
the machine head.
head and clothes far from
• If you machine is equipped with
a servomotor, it does not make
noises while being driven. To avoid
a possible accident caused by an
unexpected start, be sure the machine is turned off.
• To avoid electrical shock, do not
run the machine without proper
grounding.
• To minimize the risk of accidents
or damage in electric components
caused by electric discharge turn
the machine off before unplugging it.
• Clean the machine periodically.
• To avoid accident in case of a sudden start of the machine always
turn it off when laying it down, or
remove the belt cover and the belt.
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2.1
Product
Description
Product Description
and Machine Specification
High Speed Straight Lockstitch Sewing Machine
High Speed Straight Lockstitch Sewing Machine| Instruction Manual and Parts List
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Page 8
3.1
Table Cut-Out
Drawing
Setup and Adjustment Instructions
+ 1
- 0
181
115
2
-R
2
2
.
5
- 0
+ 1
130
2-R18
4
-R
1
2-12.75
0
2-12.75
2-DEEP 23
50
4-R10
2-R20
339.7
68.1
22
2-R30
2-R20
28
2-DEEP 18
4-R1
0
108
2-80
2-DEEP 17
66
33
DEEP 1
Ø
D
EE
P
1
28
130
Ø8.5
Ø
6
1200
2
4
159
59
28
200480
95206
65
535
65
Ø18
Figure 1
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Page 9
3.2
Oil Reservoir
Installation
The oil reservoir should rest on the
four corners of the machine table
groove.
Two rubber seats ‘1’ for supporting
the head portion on the operator
side ‘A’ are fixed on the extended
portion of the table by using nail ‘2’,
and the other two rubber cushion ‘3’
on the hinge side ‘B’ are attached by
nail too. Then, the oil reservoir ‘4’ is
placed (Figures 2 and 3).
Figure 2Figure 3
Two hinges ‘1’ fit into the hole in the
machine bed, and the machine head
fitted the table hinge’s rubber ‘2’,
before the machine head is placed
23.5mm
to the cushions ‘3’ on the four corners of the table (Figures 4 and 5).
19.5mm
Figure 4Figure 5
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3.3
Belt Cover and
Bobbin Winder
Installation
Caution
For safety, the
belt cover should
be installed.
The left and
right parts of the
bobbin winder
should be parallel
to the plate
belt slot on the
machine table.
Drill four holes ‘A’, ‘B’, ‘C’ and ‘D’,
in the machine table for screws
(Figure 6).
Insert support ‘1’ in the threaded
hole in the housing.
Install the front belt cover ‘3’ and
get the hand wheel in the middle of
the cover hole.
Install the back belt cover ‘2’ at
holes ‘C’, ‘D’.
Fix the front belt cover ‘3’ on the
support with screws ‘4’, ‘5’ and
washers ‘6’. The tightening torque
for the screw ‘4’ is about 30 kgf×cm,
and for the screw ‘5’ is about 25
kgf×cm.
Move the back belt cover ‘2’ backward, until its rubber touches the
front belt cover ‘3’, move it again for
0.5~1.0 mm and fix it with screws
and washers.
Fix bobbin winder ‘7’ at hole A’, ‘B’
with screws and washers.
Figure 6
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3.4
Lubrication
Before turning the machine on,
fill oil reservoir ‘1’ with sewing
machine oil up to ‘MAX’ mark ‘A’
(Figure 7).
When you operate the machine after lubrication, you will see splashing oil through oil sight window ‘2’
if the lubrication is adequate.
Precaution
When you first operate
your machine after set
up or after an extended
period of disuse, run
your machine at 2,000
to 2,500 spm for about
10 minutes for the
purpose of bread-in.
When the oil level lowers below
‘MIN’ mark ‘B’, refill the oil reservoir with the specified oil.
Figure 7
Note that the amount of the splashing oil is unrelated to the amount
of the lubricating oil.
3.5
Thread Take-up
Lever Oil Supply
Adjustment
Adjust the amount of oil supplied
to the thread take-up and needle
bar crank ‘2’ by turning adjusting
pin ’1’ (Figure 8).
The minimum amount of oil is
reached when marker dot ‘A’ is
brought close to needle bar crank
‘2’ by turning the adjusting pin ’1’
in direction ’B’.
The maximum amount of oil is
reached when marker dot ‘A’ is
brought to the position just opposite from the needle bar crank by
turning the adjusting pin ’1’ in direction ‘C’.
Figure 8
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3.6
Rotating Hook
Oil Supply
Adjustment
Unused machine should run idle for
3 minutes (Moderate intermittent
operation).
The amount of oil confirmation paper
must be inserted in the state when
the machine is running (Figure 9).
Figure 9
Make sure the oil in the oil reservoir
is within ‘MAX’ and ‘MIN’.
The confirming time of the oil
amount is 5 seconds (check the period of time with a watch).
Sample showing the appropriate
amount of oil (Figure 10)
The amount of oil can be adjusted
according to the different sewing
process but it must be a suitable
amount. Otherwise the hook will
Figure 10
Adjusting the amount of oil supplied to the hook (Figure 11)
Turning the oil adjusting screw of the
hook shaft bushing on bed toward
‘+’ in direction ‘A’, the oil amount
will be increased, and toward ‘-‘ in
direction ‘B’, the oil amount will be
decreased.
After adjustment the machine must
be idling for thirty seconds. It can be
confirmed the state of oil supplied.
generate heat or the sewing material will be contaminated.
Use the amount of oil confirmation
paper for three times to observe the
amount of oil. Adjust the screw until
the mark on the paper unchanged.
Figure 11
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3.7
Needle
Attachment
Caution
Choose a proper
needle size
according to the
count of thread and
the type of sewing
material used.
The power supply
should be cut off
before attaching
the needle.
Turn the hand wheel until the needle bar reaches the highest point
of its stroke (Figure 12).
Loosen screw ‘2’ and hold needle
‘1’ with its indented part ‘A’ facing
exactly to the right in direction ‘B’.
Insert the needle in the direction
of the arrow until it will go no further.
Tighten the screw ‘2’.
Make sure the long groove ‘C’ of
the needle is facing exactly to the
left in direction ‘D’.
Figure 12
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3.8
Bobbin Case
Attachment
Fix the bobbin into bobbin case with
that the thread open end is directed
to the left as observed from you.
Pass the thread through thread slit
‘A’, and pulls it in direction ‘C’. By
doing so, the thread will pass un-
der the tension spring and come
out from notch ‘B’ (Figure 13).
When pulling the thread ‘C’, the
bobbin should rotate in the direction of the arrow.
3.9
Machine
Threading
When threading the machine head,
the needle bar should be at the
highest point of its stroke.
Figure 13
Thread the machine in the order
shown below. Leave thread approximately 4 cm long in the needle
(Figure 14).
Figure 14
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3.10
Stitch Length
Adjustment
Turn stitch length dial ‘1’ in the direction of the arrow, and align the desired number to marker dot ‘A’ on the
machine arm (Figure 15).
The indication of the dial is in millimeters.
Figure 15
When you want to decrease the stitch
length, turn stitch length dial ‘1’ while
pressing feed reverse lever ‘2’ in the
direction of the arrow.
3.11
Thread Tension
Adjustment
Adjusting needle thread tension
(Figure 16)
Adjust the tension of needle thread
using tension adjusting nut ‘1’ according to different sewing conditions.
Turn the nut ‘1’ clockwise (in direction ‘A’), the tension will increase.
Turn the nut ‘1’ counterclockwise
(in direction ‘B’), the tension will
decrease.
Adjusting the bobbin thread tension (Figure 17)
Turn the tension adjusting screw ‘2’
clockwise (in direction ‘C’), the bob-
bin thread tension will increase.
Turn the screw ‘2’ counterclockwise
(in direction ‘D’), the bobbin thread
tension will decrease.
Figure 16Figure 17
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3.12
Thread
Take-Up Spring
Adjustment
The adjustment of the stroke of the
thread take-up spring (Figure 18)
Loosen setting screw ‘2’.
Turn the thread tension post ‘3’
clockwise (in direction ‘A’), the
stroke of the thread take-up spring
will be increased.
Turn the thread tension post ‘3’
counter-clockwise (in direction ‘B’),
the stroke of the thread take-up
spring will be decreased.
Loosen setting screw ‘4’ and turn
the tension post ‘3’.
Turn the tension post ‘3’ clockwise
(in direction ‘A’), the pressure of the
spring will be increased.
Turn the tension post ‘3’ counter clockwise (in direction ‘B’), the
pressure will be decreased.
• Usually, the thread take-up spring
‘1’ has been properly adjusted before leaving the factory.
Adjusting the pressure of the
take-up spring ‘1’ (Figure 19)
Loosen setting screw ‘2’ and take
out thread tension assembly ‘5’.
Figure 18Figure 19
thread
• Only when sewing special clothes
or using special thread is readjustment necessary.
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3.13
Knee Lifter Height
Adjustment
When using the knee lifter, the
standard height of presser foot is
10 mm.
You can adjust the presser foot lift
up to 13 mm by turning the knee
lifter adjusting screw ‘1’ (Figure 20).
Figure 20Figure 21
When the presser foot lifts to over
10 mm, be sure that the bottom end
of the needle bar ‘2’ in its lowest
position does not hit the presser
foot ‘3’ (Figure 21).
3.14
Presser Foot Lifter
Adjustment
Turn the presser foot lifter ‘1’ in
direction ‘A’ to lift the presser foot
(Figure 22).
The presser foot will go up about
5.5 mm and stop.
The presser foot will go back to its
original position when the lifter is
turned down in direction ‘B’ (Figure 23).
Figure 22Figure 23
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3.15
Presser Foot
Pressure
Adjustment
Loosen the nut ’2’, and turn the
presser spring regulator ‘1’ clockwise (in direction ‘A’), the pressure
of the presser foot will be increased
(Figure 24).
Turn the regulator ‘1’ counter clock-
wise (in direction ‘B’), the pressure of the presser foot will be decreased.
Tighten nut ‘2’.
For general sewing of the fabrics,
the standard height of the presser
spring regulator ‘1’ will be around
33~36 mm (5 kg).
33 36
˜
mm
Figure 24
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3.16
Feed Timing
Adjustment
Caution
If the feed
eccentric cam is
moved too far,
the needle will
be broken.
Loosen screws ‘2’ and ‘3’ in feed
eccentric cam ‘1’, move the feed
eccentric cam ‘1’ in the direction
of the arrow or opposite direction
of the arrow, and firmly tighten the
screws ‘2’ and ‘3’ (Figure 25).
For the standard adjustment, adjust
so that the top surface of feed dog
and the top end of needle eyelet
are flush with top surface of throat
plate when the feed dog descends
below the throat plate.
To advance the feed timing in order
to prevent uneven material feed,
move the feed eccentric cam in the
direction of the arrow.
To delay the feed timing in order to
increase stitch tightness, move the
feed eccentric cam in the direction
from the arrow.
Figure 25
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3.17
Feed Dog Height
Adjustment
Caution
If the screw ‘2’
is tightening
too much, the
crank ‘1’ will
be worn out.
When the feed dog ‘A’ is at its high-
est position, the teeth should be
above the top surface of the throat
plate ‘B’ as the below height for
each machine variety (Figure 26).
Loosen screw ‘2’ of crank ‘1’.
Move the feed bar up or down to
make a correct height.
Securely tighten screw ‘2’.
See description below for height
Figure 26
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3.18
Needle to
Rotating
Hook Relation
Adjustment
Precaution
If the clearance
is too small, the
rotating hook points
will wear out, and
too big, it will cause
the skip stitch.
When replacing the
rotating hook, it
should be using the
original one.
Adjusting the height of the needle
bar (Figure 27)
Turn the handwheel until the needle bar has been at the lowest
point, loosen the setscrew ‘1’.
The line ‘A’ on the needle bar ‘2’
align with the bottom end of needle
bar lower bushing ’3’, then securely
tighten the setscrew ‘1’.
Adjusting the position of the rotating hook
Loosen two rotating hook setscrews and turn the handwheel until the line ‘B’ on needle bar align
with the bottom end of needle bar
lower bushing ‘3’.
After the above adjustments steps,
the rotating hook point ‘5’ aligns
with the center of needle ‘4’, and
make sure the clearance between
the needle and the rotating hook
‘5’ is 0.04~0.1 mm.
Figure 27
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3.19
Presser
Bar Height
Adjustment
Loosen setscrew ‘1’ (Figure 28) and
adjust the height of the presser bar.
When the presser foot rises to the
highest, the distance between the
throat plate and the presser foot is
5.5 mm (Figure 29).
Tighten the setscrew ‘1’ after adjustment.
5,5mm
Figure 28Figure 29
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3.20
Thread Take-
Up Stroke
Adjustment
When sewing for heavy weight material, the thread guides ‘1’ move to
the left (in direction ‘A’) to increase
the length of thread pulled out by
the thread take-up.
When sewing light weight material,
the thread guides ‘1’ move to the
right (in direction ‘B’) to decrease
the length of thread pulled out by
the thread take-up.
When marker line ‘C’ on the thread
guide ‘1’ is aligned with the center of
the screw that is standard (Figure 30).
Figure 30
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Page 24
4
4.1
Machine Head
Cleaning
4.2
Lubrication
Maintenance
Clean the machine periodically with
a soft and dry cloth to remove the
excess of dust on the machine head.
Do not use any kind of lacquer thinner to wipe the surface.
If the machine was idle for a long
time, lubricate the machine according to the instructions of topics
3.4 to 3.6.
4.3
Safety
Inspection
Check periodically if all safety devices are properly installed and adjusted.
Check if all fixing and supporting
screws of the machine head are
adequately tighten.
Check if the v-belt is not excessively
worn and if it has the right tension.
Check if there is no overheating in
the electrical motor and check if the
power cord and plug are not damaged.
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Page 25
Troubleshooting
ProblemsPossible CausesPossible Solutions
1.
Needle break
Thread break
Skip stitches
Loosen stitches
Wrinkled stitches
Needle is installed wrong
2.
Wrong needle type or size
3.
Needle is bended
4.
Wrong relation with rotary hook
5.
Needle doesn’t center the needle hole of throat plate
or presser foot
1.
Low quality thread
2.
Thread is thicker than needle hole
3.
Wrong threading
4.
Thread tension is too strong
5.
Needle is installed wrong
6.
Thread stand installed wrong
7.
Thread tension disc, thread guide, needle, hook point
and needle plate are burred
8.
Wrong relation with rotary hook
1.
Wrong relation of needle and hook point
2.
Wrong threading
3.
Needle is installed wrong
4.
Inadequate thread tension
5.
Hook point is damaged
6.
Needle is bended
1.
Wrong threading
2.
Thread is thicker than needle hole
3.
Inadequate thread tension
4.
Wrong setting of needle and hook point
1.
Thread tension is too strong
2.
Take-up spring is too strong
3.
Inadequate pressure of presser foot
4.
Inadequate height of feed dog
5.
Needle is too thick
1.
Install needle correctly
2.
Use proper needle for fabric and thread
3.
Replace needle
4.
Readjust the rotary hook
5.
Readjust the needle plate and presser foot
1.
Change the thread
2.
Use proper needle for fabric and thread
3.
Rethreaded the machine correctly
4.
Readjust the thread tension nut
5.
Install needle correctly
6.
Install thread stand correctly
7.
Grind off, polish or replace by a new parts
8.
Readjust needle and hook point relation
1.
Readjust needle and hook point
2.
Rethread the machine correctly
3.
Installed needle correctly
4.
Readjust the thread tension nut
5.
Replace by a new part
6.
Replace needle
1.
Rethread the machine correctly
2.
Use proper needle for fabric and thread
3.
Readjust the thread tension nut
4.
Readjust needle and hook point
1.
Readjust the thread tension nut
2.
Readjust the take-up spring
3.
Readjust the presser foot pressure
4.
Readjust the feed dog
5.
Use proper needle for fabric and thread
High Speed Straight Lockstitch Sewing Machine| Instruction Manual and Parts List
10818502Bobbin case000001
3410123003Oil wick111111
35101S30005Oil seal screw111111
36101S15006Screw SM3/16 x 28 L=12 111111
3710109002Needle bar slid block guide111111
38101S11008Screw SM11/64x40 L=8222222
20 20C 30 30C 70 70C
Qty.
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Page 33
6.4
Presser Foot
Components
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Page 34
6.4
Presser Foot
Components
No.Part No.Description
110111001Hand lifter111111
2101S11010Screw SM9/64 x 40 L=9.5111111
3O01004Rubber ring111111
41011000200Hand lifter cam assembly111111
51011201100Hand lifter link assembly111111
6H05009Snap ring111111
7101S20001Link screw stud222222
1011600100Presser foot assembly110000
8
1011600400Presser foot assembly001100
1011600800Presser foot assembly000011
9H05009Snap ring333333
1010112010Lifting lever111111
11H05009Snap ring111111
12101S20004Screw111111
13101S20003Screw111111
1410112014Lifting lever link111111
1510126003Connecting rod vertical111111
1610112013Lifting lever connection rod111111
17H05009Snap ring222222
1810127008Tension release return spring111111
1910127003Tension release pin spring111111
2010126003Tension release supporting pin111111
2110112012Tension release plate111111
22101S20002Tension release screw stud111111
23101S30004Presser spring regulator111111
24101S16002Presser spring regulator nut111111
2510102003Presser guide bar111111
10127005Presser spring110000
26
10127018Presser spring001111
2710109003Presser bar guide bracket111111
2810102004Presser bar111111
2910113008Presser bar thread guide111111
30101S15007Screw SM 1/4 x 40 L=8111111
31101S11005Screw SM 9/64 x 40 L=8.5222222
3210103012Presser bar bushing (lower)111111
33101S11009Screw SM9/64 x 40 L=I0.5111111
3410128002Washer111111
3510122034Presser bar oil protection bushing111111
20 20C 30 30C 70 70C
Qty.
High Speed Straight Lockstitch Sewing Machine| Instruction Manual and Parts List