Singer 141G Series User manual

Integrated Energy Saving
Lockstitch Sewing Machine
Instruction Manual
and Parts List
141G20CE
30CE
SINGER and the Cameo "S" Design are exclusive trademarks of The Singer Company Limited S.à r.l. or its Affiliates.
©2018 The Singer Company Limited S.à r.l. or its Affiliates. All rights reserved.
Direct Drive Motor
20CF (With U.T.T)
30CF (With U.T.T)

Contents
11 Safety Instructions
1.1 1Important Safety Instructions
1.2 2Safe Operation
32 Product Description and Machine Specification
2.1 3Product Description
2.2 4Machine Specification
2.3 4Motor specifications
53 Setup and Adjustment Instructions
3.1 5Table Cut-Out Drawing
3.2 6Oil Reservoir Installation
3.3 7Lubrication
3.4 8Rotating Hook Oil Supply Adjustment
3.5 9Needle Attachment
3.6 9Machine Threading
3.7 10Winding the Bobbin Thread
3.8 11in Case AttachmentBobb
3.9 11Stitch Length Adjustment
3.10 11Thread Tension Adjustment
3.11 12Thread Take-Up Spring Adjustment
3.12 12Thread Take-Up Stroke Adjustment
3.13 13
3.14 13
3.15 13Presser Foot Pressure Adjustment
3.16
3.17
3.18
14Pedal Adjustment
3.19
14Pedal Operation
3.20
3.21
16
Needle to Rotating Hook Relation Adjustment
18
Height andTilt of the Feed Dog
19
Movable and Fixed Knives Position
15
Knee Lifter Height Adjustment
Presser Foot Lifter Adjustment
3.22 Feed Timing Adjustment
20
3.23 Function of One-Touch Switch
20
3.24 Connection of Foot Pedal Switch
Thread Trimmer Adjustment
17

Contents
4
5
21
6
Maintenance
4.1 21Machine Head Cleaning
4.2
4.3
21Lubrication
21Safety Inspection
22Trouble Shooting
25Parts List
6.1
6.2
26Frame and Micellaneous Cover Components
6.3
Arm Shaft and Thread Take-up Lever Components
30
6.4 32 Presser Bar Components
6.5 34 Feed Mechanism Components
6.6 Thread Trimmer Components
6.7
6.8
6.9
46
44
Lubrication Components
6.10
42
28
Needle Bar, Upright Shaft and Rotating Hook Driving Shaft
38
Oil Reservoir Components
40
Machine Accessories
Components
Specific parts for 141G-30CE / CF

Safety Instructions
1.1
Important
Instructions
sureallrelevantsafety specifica-
tions are adequate to specifica-
tions and technical standards in
your country.
The machine should not be run
without its safety devices.
For your safety, goggles must be
used while running the machine.
Turn off or unplug the machine
when the followingsituationsarise:
Passing the thread by the nee-
dle or replacing the bobbin or
looper.
Replacing the needle, presser
foot, throat plate, feed dog and
sliding plate.
When the machine is in mainte-
nance.
When the operator is not run-
ning the machine.
with the eyes or skin, washed the
surface with plenty oficy water
withagenerous amount of cold
water. In case ofingestion, seek
medical help immediately.
should only be performed by
properly trained personnel.
Maintenance and repair on elec-
tric equipment should only be
made by qualified personnel. If
any electric device is damaged,
the machine should be immedi-
ately stopped.
Before starting the machine in full
running,atest must be conducted
to assure that machine and opera-
tor are able to perform the task.
The machine should not be placed
next toasound source as an ultra-
sonic 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 indi-
cations of use should be followed.
Singer will not be held responsible
for any damage caused by unau-
thorized changes in the product.
When using the
machine, basic safety
procedures must
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.
Safety
befollowed. Read
Before running the machine, make
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1
|Instruction Manual and Parts List
·
Please don’t operate when envi-
ronment temperature is above
45°C or below 0°C.
Avoid operating in the area where
humidity is 30% less and 95% more,
also keep away from dew or acid
spray area.
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

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.
gers,
head and clothes far from
wheel, belt andmotor when the ma-
chine is running . Nothin g should be
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.
To avoid accident in case ofasud-
den start of the machine always
turn it off when laying it down, or
remove the belt cover and the belt.
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 ma-
chineis turned o ff.
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 unplug-
ging it.
1.2
Clean the machine periodically.
Safe Operation
CAUTION
Carry the sewing machine with two
persons as the shown in the figure.
Do not hold the handwheel.
Do not put a obstacle thing such as
screwdriver at the location , where
the sewing machine will be placed.
·
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To avoid
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placed near those parts.
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|Instruction Manual and Parts List
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

3|InstructionManual and Parts List
Product Description
and Machine Specification
2.1
Product
Description
Integrated Energy Saving Direct Drive Lockstitch Sewing Machine
Integrated Energy Saving Direct Drive Lockstitch Sewing Machine
141G-20CEA / -30CEA (Without Auto Thread Trimmer)
141G-20CFA / -30CFA (With Auto Thread Trimmer)

2.3
Machine
Specification
Motor
Singer
Model Application
Maximum
Speed
spm
Stitch
Length
mm
Height of
Presser Foot
Hand / Knee
[mm]
Needle
Bar
Stroke
mm
Hook
Type
Electric Needle
Cat. Lubrication
141G-20CEA
141G-30CEA Medium to
heavy
5,000
4,000
Automatic
Standard
35.0
30.7 1955-01
#14
1955-01
#18
Light to
medium
Power
Device
Motor
(Oil pump)
Model
141G-20CEB
141G-20CEA
Power Torque Voltage Frequency
220V
50 / 60 Hz
550W 4.0 Nm
5.0 5.5 / 13.0
·Integrated direct drive servo motor with operation panel
4
2.2
NU / ND
UTT: Under Thread Trimmer
Table1 - Machine Specification
|Instruction Manual and Parts List
141G-30CFA
141G-20CFA 220V
50 / 60 Hz
550W 4.0 Nm
141G-20CFA
141G-30CFA
Medium to
heavy
Light to
medium
5,000
4,000
5.0 5.5 / 13.0
Standard
35.0
30.7
UTT Automatic
1955-01
#14
1955-01
#18
(Oil pump)
220V
220V
7.0
7.0
6.0 / 13.0
6.0 / 13.0
NU / ND: Needle up / Needle down
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine
141G-20CEB
141G-30CEB
141G-20CFB
141G-30CFB 110V
110V
141G-30CEA
220V
220V
110V
110V
110V
110V
141G-30CEB
141G-20CFB
141G-30CFB

Setup and Adjustment instructions
3.1
Table Cut-Out
Drawing
Figure 1
5
Deep 30
Through
Through
Fig.II
Fig. I
Fig.II
Fig.I
Formica
t = 1.0
For 141G-CE / 141G-CF
|Instruction Manual and Parts List
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

6
|Instruction Manual and Parts List
Oil Reservoir
Installation
3.2
3erugiF2erugiF
2
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 and other two
rubber cushion ‘2’ on the hinge side
‘B’.
Then, the oil reservoir ‘3’ is placed.
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 to the cushions ‘
3’ on the
four corners of the table.
1
Figure 5
Figure 4
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

3.3
Lubrication
Before turning the machine on,
fill oil reservoir ‘1’ with sewing
machineoil up to ‘HIGH’mark ‘A’
(Figure6).
When the oil level lowers below
‘LOW’ mark ‘B’, refill the oil reser-
voir with the specified oil.
When you operate the machine af-
ter lubrication, you will see splash-
ing oil through oil sight window ‘2’
if the lubrication is adequate.
Note that the amount of the splash-
ing oil is unrelated to the amount
of the lubricating oil.
Precaution
Figure 6
HIGH
LOW
2
1
B
A
When set-up a new
machine or a machine
after an extended
period of disuse, run
your machine at
3,000 - 3,500 rpm
for about 10 minutes
for the purpose
of break-in.
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|Instruction Manual and Parts List
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

Oil Supply
Adjustment
3.4
How to check the hook oil supply
Unused machine should run idle
for 3 minutes (Moderate intermit-
tent operation).
The amount of oil confirmation
paper must be inserted in the state
when the machine is running.
The confirming time of the oil
amount is 5 seconds (check the
period of time with a watch).
Adjusting the amount of oil sup-
plied to the hook
Sample showing the appropriate
amount of oil
The amount of oil can be adjusted
according to the different sewing
process but it must be a suitable
amount. Otherwise the hook will
generate heat or the sewing mate-
rial 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 7 Figure 8
Figure 9
Machine bed
Bush
1mm
2mm
The amount of oil confirmation paper
Place of oil amount confirming
The amount of oil confirmation paper
Splashing oil from the hook
Minimum
Maximun
Splashing oil from the hook
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.
8
|Instruction Manual and Parts List
Rotating Hook
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

Attachment
3.5
stroke.
Loosen screw '2' and hold needle
'1' with its indented part 'A' facing
exactly to the right in direction 'B'.
Figure 10
Cautions
Figure 11
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.
Machine
Threading
3.6
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'.
When threading the machine, the
est point of its stroke.
shown below.
long in the needle.
1
C
A
B
D
2
1
3
Leave thread approximately 4.0 cm
Threading the machine in the order
needle bar should be at the high-
Turn the hand wheel until the needle
bar reaches the highest point of its
4
8
10
11
9
Needle
2
5
6
7
9
|Instruction Manual and Parts List
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

Bobbin Thread
3.7
1. The bobbin is pushed into the
bobbin winder spindle ‘1’ until it
will go no further.
2. Pass the bobbin thread pulled out
from the spool rested out the right
side of the thread stand following
the order as shown in the figure on
the left. Then, wind clockwise the
end of the bobbin thread on the
bobbin several times. (In case of the
aluminum bobbin, after winding
clockwise the end of the bobbin
thread, wind counterclockwise the
thread coming from the bobbin
thread tension several times to
winding the bobbin thread with
ease.)
3. Press the bobbin winder lever ‘2’
in the direction ‘A’ and start the
sewing machine. The bobbin
rotates in the direction of ‘C’ and
the bobbin thread is wound up. The
bobbin winder spindle ‘1’ automati-
cally as soon as the winding is
finished.
4. Remove the bobbin and cut the
bobbin thread with the thread cut
retainer ‘3’.
5. To adjust the winding amount of
the bobbin thread, loosen the
Cautions
Figure 12
When winding the
bobbin thread, start the
winding in the state
that the thread
between the bobbin
and thread tension disk
'7' is tense.
When winding the
bobbin thread in the
state that sewing is not
performed, remove the
needle thread from the
thread path of thread
take-up and remove
the bobbin from the
hook.
setscrew ‘4’ and move the bobbin
winder adjusting plate ‘5’ to the
direction of ‘A’ (Decrease) or ‘B’
(increase). Then, tighten the
setscrew ‘4’.
6. In case that the bobbin thread is
not wound evenly on the bobbin,
loosen the nut ‘6’ and turn the
bobbin thread tension to adjust the
height of the thread tension disk ‘7’.
• It is the standard that the center of
the bobbin is as high as the center
of the thread tension disk ‘7’.
• Move the position of the thread
tension disk ‘7’ to the direction of
‘A’ as shown in the figure on the left
when the winding amount of the
bobbin thread on the lower part of
the bobbin is excessive and to the
direction orb as shown in the figure
on the left when the winding
amount of the bobbin thread on the
upper part of the bobbin is exces-
sive.
• After the adjustment, tighten the
nut ‘6’.
7. To adjust the tension of the
bobbin winder, turn the thread
tension nut ‘8’.
7
8
7
6
7
A
B
4
21
3
5
BA
10
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Winding the
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

11
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Bobbin Case
Attachment
3.8
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 ‘B’. By
doing so, the thread will pass under
the tension spring and come out
from notch ‘B’.
When pulling the thread ‘C’, the
bobbin should rotate in the direc-
tion of the arrow.
Stitch Length
Adjustment
3.9 ‘2’
direction of the arrow, and align
the desired number to marker dot
‘A’ on the machine arm.
The indication of the dial is in milli-
meters.
When you want to decrease the
stitch length, press reverse lever ‘1’
while turn stitch dial ‘2’ in the direc-
tion of the arrow.
Thread Tension
Adjustment
3.10
Adjusting the needlethread tension
The tension nut ‘1’ can be adjusted
for the needle thread lengths after
trimming.
Turn the nut ‘1’ clockwise (in direc-
tion A), the length of the needle
thread will be shorter.
Turn the nut ‘1’ counter-clockwise
(in direction B), the length of the
needle thread will be longer.
Adjust the tension of needle thread
by tension nut ‘2’ according to
different sewing conditions.
Turn the nut ‘2’ clockwise (in direc-
tion C), the needle thread tension
will be increased.
Turn nut ‘2’ counter-clockwise (in
direction D), the needle thread
tension will be decreased.
Figure 15
Figure 13
Adjusting the bobbin thread tension
Turn the screw ‘3’ clockwise (in
direction E), the bobbin thread
tension will be increased.
Turn the screw ‘3’ counter-
clockwise (in direction F), the
bobbin thread tension will be
decreased.
Figure 14
A
3
E F
C
A
B
C
1
Press revrese lever ‘1’, turn stitch dial
1
B
D
2
2
A
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

3.11
Thread
Adjustment
3.12
Thread
Take-up Stroke
Adjustment
Figure 16
Figure 17
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.
1
A
B
The adjustment of the stroke of the
thread take-up spring
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 in decreased.
Adjusting the pressure of the thread
take-up spring '1'
Loosen setting screw '2' and take
out thread tension assembly.
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 pres-
sure will be decreased.
• Usually, the thread take-up spring
'1' has been properly adjusted
before leaving the factory.
• Only when sewing special clothes
or using special thread is readjust-
ment necessary.
AB
C
1
Take-up Spring
4
3
1
12
|Instruction Manual and Parts List
32
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

Height
Adjustment
3.13
When using the knee lifter, the stan-
dard height of the presser foot is
10mm.
Adjustment
3.14
Caution
When the presser foot lift to over 10
You can adjust the presser foot lift
up to 13mm by turning the knee
lifter adjusting screw '1'.
Turn the presser foot lifter '1' in
direction 'A' to lift the presser foot.
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'.
Presser Foot
Pressure
Adjustment
3.15
Loosen the nut '2' and turn the
presser spring regulator '1' clock-
wise (in direction A), the pressure
of the presser foot will be
increased.
Turn the regulator '1' counter-
clockwise (in direction B), the pres-
sure 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
29~30 mm (4.5 kg).
Figure 18
Figure 19
Figure 20
1
1
A
1
1
2
B
29-30 mm
Presser Foot
Lifter
32
13
|Instruction Manual and Parts List
Knee Lifter
A
B
mm or more, be sure that the needle
bar ‘2’ in its lowest position does not
hit the presser foot ‘3’.
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

14
|Instruction Manual and Parts List
3.16
3.17
Pedal
Adjustment
Figure 21
Installing the connecting rod.
Move the pedal ‘3’ to the right or left
as illustrated by the arrows so that
the motor control lever ‘1’ and
connecting rod ‘2’ are straightened.
Adjusting the pedal angle.
The pedal tilt can be freely adjusted
by changing the length of the con-
necting rod ‘2’.
Loosen adjust screw ‘4’, and adjust
the length of connecting rod ‘2’.
Pedal
Operation
The pedal is operated in the follow-
ing.
Step ‘A’ position
The machine runs at high sewing
speed, when you further depress the
front part of the pedal.
Step ‘B’ position (Neutral)
The machine stops (with its needle
up or down), when you reset the
pedal to its original position.
Step ‘C’ position (Only 141G-20CFA / -30CFA)
The machine trims threads when
you fully depress the back part of
the pedal.
Figure 22
A
B
C
Notes:
1) While the machine is on the auto reverse stitch, if the pedal put it to the neutral position,
the machine will stop after reverse stitches.
2) The machine will perform normal thread trimming even if you depress the back part of
the pedal immediately following high and low speed sewing.
3) The machine will completely perform thread trimming even if you reset the pedal to its
neutral position immediately after the machine started thread trimming function.
4) When the machine stops at the needle down, and if you intend to bring the needle up,
depress the back part of the pedal once.
2
1
3
2
4
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

3.18
Needle to
Rotating
Hook Relation
Adjustment
Figure 23
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.
Precaution
Adjusting the height of the needle
bar
Turn the hand wheel until the needle
bar '2' 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 rotat-
ing hook
Loosen two rotating hook setscrews
and turn the hand wheel 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'(a) , and
make sure the clearance between
the needle and the rotating hook '5'
is 0.04~0.1 mm (b).
1
Center of needle
0.04~0.1mm
5
(a) (b)
15
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Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine

16
|Instruction Manual and Parts List
3.19
Thread
Trimming
Adjustment
Adjustment of the thread trimming
cam position. (Figure 24)
Turn the hand wheel until the needle
bar goes from the bottom up to 5.0
mm.
The thread trimming solenoid ‘4’ is
pressed until the thread trimming
shaft with the roller ‘3’ touches to the
concave of the thread trimming cam
‘1’.
The positioning screw ‘2' is lightly
tightened.
Then releases the thread trimming
solenoid ‘4’ and loosen the screw ‘2’
to adjusting the cam ‘1' position until
the clearance between the cam ‘1’
and thread trimming driving shaft ‘3’
is 0.5 mm.
After it is adjusted, securely tighten
the screw ‘2’.
(Recheck)
When the trimming shaft with the
roller ‘3’ engaged to the concave
of the thread trimming cam ‘1', it is
make sure that the clearance
between the both should be 0.6-
0.8 mm. (Figure 25)
Adjusting the position of the
counter and the moving knives.
(Figure 26)
When the thread trimming shaft
with the roller ‘3’ is at the highest
position in the thread trimming
cam‘1', the front tip of the counter
knife ‘8’ and the edge of the
moving knife ‘7’ should be
engaged by 0.2-0.5 mm.
If it is need to adjust, move the
knife shaft crank rod ‘6’ before the
thread trimming driving shaft with
the roller ‘3’ exceeded the trim-
ming cam ‘1’.
Loosen screw ‘5', and move the
knife shaft crank rod until in front
tip of counter knife ‘8’ and the
edge of moving knife ‘7’ engages
by 0.2-0.5mm.
Then securely tighten the screw
‘5’.
Figure 25 Figure 26
Figure 24
Rotate direction
1
2
7
7
0.2-0.5 mm
87
8
0.6-0.8 mm
0.5 mm
1
3
3
4
6
5
8
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine
(For 141G-xxCFx
Only)

17
|Instruction Manual and Parts List
3.20
Movable
and Fixed
Knives Position
Removing the fixed knife (Figure 27)
Remove the screw ‘1’ and rotating
hook positioner ‘2’.
Remove the screw ‘3’ and the fixed
knife ‘4’.
Lift the presser foot up by the presser
foot lift lever.
plate ’6’.
Removed the screw ‘5’ and the needle
Turn the hand wheel until the needle
bar is at its highest position.
Remove the screws ‘7’ and the mova-
ble knife ‘8’.
* Installation is performed by reversing the above order.
Use the socket spanner ‘9’ to loosen
the nut ‘10', then turn the screw ’11’
until desired pressure of fixed knife.
‘12’.
Figure 29
1
2
7
3
4
6
58
Adjustment
Tilt the machine head until it stops.
Figure 27
Figure 28
Removing the movable knife (Figure 28)
Adjusting pressure of fixed knife
(Figure 29)
plate ’6’.
Removed the screw ‘5’ and the needle
9
11
10
12
Integrated Energy Saving Direct Drive Motor Lockstitch Sewing Machine
(For 141G-xxCFx
Only)