Singer 20U-109, 20E-910 User Manual
Instruction Manual
and Parts List
Zigzag Sewing Machine
20
20
109 / 109C
112 / 112C
309
U
910
E
SINGER and the Cameo "S" Design are exclusive trademarks of The Singer Company Limited S.à r.l. or its Affiliates.
©2011 The Singer Company Limited S.à r.l. or its Affiliates. All rights reserved.
Contents
1 Safety Instructions 1
1.1 Important Safety Instructions 1
1.2 For Safe Operation 2
2 Product Description and Machine Specification 3
2.1 Product Description 3
2.2 Machine Specification 4
2.3 Motor, Motor Pulley and V-Belt Specifications 5
2.4 Relationship between Zigzag Bight and Maximum Speed 5
3 Setup and Adjustment Instructions 6
3.1 Table Cut-Out Drawing 6
3.2 7
Oil Reservoir Installation
3.3
Belt Cover Installation
3.4
Operation panel Installation (for 20E-910 only)
3.5
The connecting the connectors to the control box (for 20E-910 only)
3.6
Lubrication
3.7
Needle and Thread
3.8
Inserting the Needle
3.9
Bobbin Case Attachment
3.10
Bobbin Thread Winding
3.11
Bobbin Case Threading and Replacement
Machine Threading
3.12
Stitch Length Adjustment (Except 20E-910)
3.13
Presser Foot Pressure Adjustment
3.14
Needle Thread Tension Adjustment
3.15
Thread Take-up Spring Adjustment
3.16
Bobbin Thread Tension Adjustment
3.17
Needle Position Selector (except 20U-309 and 20E-910)
3.18
Stitch Width Regulator (Except 20E-910)
3.19
Zigzag Stitch Width Control (Except 20E-910)
3.20
Needle Bar Frame Clamp Device
3.21
Straight and Zigzag Stitch Fitting (Except 20E-910)
3.22
Spool Cap Usage
3.23
Thread Anti-Spill Net Usage
3.24
Knee Lifter Installation
3.25
Fittings for Buttonhole Stitching
3.26
Fittings for Hem Sewing
3.27
3.28
8
8
9
10
11
11
12
13
14
16
17
17
18
18
19
19
20
20
21
22
23
24
24
27
27
28Fittings for Zipper and Cord Sewing
Contents
4
Maintenance 29
4.1 Machine Head Cleaning 29
4.2
Lubrication 29
Safety Inspection 29
4.3
Troubleshooting 30
5
Parts List 31
6
6.1
Face Plate, Arm Top Cover and Arm Side Cover Components 32
Thread Take-up, Arm Shaft and Handwheel Components 34
6.2
6.3
Needle Bar, Presser Bar and Needle Plate Components
6.4 Zigzag Triangular Cam and Hook Advancing Crank Components 38
6.5 Bight Amplitude, Bight and L-C-R Position Components 40
6.6 Arm Shaft (upright) and Rotating Hook Drive Shaft Components 42
6.7 Hook and Bobbin Case Components 44
6.8 Feed Regulating Dial and Feed Reverse Lever Components 46
6.9 Feed Mechanism Components 48
Presser Bar Lifter and Thread Tension Components 50
6.10
Feed Mechanism Components for 20E-910 only 52
6.11
6.12 Needle Bar Vibration Components for 20E-910 only 54
6.13
Control system components for 20E-910 only 55
6.14 Thread Stand Components 56
6.15 Accessories and Attachments 58
6.16 Belt Cover Components and Extra Parts 60
36
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.
Zigzag Sewing Machine | Instruction Manual and Parts List
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1.2
For 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.
Zigzag Sewing Machine | Instruction Manual and Parts List
2
2.1
Product
Description
Product Description
and Machine Specification
Zigzag Sewing Machine
20U series
20E
Zigzag Sewing Machine | Instruction Manual and Parts List
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2.2
Machine
Specification
Table 1 – Machine Specification
Singer model
20U-109 / 109C 20U-112 / 112C 20U-309 20E-910
For sewing
Stitch type 3-step zigzag Editable, built-in pattern 100
Max. speed[1] 2,500 rpm 2,000 rpm 2,500 rpm 2,000 rpm
Max. stitch bight 9.0 mm 12.0 mm 9.0 mm 9.0 mm
Max. stitch length
Needle bar str oke
Presser bar lift (manual)
Presser bar lift (knee lifter)
Needle catalog (needle system)
Oil
Maximum speed will vary depending on fabric, threads and sewing condition
Plain zigzag (Straight stitch)
Light to medium
3.0 mm
34.8 mm
6.35 mm
9.0 mm
Cat. 1910-05 (135x9)
Singer Oil
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2.3
Motor,
Motor Pulley
and V-Belt
Specifications
1/3 HP (250W) 4-pole (low speed) clutch motor
M type v-belt
Table 2 – Machine Speed vs. Motor Pulley Diameter
Machine Speed
[spm]
20U-109 /109C 20U-112 / 112C 20U-309 20E-910 50 Hz 60 Hz
2,500 - 2,500 - 130 105
2,000 2,000 2,000 2,000 105 85
1,800 1,800 1,800 1,800 90 75
1,500 1,500 1,500 1,500 80 65
Motor Pulley Diameter
[mm]
2.4
Relationship
between
Zigzag Bight
and Maximum
Speed
Table 3 - Relationship between Zigzag Bight and Maximum Speed.
Machine Class 20E-910
Zigzag bight 0 ~ 5.0 mm 5.0 ~ 9.0 mm 0 ~ 5.0 mm 5.0 ~ 12.0 mm 0 ~ 9.0 mm
Max. speed 2,500 rpm 2,000 rpm 2,000 rpm 1,800 rpm 2,000 rpm
20U-109 / 109C / 309 20U-112 / 112C
Zigzag Sewing Machine | Instruction Manual and Parts List
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3.1
Table Cut-Out
Drawing
Setup and Adjustment Instructions
This hole for
20E only
Figure 1
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3.2
Oil Reservoir
Installation
The oil reservoir should be fixed on the side of the machine table groove by
using four nails (Figure 2).
25mm
Figure 2
Two rubber seats and two rubber
corners for supporting the head
portion should be fixed on the
extended portion of the table by
Figure 3
Two hinges ‘1’ fit into the hole in the
machine bed, and the machine head
fitted the table hinge's rubber ‘2’,
using nails, and the other two
rubber cushion on the hinge side
should be fixed on grooves by
using nails too (Figure 3).
before the machine head is placed to
the cushions on the four corners of
the table (Figures 3 and 4).
12
1
Figure 4
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The machine belt cover
The motor belt cover
3.3
Belt Cover
Installation
Caution
Switch off the
machine.
Set sewing head
upright again
using both hands.
Danger of crush-
ing between
sewing head and
table top.
For your safety,
do not run the
machine without
the belt cover.
Install the machine belt cover so
that the hand wheel and v-belt
move freely without interference,
and then tighten the screw at this
position (see Figure 5).
Figure 5
Install the motor belt cover so that
motor pulley and v-belt will rotate
freely without interference.
3.4
Operation
Panel
Installation
(for 20E-910
only)
Install the operation panel ’1’ to the
bracket ‘2’ by two screws ‘3’.
1
Figure 6
Then the operation panel with the
bracket is attached into the machine
by setscrew ‘4’.
2
3
4
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Installations of the connecting connector refer on Figure 7.
3.5
The connecting
the connectors
to the control
box
(for 20E-910 only)
Note
Each connector
has the inserting
direction. Check
the direction and
securely insert it.
The sewing
machine fails to
work if the
connectors are
not properly
inserted.
1. Sensor cord connector
2. Feed step motor cord connector
3. Needle vibration step motor cord connector
4. Power supply cord connector
5. Operation panel cord connector
4
5
1
Figure 7
2
3
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3.6
Lubrication
Caution
Switch off the
machine.
Set sewing head
upright again
using both hands.
Danger of crush-
ing between
sewing head and
table top.
For your safety,
do not run the
machine without
the belt cover.
The rotating hook, and the area at
the under of the needle plate.
Turn handwheel over toward you
until oil hole in the rotating hook
appear in sight.
Figure 8
Regularly apply one or two drops of
oil to the oil hole at the rotating
hook (Oiling point at the Figure 8).
Important
When you first
operate your
machine after set
up or after an
extended period
of disuse, oil the
machine and run
your machine at
1,000 to 1,500
spm for about 10
minutes for the
purpose of
bread-in.
Remove the face plate and the top
cover.
Apply sufficient oil to all oil felt and
indicate with oiling points shown in
Figure 9
B
B
Apply a small amount of grease to
gear teeth indicated at the 'B'.
Keep the oil saturated with the oil
reservoir felt ‘A’ at the under of the
top cover.
A
B
Figure 9
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3.7
Needle and
Thread
Selection of the proper needle
depends not only on the machine
model, but also on the material and
thread used. For selection of proper
needle and thread sizes to be used
on the various machine models
please refer to the table below.
Caution
The power
supply should
be cut off
before attach-
ing the needle.
3.8
Inserting
the Needle
Caution
Table 4 - Needle and Thread
Model
Application
Max. thread size (Nm)-
Synthetic*
Needle size (1/100mm) 10 (60) 12 ~ 16 (80 ~ 100) 18 ~ 19 (110 ~ 120)
Needle catalog
(Needle system)
* or an equivalent size of other types of thread
Use needle Cat. No. 1910-05 needle
system (135x9) only.
Raise needle bar to its highest
position by turning handwheel
toward you.
Loosen needle set screw ‘1’ (see
20U-109 / 109C / 112 / 112C / 309, 20E-910
Light weight
materials
120 60 30
Medium weight
materials
1910-05 (135x9)
Figure 10). Insert the needle in the
needle bar and push it up as far as it
will go.
Make sure its long groove faces
toward the front. Tighten needle set
screw ‘1’ securely.
Mid-heavy weight
materials
Switch off the
machine.
Do not operate
the machine
without the
finger guard ‘2’
(see Figure 10)
1
2
Figure 10
Zigzag Sewing Machine | Instruction Manual and Parts List
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Follow as shown in Figure 11.
3.9
Bobbin Case
Attachment
Caution
Switch off the
machine.
Do not operate
the machine
with throat
plate left open.
1. Open bed slide.
2. Raise latch ‘1’.
3. Lift out bobbin case ‘2’.
1
2
Figure 11
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3.10
Bobbin
Thread
Winding
Caution
Do not guide or
hold thread
when winding
the bobbin.
Stop motion of needle by loosening
stop-motion screw ‘1’. Hold handwheel with left hand and turn stopmotion screw toward you with right
hand. (See Figure 12).
Place bobbin on bobbin winder
spindle ‘3’ and pushing it on as far
as it will go.
‘1’ adjustment.
1
Figure 12
‘+’ direction: Increase tension
‘-‘ direction: Decrease tension
Push latch ‘2’ in the direction indicated by arrow ‘A’, then start the
machine.
Bobbin winder spindle ‘3’ is rotate
in the direction indicated by arrow
‘B’.
To adjust the amount of thread on
bobbin, loosen screw ‘4’ on latch ‘2’
and swing the latch ‘2’ away from
you or toward you, as required.
For more thread on bobbin,
swing latch ‘2’ away from you.
For less thread on bobbin,
swing latch ‘2’ toward you.
If thread winds unevenly on bobbin,
loosen screw ‘5’ and move pretension ‘1’ up or down, as required,
and tighten screw ‘5’.
Threading the pre-tension for bobbin winding
3
2
A
B
4
1
5
Figure 13
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3.11
Bobbin Case
Threading and
Replacement
Hold bobbin case so that bobbin
rotates in the direction of the arrow,
and put bobbin in the bobbin case.
(Figure 14)
Note
When straight
stitching, a
better result
can be obtained
if bobbin thread
is not threaded
through bobbin
case thread
guide ‘3’ of
Figure 17.
Put thread into notch ’1’, and pull it
under tension spring ‘2’ (Figure 15)
Pull thread out from slot ‘2’ on end
of spring ‘1’, and pass it through
bobbin case thread guide ‘3’.
Leave thread approximately 4
inches longer from in the bobbin
case. (Figure 16 and 17)
Figure 14
1
2
Figure 15
1
3
2
Figure 16 Figure 17
Zigzag Sewing Machine | Instruction Manual and Parts List
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3.11
Bobbin Case
Threading and
Replacement
Caution
Switch off the
machine.
Do not run
machine without closing bed
side. Danger of
injury!
Hold bobbin case by latch ‘1’ and
place it on spindle of bobbin case
holder ‘2’ so that position finger ‘3’
enters notch ‘4’ at right of bobbin
case holder (see Figure 18).
Release latch and press bobbin case
firmly in place to assure proper
position. Close bed slide.
3
4
1
Figure 18
2
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3.12
Machine
Threading
When threading the machine head,
the needle bar should be at the
highest point of its stroke.
Threading the machine in the order
shown in the Figure 19.
Leave thread approximately 4 cm
longer in the needle.
Caution
Switch off the
machine.
Do not operate
the machine
without thread
take-up guard.
Do not operate
the machine
without finger
guard.
1
5
6
2
4
3
7
8
Figure 19
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Adjusting the stitch length:
Adjusting the reverse stitch length:
3.13
Stitch Length
Adjustment
(Except
20E-910)
Turn stitch length dial ‘1’ in the
direction of the arrow, and align the
desire number to marker dot ‘A’ on
the machine (Figure 20).
The indication of the stitch length
dial ‘1’ is in millimeters.
A
1
2
Push feed reverse lever ‘2’ down for
reverse feed, and release it for
forward feed.
To adjust the reverse stitch length
turn thumb screw '3' in direction of
the marker ‘+’or‘-' as requested for
the stitch length.
‘+’ direction: To lengthen
‘-‘ direction: To shorten
3
3.14
Presser Foot
Pressure
Adjustment
Figure 20
Loosen the nut ‘2’ and turn the
presser spring regulator ‘1’ clockwise (in direction of the marker ‘+’),
the pressure of the presser foot will
be increased.
1
2
Turn the regulator ‘1’ counter clockwise (in direction of the marker ‘-‘ ),
the pressure of the presser foot will
be decreased.
Tighten the nut ‘2’.
Figure 21
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