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20U-105C
Singer 20U-105C User Manual
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14
3.10
Machine
Threading
Figure 1
6
When
threading
the
mac
hine
head,
the
needle
bar
should
be
at
the
highest point of its stroke.
Caution
Switch off the
machine.
Do not operate
the machine
without thread
take-up guard.
Do not operate
the machine
without finger
guard.
Threading
the
mac
hine
in
the
order
shown in the Figure 1
9.
Leave
thread
approximately
4
cm
longer in the needle.
1
2
3
4
7
8
5
6
Z
i
g
z
ag
S
ewi
n
g M
a
c
h
i
n
e
|
In
s
truc
ti
on
M
an
u
a
l
a
n
d
P
a
rts Lis
t
16
18
Table of Contents
Table of Contents
2
Safety Instructions
4
Important Safety Instructions
4
For Safe Operation
5
Product Description and Machine Specification
6
Product Description
6
Machine Specification
7
Motor, Motor Pulley and V-Belt Specifications
7
Relationship between Zigzag Bight and Maximum Speed
7
Oil Reservoir Installation
9
Belt Cover Installation
10
Lubrication
11
Needle and Thread
12
Inserting the Needle
12
Bobbin Case Attachment
13
Bobbin Thread Winding
14
Bobbin Case Threading and Replacement
15
Machine Threading
17
Stitch Length Adjustment
18
Presser Foot Pressure Adjustment
18
Needle Thread Tension Adjustment
19
Thread Take-Up Spring Adjustment
19
Bobbin Thread Tension Adjustment
20
Needle Position Selector
20
Stitch Width Regulator
21
Zigzag Stitch Width Control
21
Needle Bar Frame Clamp Device
22
Straight and Zigzag Stitch Fitting
23
Spool Cap Usage
24
Thread Anti-Spill Net Usage
25
Knee Lifter Installation
25
Fittings for Buttonhole Stitching
28
Fittings for Hem Sewing
28
Fittings for Zipper and Cord Sewing
29
Maintenance
30
Machine Head Cleaning
30
Lubrication
30
Safety Inspection
30
Troubleshooting
31
Parts List
32
Face Plate, Arm Top Cover and Arm Side Cover Components
33
Thread Take-Up, Arm Shaft and Handwheel Components
35
Needle Bar, Presser Bar and Needle Plate Components
37
Zigzag Triangular Cam and Hook Advancing Crank Components
39
Bight Amplitude and Bight L-C-R Position Components
41
Arm Shaft (Upright) and Rotating Hook Drive Shaft Components
43
Hook and Bobbin Case Components
45
Feed Regulating Dial and Feed Reverse Lever Components
47
Feed Mechanism Components
49
Presser Bar Lifter and Thread Tension Components
51
Thread Stand Components
53
Accessories and Attachments
55
Belt Cover Components
57
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Singer 20U-105C Specifications
General
Brand
Singer
Model
20U-105C
Category
Sewing Machine
Language
English
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