Singer 191D-20 User manual

Instruction Manual
and Parts List
High Speed Straight
Lockstitch Sewing Machine
30/30C
70/ 70C
191D
20!20C
~ SINGER "
®Singer is a registered trademark of The Si nger Company Limited or its aff iliated companies.
© 2009 Copyr i ght The Si nger Company Limited
From the library of: Superior Sewing Machine & Supply LLC

Contents
1 Safety Instructions
1.1 Important Safety Instructions
1.2 Safe Operation
2 Product Description and Machine Specification
2.1 Product Description
2.2 Machine Specification
2.3
Motor, Motor Pulley and V-Belt Specifications
3 Setup and
Adjustment Instructions
3.1 Table Cut- Out Drawing
3.2 Oil Reservoir Installation
3.3 Belt Cover and Bobbin Winder Installation
3.4 Lubrication
3.5 ThreadTake-up Lever Oil
Supply Adjustment
3.6 Rotating Hook Oil Supply Adjustment
3.7 Needle Attachment
3.8 Bobbin Case Attachment
3.9 Machine Threading
3.10 Stitch Length Adjustment
3.11 ThreadTension Adjustment
3.12 ThreadTake-Up Spring Adjustment
3.13 Knee Lifter Height Adjustment
3.14 Presser Foot Lifter Adjustment
3.15 Presser Foot Pressure Adjustment
3.16 FeedTiming Adjustment
3.17 Feed Dog Height Adjustment
3.18 Needle to Rotating Hook Relation Adjustment
3.19 Presser Bar Height Adjustment
3.20 ThreadTake- Up Stroke Adjustment
4 Maintenance
4.1 Machine Head Cleaning
4.2 Lubrication
4.3 Safety Inspection
5 Troubleshooting
1
1
2
3
3
4
4
5
5
6
7
8
8
9
10
11
11
12
12
13
14
14
15
16
17
18
19
20
21
21
21
21
22
From the library of: Superior Sewing Machine & Supply LLC

Contents
6 Parts List
6.1 Frame and Cover Components
6.2 Arm Shaft andThreadTake- Up Lever Components
6.3 Needle Bar, Upright Shaft and Rotating Hook Driving Shaft
Components
6.4 Presser Foot Components
6.5 Feed Mechanism Components
6.6 Lubr ication Components
6.7 Oil Reservoir Components
6.8 Belt Cover, Bobbin Winder and Thread Stand Components
6.9 Machine Accessories
23
24
26
28
30
32
34
36
38
40
From the library of: Superior Sewing Machine & Supply LLC

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
1t,
understand that
all basic safety
instructions are
not limited to the
following items.
Readallinstructions,
take care
of this
manual, and use
it
as reference when
necessary.
Safety Instructions
• Before running the machine, make
sure
all relevant safety specifica-
tions are adequate
to specifica-
tions
and technical standards in
your country.
• The machine should not be run
without its safety devices.
• The machine should only be oper-
ated
by properlytrainedpersonnel.
• For your safety, goggles must be
used while running the machine.
• Turn off or unplug the machine
when the
following situationsarise:
• 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.
•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.
• Repair, fitting or maintenance
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, a test must be conducted
to assure that machine and opera-
tor are able to perform the task.
• The machine should not be placed
next to a sound sourceasan 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.
High Speed Straight Lockstitch Sewing Machine ! Instruct ion Manual and Pa rts List 1
From the library of: Superior Sewing Machine & Supply LLC

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,
head and clothes far from
wheel, beltand motor when the ma-
chine is running. Nothing should be
placed nearthose 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.
• To avoid accident in case of a sud-
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-
chine 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 unplug-
ging it.
• Clean the machine periodically.
High Speed Straight Lockstitch Sewing Machine ! Instruction Manual and Parts List 2
From the library of: Superior Sewing Machine & Supply LLC

2.1
Product
Description
Product Description
and Machine Specification
High Speed Straight Lockstitch Sewing Machine
c
High Speed Straight Lockstitch Sewing Machine ! Instruction Manual and Parts List 3
From the library of: Superior Sewing Machine & Supply LLC

2.2
Machine
Specification
Tab le 1 - Mac hin e Specification
Singe r Application Maximum
Model Speed
[spm)
1910- 20
light to
5,000
medium
1910- 20C
1910-30
Medium to
4,500
1910-30C heavy
1910-70 Heavy 3,000
1910-70C
2.3
Motor, Motor
Pulley and V-Belt
Specifications
Stitch Height of Needle Hook Hook NeedleCat. Lubrication
Length Presser Foot Bar Type Origin
[mm) by hand / by Stroke
knee[mm) [mm]
Standard
5.0 5.5/13.0 30.7 Koban/
1955-01 #14
Hirose
Regul
ar
Standard Fully
5.0 5.5/13.0 35.0
1955-01 #18 Automatic
Koban/ Lubrication
Hirose
Standard
7.0 5.5/13.0 35.0 Large Koban/ 1955-01 #21
Hirose
• V2 HP (400W) 2-po le (high speed) clutch motor
• M type v-belt
Table 2 - MachineSpeed vs. Motor Pulley Diameter
MachineSpeed [
spm)
19 1C-20 /20C 191C-30 /30C 191C-70 /70C
5,000
4,500 4,500
4,000
3,500
3,000
2,500
Motor Pulley Diameter [mm]
50Hz 60Hz
125
115
100
90
75
65
105
95
85
75
65
55
Lubrication
Oil
Singer
ucw
type oil
High Speed Straight Lockstitch Sewing Machine !Instruction Manual and Parts List 4
From the library of: Superior Sewing Machine & Supply LLC

3.1
Table Cut-Out
Drawing
Setup and AdjustmentInstructions
~o
+ '
0
~
0
0
N
-
----
,---------------------------------~ ---
115
""
N
c...
LU
LU
Cl
"'
,J
I--"'
00
N
95
+ 1
181 - 0
.....
ai
""
""
~
I
00
~
c...
LU
LU
Cl
N f-
130
"'
LO
0
0
N
---- '---------------------------~------' :---
535
Figure 1
High Speed Straight Lockstitch Sewing Machine ! Instruction Manual and Parts List 5
From the library of: Superior Sewing Machine & Supply LLC

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
~~ are fixed on the extended
portion
of the table by using nail '2',
andthe
other two rubbercushion '3'
on the hinge side '8' are attached by
nail too. Then, the oil reservoir '4' is
placed (Figures 2
and 3).
- ® ®-
Figure 2 Figure 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
Figure 4
to the cushions '3' on the four cor-
ners
of the table (Figures 4 and 5).
Figure 5
High Speed Straight Lockstitch Sewing Machine !Instruction Manual and Parts List 6
From the library of: Superior Sewing Machine & Supply LLC

3.3
Belt Cover and
Bobbin Winder
Installation
Caution
Forsafety, the
belt covershould
be installed.
The leftand
right parts
of the
bobbin winder
shouldbe parallel
to the plate
belt
slot on the
machine table.
Drill four holes J1 ', '8 ', '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 kgfxcm,
and for the screw '5' is about 25
kgfxcm .
Move the back belt cover '2' back-
ward,
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 ', '8'
with screws and washers.
~ 47 ~
1 • 63.5 .1
75 .5
N
CD
Fi gure 6
High Speed Straight Lockstitch Sewing Machine ! Instruct ion M an ual an d Parts List 7
From the library of: Superior Sewing Machine & Supply LLC