SINGER 191D-30 User Manual
Instruction Manual
and Parts List
High Speed Straight
Lockstitch Sewing Machine
20 / 20C
30 / 30C
70 / 70C
191D
® Singer is a registered trademark of The Singer Company Limited or its affiliated companies.
© 2009 Copyright The Singer Company Limited
Contents
1 Safety Instructions 1
1.1 Important Safety Instructions 1
1.2 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 4
3 Setup and Adjustment Instructions 5
3.1 Table Cut-Out Drawing 5
3.2 Oil Reservoir Installation 6
3.3 Belt Cover and Bobbin Winder Installation 7
3.4 Lubrication 8
3.5 Thread Take-up Lever Oil Supply Adjustment 8
3.6 Rotating Hook Oil Supply Adjustment 9
3.7 Needle Attachment 10
3.8 Bobbin Case Attachment 11
3.9 Machine Threading 11
3.10 Stitch Length Adjustment 12
3.11 Thread Tension Adjustment 12
3.12 Thread Take-Up Spring Adjustment 13
3.13 Knee Lifter Height Adjustment 14
3.14 Presser Foot Lifter Adjustment 14
3.15 Presser Foot Pressure Adjustment 15
3.16 Feed Timing Adjustment 16
3.17 Feed Dog Height Adjustment 17
3.18 Needle to Rotating Hook Relation Adjustment 18
3.19 Presser Bar Height Adjustment 19
3.20 Thread Take-Up Stroke Adjustment 20
4 Maintenance 21
4.1 Machine Head Cleaning 21
4.2 Lubrication 21
4.3 Safety Inspection 21
5 Troubleshooting 22
Contents
6 Parts List 23
6.1 Frame and Cover Components 24
6.2 Arm Shaft and Thread Take-Up Lever Components 26
6.3 Needle Bar, Upright Shaft and Rotating Hook Driving Shaft
Components
6.4 Presser Foot Components 30
6.5 Feed Mechanism Components 32
6.6 Lubrication Components 34
6.7 Oil Reservoir Components 36
6.8 Belt Cover, Bobbin Winder and Thread Stand Components 38
6.9 Machine Accessories 40
28
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.
High Speed Straight Lockstitch Sewing Machine | Instruction Manual and Parts List
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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.
High Speed Straight Lockstitch Sewing Machine | Instruction Manual and Parts List
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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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2.2
Machine
Specification
Table 1 – Machine Specification
Singer
Model
191D-20
191D-20C
191D-30
191D-30C
191D-70
191D-70C
Application Maximum
Light to
medium
Medium to
heavy
Heavy
2.3
Motor, Motor
Pulley and V-Belt
Specifications
Speed
[spm]
5,000 5.0 5.5/13.0 30.7
4,500 5.0 5.5/13.0 35.0
3,000 7.0 5.5/13.0 35.0 Large
Stitch
Length
[mm]
Height of
Presser Foot
by hand / by
knee [mm]
Needle
Bar
Stroke
[mm]
Hook
Type
Regular
• ½ HP (400W) 2-pole (high speed) clutch motor
• M type v-belt
Table 2 – Machine Speed vs. Motor Pulley Diameter
Machine Speed [spm] Motor Pulley Diameter [mm]
191C-20 / 20C 191C-30 / 30C 191C-70 / 70C 50 Hz 60 Hz
5,000 - - 125 105
4,500 4,500 - 115 95
- 4,000 - 100 85
- 3,500 - 90 75
- - 3,000 75 65
- - 2,500 65 55
Hook
Origin
Standard
Koban/
Hirose
Standard
Koban/
Hirose
Standard
Koban/
Hirose
Needle Cat. Lubrication Lubrication
1955-01 #14
Fully
1955-01 #18
1955-01 #21
Automatic
Lubrication
Oil
Singer “C”
type oil
High Speed Straight Lockstitch Sewing Machine | Instruction Manual and Parts List
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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
200 480
95 206
65
535
65
Ø18
Figure 1
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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 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
23.5mm
to the cushions ‘3’ on the four corners of the table (Figures 4 and 5).
19.5mm
Figure 4 Figure 5
High Speed Straight Lockstitch Sewing Machine | Instruction Manual and Parts List
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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
High Speed Straight Lockstitch Sewing Machine | Instruction Manual and Parts List
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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
High Speed Straight Lockstitch Sewing Machine | Instruction Manual and Parts List
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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
High Speed Straight Lockstitch Sewing Machine | Instruction Manual and Parts List
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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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