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.

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

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

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

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

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

N

-

----

,---------------------------------~

---

115

""

N

c...

LU

Cl

"'

,J

I--"'

00

N

95

+ 1

181

- 0

.....

ai

""

~

I

00

~

c...

LU

Cl

N

f-

130

"'

LO

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

3.4

Lubrication

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.

3.5

ThreadTake-up

Lever

Oil

Supply

Adjustment

Before

turning

the

machine

on,

fill

oil

reservoir

'1'

with

sewing

machine

oil

up

to

'

MA

X'

mark

~~

(Figure

7).

When the

oil

level

lowers

below

'

MIN

'

mark

'8

',

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

thesplash-

ing

oil

is

unrelated

to

the

amount

of

the

lubricating

oil.

Figure 7

Adjust

the

amount

of

oil

supplied

to

the

thread

take-up

and

needle

bar

crank

'2'

by

turning

adjusting

'1' (Figure

B).

The

minimum

amount

of

oil

is

reached

when

marker

dot

~'

is

brought

close to needle

bar

crank

'2'

by

turning

the

adjusting

'1'

in

direction

'8 :

The

maximum

amount

of

oil

is

reached

when

marker

dot

~~

is

brought

to

the

position

just

oppo-

site

from

the needle

bar

crank

by

turning

the

adjusting

'1'

in

di-

rection 'C

'.

Figure 8

High Speed Straight L

oc

k

stitch

Sewing Machine !

Instruct

ion M

an

ual

an

d

Pa

rt

s List 8

From the library of: Superior Sewing Machine & Supply LLC

3.6

Rotating Hook

Oil

Supply

Adjustment

Unusedmachine

should

run idle

for

3

minutes

(Moderate

intermittent

operation).

The

amount

of

oil

confirmationpaper

must

be inserted in the state when

the machine is running (Figure

9).

G)

The am

ount

of

oil conf

ir

mat

i

on

paper

~~

!-----_

I

1 , 70mm , 1

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 pe-

riod

of

time

with

a watch).

0 Place

of

oil

amount

confirm

ing

Machine bed

The

amou

nt

of

oi

l co

nf

ir

mat

i01

Oil reser

voir

Fi

gur

e 9

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

Splashi

ng

oil

fr

om

the

hook

/

I

//

1mn

Minimum

Fi

gure

10

Adjusting the

amount

of

oil sup-

pliedto the hook (Figure

11)

Turning the

oil

adjusting

screw

of

the

hook

shaft bushing on bed

toward

'+' in direction

~

:

the

oil

amount

will

be increased,

and

toward

'-'

in

direction

'8

', 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

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.

Ma

xi

m

um

Fi

gure

11

High

Speed

Straight Lockstitch Sewing Machine !Instruction Manual

and

Parts List 9

From the library of: Superior Sewing Machine & Supply LLC

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

shouldbe

cut

off

before attaching

the needle.

Turn

the

hand

wheel

until

the

nee-

dle

bar

reaches

the

highest

point

of

its

stroke

(Figure

12).

L

oosen

screw

'2'

and

hold

needle

'1'

with

its

indented

part

'A'

facing

exactly

to

the

right

in

direction

'8

'.

Insert

the

needle

in

the

direction

of

the

arrow

until

it

will

go

no

fur-

ther

.

Tighten

the

screw

'2

'.

Make

sure

the

long

groove

'C'

of

the

needle

is

facing

exactly

to

the

left

in

direction

'D

'.

t

Fi

gure

12

High

Sp

eed

Straight Lock

sti

tch Se

wi

ng Machine !

Instruct

ion M

an

ual

an

d

Pa

rt

s List

10

From the library of: Superior Sewing Machine & Supply LLC

3.8

Bobbin Case

Attachment

3.9

Machine

Threading

Fix the

bobbin

into

bobbin

case

with

that

the threadopen

end

is directed

to the leftas observed

from

you.

Pass the

thread

through

thread

slit

J4',

and

pulls

it

in

direction 'C'.

By

doing

so, the thread

will

pass un-

der

the tension

spring

and

come

out

from

notch '8 ' (Figure

13).

When

pulling

the thread 'C', the

bobbin

should

rotate in the direc-

tion

of

the

arrow

.

Fi

g

ure

13

When threading the machine head,

the needle

bar

should

be

at

the

highest

point

of

its stroke.

Thread

the

machine

in

the

order

shown

below

. Leave

thread

ap

-

proximately

4 em

long

in

the needle

(Figure

14).

Fi

g

ure

14

High Speed Straight Lockstitch Sewing Machine !Instruction Manual and Parts List 11

From the library of: Superior Sewing Machine & Supply LLC

3.10

Stitch Length

Adjustment

3.11

ThreadTension

Adjustment

Turn

stitch length dial '1' in the direc-

tion

of

the arrow, and align the

de-

sired number to marker

dot

~,

on

the

machine arm (Figure

15)

.

The

indication

of

the dial is in milli-

meters.

When

you want to decrease the stitch

length, turn stitch length dial '1'while

pressing feed reverse lever '2' in the

direction

of

the arrow.

Fi

gure

15

Adjusting nee

dl

e thre

ad

tension

(Fi

gur

e 16)

Adjust

the tension

of

needle thread

using

tension adjusting

nut

'1' ac-

cording

to

different

sewing

condi-

tions.

Turn the

nut

'1' clockwise (in direc-

tion ~

'),

the tension

will

increase.

Turn the

nut

'1' counterclockwise

(in direction '8

'),

the tension

will

decrease.

Fi

gure

16

Adjusting the bobbin thre

ad

ten-

sion (Figure 17)

Turn

the

tension

adjusting

screw

'2'

clockwise (in direction 'C'), the

bob-

bin

thread

tension

will

increase.

Turn

the

screw

'2'

counterclockwise

(in direction 'D

'),

the

bobbin

thread

tension

will

decrease.

Figure 17

High Speed Straight Lockstitch Sewing Machine !Instruction Manual

and

Parts List

12

From the library of: Superior Sewing Machine & Supply LLC

3.12

Thread

Take-Up Spring

Adjustment

The

adjustment

of

the

stroke

of

the

thread take-up spring (Figure 18)

Loosen setting

screw

'2

'.

Turn the

thread

tension

post

'3'

clockwise (in

direction

~

'),

the

stroke

of

the thr

ead

take-up

spring

will

be

increased.

Turn the

thread

tension

post

'3'

c

ounter

-clockwise (

in

direc

t

ion

'8 '

),

the stroke

of

the

thread

take-up

spring

will

be decreased.

Adjustingthepressure

of

thethread

take-up spring '1' (Figure 19)

Loosen

setting

screw

'2'

and

take

out

thread

tensi

on

assembly

'5'.

Figure

18

Loosen setting screw '4'

and

turn

the tension

post

'3

'.

Turn the tension

post

'3' clockwise

(

in

direction

~

'

),

thepressure

of

the

spring

will

be

increased.

Tu

rn the tension

pos

t '3' coun-

ter

clockwise (in

dire

ct

ion

'8 '), the

pressure

will

be decreased.

•

Usually

, the

thread

take-

up

spr

i

ng

'1' has been

properly

adjusted

be-

fore

leaving the factory.

• O

nl

y wh

en

sewing

special clothes

or

using

special

thread

is readjust-

ment

necessary.

Fi

gure

19

High Speed

Straight

Lockst1tch Sewing

Machine

!

Instruction

Manual and Parts List

13

From the library of: Superior Sewing Machine & Supply LLC

3.13

Knee Lifter

Height

Adjustment

3.14

Presser Foot Lifter

Adjustment

When

using

the

knee lifter, the

standard

height

of

presser

foot

is

10mm.

You

can

adjust

the presser

foot

lift

up

to

13

mm

by

turning

the knee

lifter

adjusting

screw

'1'

(Figure 20).

Fi

gure

20

Turn the presser

foot

lifter

'1'

in

direction

~~

to

lift

the presser

foot

(Figure 22).

The presser

foot

will

go

up

about

5.5

mm

and

stop.

Figure 22

When the presser

foot

lifts

to

over

10

mm,

be

sure

that

the

bottom

end

of

the needle

bar

'2'

in

its

lowest

position

does

not

hit

the presser

foot

'3'

(Figure

21

).

Fi

gure

21

The presser

foot

will

go

back to its

original

position

when

the

lifter

is

turned

down

in

direction

'8'

(Fig-

ure 23).

Figure 23

High Speed Straight Lockstitch Sewing Machine !Instruction Manual

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Parts List

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From the library of: Superior Sewing Machine & Supply LLC

3.15

Presser Foot

Pressure

Adjustment

Loosen the

nut

'2;

and

turn

the

presser

spring

regulator

'1'

clock-

wise (in

direction

J1'),

the pressure

of

the

presser

foot

will

be increased

(Figure 24).

Turn the

regulator

'1'

counter

clock-

wise (in

direction

'8'),

the

pres-

sure

of

the

presser

foot

will

be

de-

creased.

33-36mm

Tighten

nut

'2'.

For

general

sewing

of

the fabrics,

the

standard

height

of

the

presser

spring

regulator

'1'

will

be

around

33-36

mm

(5

kg).

F

ig

ure 24

High Speed Straight Lockstitch Sewing Machine !Instruction Manual

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Parts List

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From the library of: Superior Sewing Machine & Supply LLC

3.16

FeedTiming

Adjustment

Caution

If

the feed

eccentric cam is

moved too

far,

the needle will

be broken.

Loosen screws

'2'

and

'3'

in

feed

eccentric

cam

'1',

move

the feed

eccentric

cam

'1'

in

the

direction

of

the

arrow

or

opposite

direction

of

the arrow,

and

firmly

tighten the

screws

'2'

and

'3'

(Figure 25).

Forthe

standard

adjustment,

adjust

so

that

the

top

surface

of

feed

dog

and

the

top

end

of

needle eyelet

are flush

with

top

surface

of

throat

plate

when

the feed

dog

descends

below

the

throat

plate.

To

advance the feed

timing

in

order

to

prevent

uneven

material

feed,

move

the feed eccentric cam in the

direction

of

the arrow.

To

delay

the feed

timing

in

order

to

increase stitch tightness,

move

the

feed eccentric

cam

in the

direction

from

the arrow.

standard

a

dv

a

nc

ed

,tf!

I

~~

0(~~

Figure 25

High Speed Straight Lockstitch Sewing Machine !

Instruct

ion Manual

and

Pa

rts List

16

From the library of: Superior Sewing Machine & Supply LLC

Singer 191D-20 User manual

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