Singer 270-37 Manuale utente

Form

21290

(264)

SINGER

Service

Manual

270-37

THE

SINGER

COMPANY

All

Rights

Reserved

under

Inter-Americon

Union

Trademark

THE

SINGER

COMPANY

-fe'.

Printed

In U. S. A.

From the library of: Superior Sewing Machine & Supply LLC

CONTENTS

Page

DESCRIPTION

INSTALLATION

LUBRICATION

OPERATOR

INFORMATION

3-7

MACHINE ADJUSTMENTS 8-25

PARTS

CHART

Page

Adjustment Sequence 8

Adjustments

Underside

Throat

Plate

23-25

Loop Pick-up Finger 24

Reel Holder Position Stop 23

Trimming Knives 23, 24

Description of Mochine 3

General

Characteristics

Feed

Mechanism

Adjustments

14-17

Driving

Gears

Lateral

Linkage 14, 15

Longitudinal Linkage 16, 17

Timing

Lateral

Feed

Timing Longitudinal

Feed

Installation

Knife

Actuating

and

Clamp

Lifting Adjustments 12, 13

Button Clamp Foot Lifter 13

Pull-oft Loop 13

Safety

Devices

Tension

Releaser

Thread Wiper 13

Lubrication

Doily

Care

Needle

Setting

the

Needle.

Stitching

Troubles

INDEX

Page

Sewing Difficulties 7

Sewing Mechanism Adjustments 19, 20

Needle Bar Height 20

Hook Positioning (Longitudinal) 19

Hook Timing 19

Sewing Reel 25

Speed 5

Stop

Motion

Adjustments 9-11

Arm

Shaft

Engaging

Arm

Starting Lever 9

Starting Lever

Arm

Stop 10

Tripping Linkage

Stop

Motion

Broke 18

Threading the Machine 6

Thread

Stripper and

Retracting Adjustments 22

Finger

Plate

Follower 22

Retracting Finger 22

Stripper Finger 22

Thread Tension Adjustments 7

Tripping Points Adjustments 18

Winding Linkage Adjustments 20, 21

Pre-T

ension

Reel Driver Tripping Points 21

Thread Clomping Action 20

ALL

WHOM

MAY

CONCERN:

The

improper

placing

renewal

the

Trodemork

SINGER'

or any

other

the

Trademorks

The

Singer Company (all of

which

ore

duly

Registered

Trademarks)

on ony

machine

that

has

been

repaired,

rebuilt,

reconditioned,

altered

any

vroy

whatsoever

outside

aSINGER

factory

or an

authorized

SINGER

agency

forbidden.

From the library of: Superior Sewing Machine & Supply LLC

DESCRIPTION

Machine

270-37

is a single needle, single thread, lockstitch

machine

designed

for

sewing

two and

four

hole buttons on clothing. The

machine

sews a single

row

of stitches parallel to

the

cylinder

when

sewing

two

hole

buttons

and

two

rows

of stitches parallel to the

cylinder

with two right angle cross-over stitches

when

sewing

four

hole buttons.

Automatic in operation, the machine is equipped with a sewing reel which is located inside

the

hook

body.

Thread

wound

on reel

from

upper

thread

supply

during

the Initial needle pene

tration. Then,without a break in thread or interruption

machine

cycle, stitch

formation

begins.

Reel

thread is passed

through

upper

thread

loop

on each successive stitch to

form

aregular

lockstitch. Thus only one thread is required to

form

a complete stitch pattern and no stitch

starting ends of thread are present. At the end of the stitching pattern, thread is

trimmed

and

excess thread is

removed

from

reel and

drawn

away by a suction type air

pump.

GENERAL

CHARACTERISTICS

18 Stitches

...

6parallel, 2cross-over, 6parallel,

4tying.

Rotating

Hook with

Thread

Reel

. . .

makes

two

revolutions

each

revolution

of arm

shaft.

Rotary Hook

Shaft,

, . driven by spiral bevel gear

from

vertical

arm

shaft.

Throat Plate . . . equipped with scissor type trim

ming mechanism for cutting thread at completion of

stitch

pattern.

Button Clomp . . , accommodates 14 to 50 ligne

buttons.

Work

Plate

...

if specified, at additional cost.

Feed

Cam . . . controls operation of button clamp.

Safety Interlock . . . prevents clamp

from

being

lifted when machine is in operation.

Belt

Guard . . . fully

encloses

driving belt and

stop

motion

device.

TENSION

REGULATOR

PRE-TENSION

PULL-OFF

LOOP

THREAD

GUIDE

RING

FACE

PLATE

THROAT

PLATE

ROTATING

HOOK

WITH

REEL

CYLINDER

COVER

BUTTON

CLAMP

ARM

COVER

(SIDE)

BELT

GUARD

COVER

FEED

CAM

From the library of: Superior Sewing Machine & Supply LLC

BELT

GUARD

COVER

HIHGE

PINS

HINGE

PLATES

BRACKET

ADJUSTABLE

YOKES

INSTALLATION

GUSH

ONS

Fig.

Installation

Machine

(Co

Place

machine into

recess

on table top on four

rubber

cushions at corners of drip pan as

shown.

Hinge pins fit into hinge plates at back of

recess

and should not support machine except

when

it is

tilted

back.

Install

blower

unit

accordancewith

instructions

(Form 21207) included in shipping carton.

Attach adjustable yokes to machine levers as

shown in Fig. 4.

Fig.

Attaching

Yokes

Levers

Belt

guard cover

fits

into

bracket

and

encloses

drive and stop

motion

mechanism (see Fig. 3).

From the library of: Superior Sewing Machine & Supply LLC

LUBRICATION

For

best

results,

use

SINGER*

Oil

"Type

D".

"Type

D" Oil Is used when on oil

desired

which will produce a minimum of

stain

fabric.

Doily

Core

Before starting machine, apply a few drops of

oil to each of the holes indicated in Figs. 5 end 6

and

run

machine

for

short

time.

OIL

OIL OIL

OIL

On new

machines

and

machines

Installed

after

several weeks of idleness, needle bar and take-up

linkage should be oiled by hand before using. The

residual lubricant may have congealed or dis

appeared

entirely.

NOTE: Once each year, machine pulley (loose)

should be removed and repacked with ball bearing

lubricant.

OIL

Fig. 5.

Lubricating

the

Machine

eaning

Remove

all

lint

and

abrasive

matter

from

around

hook body and throat plate mechanism

(see

Fig. 6).

Wipe off all

excess

oil which may come in con

tact

with

material

sewn.

Machines not in

use

should be kept well

oiled,

clean, dry and covered.

Check waste collector daily and empty when full.

SPEED

The

maximum

speed

recommended for Machine

270-37 is 1,850 R. P.

WASTE

THREAD

COLLECTOR

CLEAN

THESE

AREAS

OFTEN

OIL

(SMALL

AMOUNT)

Fig. 6. Cleaning

the

Machine

From the library of: Superior Sewing Machine & Supply LLC

NEEDLES

Use

SINGER*

needle

—

Catalog

2173.

Other

needles, determined

size of thread and type of material to be sewn,are available.

LONG

GROOVE

NEEDLE

CLAMPING

SCREW

Fig.

7. Setting

the

Needle

SETTING

THE

NEEDLE

With

machine in

"stop"

position loosen needle

clamping

screw

shown in

Fig.

Insert needle up into needle bar as far as it will

go making certain that the single continuous groove

the

needle

faces

away from the hook (facing

the

operator)

shown.

Securely

tighten

needle

clamping

screw.

THREAD

CUTTER

Stitching

Troubles

Check

needle

often

make

sure

these

defects

are

not

present.

•

Wrong

needle for thread and material in use • - -

cause

of thread

breakage.

• Bent needle, clogged needle eye or dirty needle

groove - - - a cause of skipped

stitches.

THREADING

THE

MACHINE

The correct threading proceedure for

Machine

270-37

is shown in

Fig.

Thread

passes

through needle eye

from

front to

rear.

Draw

thread up into cutter in face plate and

snip thread end off as shown.

Fig. 8. Threading

the

Machine

From the library of: Superior Sewing Machine & Supply LLC

THREAD

TENSION

Needle

Thread

Tension

Tension should be

light as

possible

while

still sufficient to set the stitch correctly in material,

(see

Fig.

9).

regulate,

turn thumb nut at front of

tension

discs

shown in pig. 10.

Fig.

9. EYER-LOK Stitch

Reel

Thread

Tension

When

tension on reel thread has been correctly

adjusted, the required stitch may usually be ob

tained to suit the work in process thereafter by

varying

needle

thread

tension

only.

To regulate, turn adjusting screw

shown

pig.

10 as required.

DECREASE

INCREASE

DECREASE

INCREASE

Fig, 10. Adjusting

the

Tension

SEWING

DIFFICULTIES

WHEN

THREAD

BREAKS

CHECK:

Is machine threaded properly?

needle

correctly

seated

needle

bar?

needle

bent

burred?

thread

suitoble

for

needle

use?

needle

thread

tension

too

tight?

WHEN

THREAD

SNAGS

MACHINE

SKIPS

STITCHES

CHECK:

Is needle

eye

or groove dirty?

needle

bent

burred?

Is needle

size

correct for operation?

thread

suitable

for

material

use?

reel

cose

free

thread

end?

HINTS

FOR

OPERATORS

WHEN

OPERATING

MACHINE

Be sure to

depress

starting pedal firmly.

Make

sure that button is inserted correctly in clamp.

Make sure that

needle

thread is not under clamp at

start

of sewing

cycle.

Do not

depress

clamp lifting pedal until machine goes in

"stop".

Inspect

reel thread

tension

for thread or lint

accumulation.

From the library of: Superior Sewing Machine & Supply LLC

ADJUSTMENTS

1"he

sequence

adjustments

outlined

this

page

should

checked

and

made

the

order

given

ovoid

confusion

and

unnecessary

repetition.

STOP

MOTION

ADJUSTMENTS

Arm

Shaft

1. Adjust for end ploy

B. Starting

Lever

1. Set

clearance

between interlocking arm and

machine pulley

Adjust

arm

stop

C. Engaging arm

1. Adjust to obtain correct

"V"

belt tension

Tripping

Linkage

1. Adjust

rock

shaft support

for

binding

2. Set

clearance

between bell crank and pawl

KNIFE

ACTUATING

AND

CLAMP

LIFTING

ADJUSTMENTS

A. Safety Devices

1. Set

Lifting

Arm Lug

2. Adjust lifting lever pawl to clear engaging

surface

on lifting

lever

3. Set Clamp lifter

stop

Tension

Releaser

Position

tension

regulator

2. Set lifting link

connection

3. Set lifting arm to

release

tension

C. Button Clamp Foot Lifter

Position

lifter

beneath

arm

hook

Thread

Wiper

1. Set wiper support

Position

wiper

wire

Thread

Pull-off

Loop

Adjust

tension

spring

III

FEED

MECHANISM

ADJUSTMENTS

Feed

Driving

Gears

1. Check alignment of timing marks

Eliminate

play in

gears

Feed

Linkage

Adjustment

1. Center and

position

lateral fevd linkage

Increase

decrease

lateral

movement of

feed

bar

3. Center and position longitudinal feed link

age

Increase

decrease

longitudinal move

ment

feed

bar

Feed

Timing

Adjustment

1. Time longitudinal feed movement

Time

lateral

feed

movement

TRIPPING

POINTS

ADJUSTMENT

A. Set timing to

actuate

interlocking arm

STOP

MOTION

BRAKE

ADJUSTMENTS

Obtain

brake

clearance

Adjust

brake

pressure

SEWING

MECHANISM

ADJUSTMENTS

A. Sewing Hook

1. Set longitudinal position

Time

hook

Needle

Bar

1. Set

Needle

Bar

Height

VII

REEL

WINDING

ADJUSTMENTS

A. Winding Linkage

1. Adjust thread clamping action

B. Reel Driver Tripping

Points

1. Set tripping point for

"full

pinch

2. Adjust Extension

for

duration of pinch

Pre-Tension

1. Adjust to aid in reel winding

VIII

THREAD

STRIPPING

AND

RETRACTING

ADJUSTMENTS

A. Finger

Plate

Follower

1. Set to

actuate

stripper finger

B. Stripper

Finger

1. Adjust to

remove

unused reel thread

Retracting

Finger

1. Adjust to pick up reel thread

Tension

Releaser

Re-check

ADJUSTMENTS

UNDER

THROAT

PLATE

Reel

Holder

Position

Stop

B. Trimming

Knives

1. Set movable and

adjustable

knives

Time

knives

3. Adjust knife

pressure

Loop

Pick-up

Finger

Position

operating

lever

2. Set loop pick-up finger

From the library of: Superior Sewing Machine & Supply LLC

STOP

MOTION

ADJUSTMENTS

ARM

SHAFT

CHECK:

There should be a

minimum

of end play in the

arm

shaft

shown In Fig. 11.

SETTING:

Loosen set screw in bushing

shown

in pig.

and lock nut on support screw

shown

in pig, 12.

Pull rear bushing out (toward machine pulley)

by turning support screw in clockwise direction.

Then tighten set screw and lock nut securely.

Check adjustment to

make

sure end play has been

eliminated without binding.

STARTING

LEVER

CHECK:

Depress

starting lever to engage machine in

"run**position.

Turn machine pulley over toward right (looking

from

face plate back) until bell crank pawl moves

into the

"'coast"

position in bell crank

shown

Pig.

13.

this

position, there should be approximately

1/32 inch clearance between high point of

camming

surface on machine pulley and interlocking arm

shown in

Pig.

12.

SETTING:

Loosen lock nut on starting rod and remove hinge

screw shown in

Pig.

11.

Turn swivel on starting rod, (Fig. 11) in or out

one full turn for each 1/32 inch of adjustment re

quired to obtain

clearance

between camming surface

and interlocking arm

shown in Pig. 12.

Replace hinge screw and tighten lock nut on

swivel

securely.

HINGE

SCREW

Fig,

11. Stop Motion Adjustment

(Left

View)

1/32

INCH

LOCK

NUT

SUPPORT

SCREW

BUSHING

ARM

SHAFT

! ^ 1

I / I

5L--

—L—

'''/-"j

l'''U—

n__

iHJ-UihnJi

SET

SCREW

LOCK

NUT

SWIVEL

^.J

Fig. 12. Stop Motion Adjustment (Right View)

PAWL

COAST

POSITION

RUN

POSITION

COAST

POSITION

Fig.

13. Bell Crank in

"Coast"

Position

From the library of: Superior Sewing Machine & Supply LLC

1/32

INCH

ARM

STOP

SCREW

STARTING

LEVER

Fig.

14.

Adjusting

the

Arm Stop

"V"

BELT

1/32

INCH

1/32

INCH

ENGAGING

ARM

PINCH

SCREW

Fig.

15.

Setting

the

Engaging

Arm

STARTING

LEVER

ARM

STOP

CHECK;

Starting lever arm stop, Fig. 14, should limit

dov/nward movement of

starting

lever so

that

bell

crank

has

1/32

inch

clearance

past

"run"

notch

when starting lever is

depressed.

SETTING:

Remove

"V"

belt and turn stop screw to limit

downward movement of

starting

lever arm

required.

Replace

"V"

belt

and

check

adjustment.

ENGAGING

ARM

CHECK:

Engaging arm should be

adjusted

so the

"V"

belt

drops approximately

1/32

inch when machine

moves from

"run"

position to

"stop"

position (See

Fig.

15).

SETTING:

Loosen pinch screw. Fig. 15, and position en

gaging

arm

closer

to or farther from

starting

cop

shown.

Tighten pinch screw securely and check

adjust

ment,

NOTE:

Check

TENSION

"V"

BELT.

Excessive

tightness

will not improve performance of machine

but

MAY

CAUSE

DAMAGE

excessive

wear

machine

parts.

Tension on

"V"

belt may be varied by raising or

lowering motor, but

adjustment

should be made in

connection

with

engaging

arm

adjustment

described

above.

From the library of: Superior Sewing Machine & Supply LLC

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