Singer 6958001 Fehlerbehebungshandbuch

Service

Manual and

Parts

List

6958001

6958002

6958003

From the library of: Superior Sewing Machine & Supply LLC

Each

6958

machine

is

ide~tified

by

a

~ariety

number

on

a

metal

plate

on

the

machine.

A?PLICATIO~

OF

CATALOG

This

cataloa

applies

speci:=ically

to

the

\'arietics

o-t"

machines

as

listed

below.

Reference

to

directions,

such

as

riaht,

left,

front,

back,

etc.,

are

given

from

the

operator's

position

while

seated

at

the

machine.

Operating

direction

of

handwheel

is

away

from

operator.

VARIETIES

OF

"-ili,.CHI~SS

High

Speed

Single

Curved

~eedle,

Two

Looper,

Three

Thread,

Overseaming

i'lachine,

with

Di

f:

eren

t

ia

l

Feed,

Tr

immina

!\lechani

sm

v;i

th

Spr

ina

Pres

sed

Lower

Knife

and

Automatic

Lubricating

System.

6 9

580

0l

Light

to

medium

duty

machine

for

seaming

light

to

medium

weight

flat,

warp

and

ribbed

knit

fabrics

of

cotton,

wool,

rayon,

silk

or

similar

weight

syn-

thetics

where

long

straight

seams

are

a

primary

requisite.

Seam

specification

504-SSa-1;

standard

seam

·widths

3/32,

1/8

and

5/32

inch

(2.38,

3.17

and

3.97

mm);

stitch

range,

8-2

0

per

inch;

ope

rat

or

adjustable

main

and

differential

feeds.

"\Iaximum

recommended

speed

7

000

R.

P.M.

-

depending

on

stitch

length

and

t:y'}Je

of

operation.

6958002

Light

to

medium

duty

machine,

with

single

row

main

and

differential

feeds

that

are

split

at

the

needle,

for

better

control

v.:hen

sewing

curves

or

irregular

shaped

seams

on

women's

lingerie,

robes

and

similar

seaming

and

trimming

operations

on

light

to

medium

weight

flat,

warp

and

ribbed

knit

fab-

rics

of

cotton,

silk

and

similar

weight

synthetics.

Seam

specification

504-SSa-1;

standard

seam

widths

3/32,

1/8

and

5/32

inch

(2.38,

3.17

and

3.97

mm);

stitch

range,

8-2

0

per

inch;

operator

adjustable

main

and

differential

feeds.

Maxi-

mum

recommended

speed

7

000

R.

P.

:vr.

-

depending

on

stitch

length

and

type

of

operation.

6958003

Same

as

6958001

except

medium

to

heavy

duty

machine

for

seam-

ing

light,

medium

or

heavy

v:eight

materials.

Stitch

range,

8-16

per

inch.

=v!aximum

recommended

speed

6500

R.

P.M.

-depending

on

stitch

length

and

type

of

operation.

OILING

CAUTION!

Oil

was

drained

from

machine

when

shipped,

so

reservoir

must

be

filled

before

beginning

to

operate.

Oil

capacity

of

Class

6958

is

eight

ounces.

nse

Sinaer

Tvoe

C

oil

or

eauivalent.

Machine

is

filled

with

oil

at

spring

cap

in

top

cover.

Oil

level

is

checked

at

sight

gauge

on

front

of

machine.

Red

bulb

on

oil

level

indicator

should

show

between

gauge

lines

when

machine

is

stationary.

3

From the library of: Superior Sewing Machine & Supply LLC

OILING

(Continued)

Machine

is

automatically

lubricated.

No

oiling

is

necessary,

other

than

keeping

main

reservoir

filled.

Check

oil

daily

before

the

morning

start;

add

oil

as

required.

The

oil

drain

plug

screw

is

located

at

back

of

machine

near

bottom

edge

of

base.

It

is

a

magnetic

screw

designed

to

accumulate

possible

foreign

materials

which

may

have

entered

the

crank

case.

It

should

be

removed

and

cleaned

periodically.

NEEDLES

Class

695B

machines

use

a

curved

blade

needle.

The

standard

recommended

needle

for

machines

covered

in

this

catalog

is:

Cat.

1431

Light

Set

Point

(Sizes

7

to

23)

Also

available

are:

Cat.

1433

Light"

Ball

Point

(Sizes

7

to

21)

Cat.

1434

Medium

Ball

Point

(Sizes

9

to

18)

Cat.

1436

Heavy

Ball

Point

(Sizes

8

to

16)

CHANGING

NEEDLES

Release

pressure

on

presser

foot

by

turning

presser

foot

release

bushing

(AG,

Fig.

1)

and

swing

presser

arm

(U)

out

of

position.

Turn

handwheel

in

operating

direction

until

needle

is

at

its

lowest

point

of

travel.

Using

hexagonal

socket

wrench

No.

21388

AU,

furnished

with

machine,

loosen

needle

clamp

nut

about

1I4

turn.

Again

turn

handwheel

until

needle

is

at

high

position;

withdraw

needle.

To

replace

needle,

leave

needle

holder

at

high

position

and

with

the

flat

to

the

left,

insert

needle

in

holder

until

it

rests

against

stop

pin.

Keeping

needle

in

this

position,

turn

handwheel

until

holder

is

again

at

its

low

point

of

travel;

then

tighten

nut.

Return

presser

arm

(U)

to

position;

relock

presser

foot

release

bushing

(AG

).

THREAD

STAND

After

thread

comes

from

cones

on

cone

support

(A.

Fig.

1 ),

it

is

brought

up

through

back

hole

of

thread

eyelet

(B),

then

down

through

the

front

hole

of

thread

eyelet.

is

threaded

through

the

upper

holes

of

tension

thread

guide

(C)

from

front

to

back

and

then

through

the

lower

holes

from

back

to

front.

It

should

be

noted

that

the

lower

looper

thread

is

threaded

through

the

tension

thread

guide

(C),

first

through

the

upper

hole

back

to

front,

second

through

the

middle

hole

front

to

back

and

third

through

the

lower

hole

back

to

front.

All

threads

then

continue

between

the

tension

discs

(J),

through

tension

post

slot

(K)

in

tension

post

(G)

and

on

through

front

thread

guide

(::vi).

4

From the library of: Superior Sewing Machine & Supply LLC

[i

Tension

Thread

Guide

~Front

Thread

Guide

~

lJpper

Looper

Thread

Eyelet

I!JLower

Looper

Thread

Eye

HFrame

Looper

Thread

Guide

m

Presser

A:rm

Fig.

1

5

I

Cone

Support

_o~jl,

___

~\_--l====

Top

Cover

_..._,.Needle

Thread

Eyelet

Upper

Looper

Thread

Tube

Assembly

Needle

~Upper

Looper

m

Lower

Looper

From the library of: Superior Sewing Machine & Supply LLC

THREADING

Only

parts

involved

in

threading

are

shown

in

threading

diagram

(Fig.

1).

Parts

are

placed

in

their

relative

positions

for

clarity.

It

will

simplify

threading

this

machine

to

follow

recommended

sequence

of

threading

lower

looper

first,

upper

looper

second

and

needle

third.

Before

beginning

to

thread,

swing

cloth

plate

open,

turn

handwheel

in

operating

direction

until

needle

(X)

is

at

high

position,

release

pressure

on

presser

foot

by

turning

presser

foot

release

bushing

(AG)

and

swing

presser

arm

(U)

out

of

position.

Be

sure

threads,

as

they

come

from

the

tension

thread

guide

(C)

are

between

tension

discs

(J)

and

in

diagonal

slots

(K)

in

tension

posts

(G).

TO

THREAD

LOWER

LOOPER

Thread

lower

looper

thread

through

right

eyelet

of

front

thread

guide

(l\1).

Then

double

end

of

thread

and

lead

it

through

both

eyes

of

lower

looper

thread

eyelet

(R,

Fig.

1)

from

right

to

left.

Note:

thread

must

pass

in

front

of

looper

thread

pull-off

(AF).

Lead

thread

behind

fabric

guard

(S)

and

through

eyelet

hole

of

frame

looper

thread

guide

(T).

Turn

handwheel

in

operating

direction

until

heel

of

lower

looper

(V)

is

all

the

way

to

the

left;

then

thread

through

both

eyes

from

left

to

right.

Left

eye

of

lower

looper

can

be

threaded

easily

if

tweezers

are

in

left

hand.

TO

THREAD

UPPER

LOOPER

Thread

upper

looper

thread

through

left

eyelet

of

front

thread

guide

(M).

Then

turn

handwheel

until

point

of

upper

looper

(W)

is

all

the

way

left.

Lead

thread

through

auxiliary

looper

thread

eyelet

(P)

from

back

to

front,

then

through

both

eyes

of

upper

looper

thread

eyelet

(N)

from

left

to

right.

Note:

thread

must

pass

in

front

of

looper

thread

pull-off

(AF).

After

pulling

up

upper

looper

thread

tube

assembly

(AA),

lead

thread

under

neck

of

top

cover

casting

and

down

through

thread

tube

assembly

(AA).

Pull

thread

out

bottom

of

tube;

push

tube

down,

then

insert

thread

through

upper

looper

eye

from

front

to

back.

CAUTION!

Be

sure

upper

looper

thread

is

under

lower

looper

thread

when

passing

from

tube

assembly

to

upper

looper

eye.

TO

THREAD

THE

NEEDLE

Thread

needle

thread

through

middle

eyelet

of

front

thread

guide

(l\!I).

Then

turn

handwheel

in

operating

direction

until

needle

(X,

Fig.

1)

is

at

its

highest

position.

Insert

needle

thread

from

right

to

left,

through

both

eyes

of

needle

thread

eyelet

(AD),

und2r

neck

of

top

cover

casting;

then

down

through

hole

in

top

cover

needle

thread

eyelet

(AC).

Thread

needle

from

front.

THREAD

TENSION

The

amount

of

tension

on

needle

and

looper

threads

is

regulated

by

the

tension

nuts

(D,

Fig.

1).

Tension

on

threads

should

be

only

enough

to

secure

proper

stitch

formation.

6

From the library of: Superior Sewing Machine & Supply LLC

PRESSER

FOOT

PRESSURE

Sufficient

presser

foot

pressure

to

feed

work

uni-

formly

should

be

maintained.

Should

it

be

necessary

to

increase

or

decrease

amount

of

pressure

on

presser

foot,

loosen

lock

nut

(A,

Fig.

2)

and

turn

adjusting

screw

(B).

Adjusting

screw

has

a

right

hand

thread

so

tighten-

ing

increases

pressure,

loosening

decreases

pressure.

When

pressure

adjusting

screw

(B)

has

been

properly

set,

tighten

lock

nut

(A).

With

presser

foot

resting

on

throat

plate,

position

lockin~

nut

(C)

so

that

its

under

surface

is

approximately

1j32

inch

to

1/16

inch

from

the

top

surface

of

adjusting

screw

(B).

Set

cap

(D)

against

locking

nut

(C).

Fig.

2

ASSEMBLING

AND

ADJUSTING

SEWING

PARTS

Before

assembling

and

adjusting

sewing

parts,

remove

cloth

plate,

fabric

guard,

chip

guard,

upper

knife

assembly,

lower

knife

holder

assembly,

then

follow

this

suggested

sequence:

SETTING

THE

NEEDLE

Fig.

3

With

throat

plate

assembled

in

position,

needle

should

center

in

the

front

end

of

needle

slot.

When

needle

is

at

high

position,

needle

point

should

be

set

1/2

inch

above

throat

plate

(A,

Fig.

3).

To

align

needle

or

set

the

height

above

the

throat

plate,

move

needle

driving

arm

(B,

Fig.

3)

by

loosening

clamp

screw

(C).

Remove

throat

plate.

If

needle

thread

cam

pull-off

(A,

Fig.

4)

overlaps

looper

thread

pull-off

(B),

separate

by

moving

looper

thread

pull-off

back.

When

re-

tightening

looper

pull-off

screw,

be

sure

to

take

up

end

play

in

needle

driving

arm.

At

this

point,

insert

lower

looper

(A,

Fig.

5)

into

bar

(B).

With

lower

looper

at

left

end

of

its

stroke,

set

looper

point

1/8

inch

from

center

of

needle

(Fig.

5),

using

loopergaugeNo.

21225-1/8.

Do

not

have

lower

looper

deflecting

needle.

Tighten

nut

(C).

Now

assemble

differential

(front)

feed

dog.

SETTING

THE

REAR

NEEDLE

GUARD

Fig.

4

Set

rear

needle

guard

(A,

Fig.

6)

as

high

as

possible,

without

interfering

with

either

lower

looper

or

movement

of

lower

knife

holder,

but

still

in

position

to

deflect

needle

forward

.

002-.

004

inch.

Screw

(B)

is

used

to

set

rear

needle

guard.

Make

sure

there

is

no

interference

between

rear

needle

guard

and

lower

looper.

7

From the library of: Superior Sewing Machine & Supply LLC

SETTING

THE

LOWER

LOOPER

Now

finish

lower

looper

adjustment.

As

lower

looper

moves

to

the

right,

its

point

should

be

set

into

the

needle

scarf

(A,

Fig.

7)

until

the

needle

springs

forward

from

rear

guard

surface

another

.

00

2-.

004

inch.

SETTING

THE

FRONT

NEEDLE

GUARD

Assemble

front

needle

guard

(C,

Fig.

6).

When

lower

looper

is

springing

needle

off

back-

Fig.

5

guard,

set

front

needle

guard

as

close

as

possi-

ble

to

needle

without

touching.

Screw

(D)

is

used

to

adjust

and

set

front

needle

guard.

After

this

setting

make

sure

there

is

no

inter-

ference

between

needle

guards

and

differential

feed

dog.

SETTING

THE

UPPER

LOOPER

Insert

upper

looper

(A,

Fig.

8)

in

its

holder.

Screw

(B,

Fig.

8)

holds

upper

looper

in

its

holder

and

permits

it

to

be

pushed

in

or

out

or

turned

around

its

shank.

Insert

upper

looper

holder

into

upper

looper

shaft,

if

it

is

not

already

in

place.

Screw

(C,

Fig.

8)

on

clamp

holds

the

upper

looper

holder

in

the

shaft.

Locate

upper

looper

in

its

holder

so

that

the

shank

extends

1 I

32

to

1I

16

inch

beyond

holder

(Fig.

8),

for

6958001

and

002,

l/16

to

3/32

inch

for

6958003.

When

the

upper

looper

is

at

the

right

end

of

its

stroke,

upper

looper

holder

should

be

set

to

position

upper

looper

shank

back

of

vertical

on

6958001

and

002

(Fiq.

8).

NOTE:

On

695B003,

upper

looper

holder

should

be

set

to

position

the

upper

looper

shank

about

verti-

cally.

Be

sure

on

all

styles,

there

is

a

clearance

between

heel

of

looper

and

casting.

By

adjusting

looper

holder

in

or

out

of

upper

looper

shaft

and

by

Fig.

6

turning

the

looper

around

its

shank,

set

upper

looper

Fig.

7

point

to

cross

lower

looper

to

the

left

of

the

10\ver

looper

eye

with.

002

to

.

004

inch

clearance

(Fig.

9).

As

the

upper

looper

moves

toward

the

top

of

its

stroke,

the

heel

of

the

up~e~

loo~er

should

pass

behind

the

lower

looper

head

with

1164

to

1j32

inch

clearance.

Next,

turn

handwheel

until

looper

is

at

the

left

end

of

its

travel;

check

dimensions

of

upper

looper

point

\Vith

respect

to

needle

and

throat

plate

(Fig.

1

0).

If

resetting

is

necessary,

do

it

by

moving

the

upper

looper

holder

(A,

Fig.

10

).

Figure

1 0

represents

the

dimensional

setting

for

6 9

58

0

01

and

o0

2.

For

6958003,

the

settings

are

9/64

and

35164

inch.

For

example,

dimension

31/64

inch

is

increased

by

turning

upper

looper

holder

counterclockwise

lookina

from

left

end

of

machine;

dimension

5/32

inch

is

increased

8

From the library of: Superior Sewing Machine & Supply LLC

SETTING

THE

C?PER

LOOPER

(Continued)

by

pulling

upper

looper

holder

left,

out

o:

upper

looper

shaft.

After

these

changes

are

made,

it

may

be

necessary

to

turn

upper

looper

around

its

shank

slightly

to

maintain

the

condition

shown

in

Fig.

9.

v.-hen

the

correct

setting

is

obtained,

it

can

be

checked

quickly

2s

fo~lov:s:

As

upper

looper

is

moving

to

the

right,

when

upper

looper

eye

centers

on

the

needle,

bottom

of

the

needle

eye

should

be

about

level

with

top

surface

of

upper

looper

(Fig.

11)

for

695B00l

and

002.

For

695B003,

the

eyes

of

the

upper

looper

and

needle

should

align

exactly.

Check

setting

to

avoid

interference

between

upper

loop-

er

and

needle

on

needle

downstroke.

If

needle

rubs

the

back

of

upper

looper,

pull

looper

out

of

its

holder

slightly

and

rotate

looper

a

short

distance

counterclockwise,

looking

from

left

end

of

machine.

Reset

to

maintain

dimensions

of

Figs.

9,

10,

11.

SETTING

THE

FEED

DOGS

Fig.

8

Set

all

three

feed

dogs

(A,

B,

C,

Fig.

12)

so

the

top

surfaces

of

teeth

all

lay

in

the

same

plane.

This

can

be

checked

by

sighting

across

teeth

with

a

straight

edge.

Now

assemble

throat

plate.

Feed

dogs

should

now

be

leveled

with

throat

plate

surface

by

rotating

feed

tilting

adjusting

(D).

This

raises

or

lowers

the

back

end

of

both

feed

bars

at

the

same

time.

The

feed

dogs

should

be

set

level

at

the

time

teeth

first

appear

above

the

throat

plate.

Screw

(E)

locks

feed

tilting

adjusting

in

place.

Before

tightening

screw

(E),

press

tilting

adjusting

(D)

to

the

right

to

thrust

against

feed

bar

thrust

washer

(F).

Now

set

feed

dogs

so

that

teeth

rise

about

3/64

inch

above

throat

plate.

Fig.

9

Main

feed

drive

eccentric

ferrule

(G,

Fig.

12)

adjusts

the

position

of

main

and

chaining

feed

dogs

from

front

to

rear

by

turning

the

eccentric

to

maintain

the

proper

clear-

ance

between

the

main

and

differential

feed

dogs

and

the

rear

of

the

throat

plate

slot.

Lock

nut

(H)

to

19-20

inch

lbs.

when

setting

is

made.

SETTING

THE

LOWER

KNIFE

Replace

lower

knife

holder

assembly.

Lower

knife

(A,

Fig.

13)

should

be

set

with

cutting

edge

flush

with

throat

plate

surface.

Adjustments

are

made

with

hexagonal

head

screw

which

holds

lower

knife.

Lower

knife

is

spring

pressed

against

upper

knife,

so

no

lateral

adjustment

is

necessary

when

width

of

trim

is

changed.

Lower

knife

may

be

secured

in

any

position

by

tighten-

ing

screw

(B)

and

locking

nut

(C)

against

support

bracket.

Because

screw

(B)

also

serves

as

latch

for

the

cloth

plate

latch

spring,

it

should

always

be

locked

with

nut

(C)

even

when

screw

is

not

tightened

against

lower

knife

holder.

9

Fig.

10

From the library of: Superior Sewing Machine & Supply LLC

SETTING

THE

UPPER

KNIFE

Replace

upper

knife

assembly.

Clamp

upper

knife

(D,

Fig.

13)

in

position,

setting

nut

(E)

to

hold

clamp

(F)

in

its

most

clockwise

position

against

upper

knife.

At

bottom

of

its

stroke,

front

cutting

edge

of

upper

knife

should

extend

not

1E:3

s

than

1/64

inch

below

cutting

edge

of

lower

knife.

The

chain

guard

(G)

should

be

set

down

against

the

upper

knife

and

slightly

back

from

the

cutting

edge.

After

upper

knife

has

been

set

for

proper

width

of

trim,

Fig.

11

screw

(H)

should

be

tightened

to

lock

upper

knife

holding

block

(J)

in

place.

This

will

simplify

resetting

when

upper

knife

is

replaced.

SETTING

THE

STITCH

LENGTH

The

main

and

differential

feed

controls

are

in-

dependent

of

each

other.

The

right

knurled

knob

marked

"l\IAIN"

is

for

adjusting

the

main

stitch

length.

The

left

hand

knurled

knob

marked

"DIFF"

is

for

adjusting

the

differential

stitch

length.

The

forward

letter

marking

"L"

indicates

the

longest

stitch

length,

while

the

most

rearward

letter

marking

"S"

indicates

the

shortest

stitch

length.

Therefore,

moving

the

indicator

pointers

of

the

main

and

differential

controls

rearward

shortens

the

stitch

length.

To

obtain

the

proper

stitch

length,

Fig.

12

set

the

main

and

differential

feed

dogs

to

have

the

same

feed

travel.

AdJust

accord-

ingly

until

the

desired

stitch

length

is

obtained.

NOTE:

See

Page

19

for

"STITCH

LENGTH

TABLE''.

Fig.

13

After

stitch

length

is

set

and

reverse

differential

feed

is

desired,

turn

the

differential

knob

to

a

shorter

stitch

length

until

the

desired

s

earn

is

obtained.

If

differential

feed

is

desired,

turn

the

differential

knob

to

a

longer

stitch

length

until

the

desired

seam

is

ob-

tained.

As

a

precaution,

after

setting

the-

stitch

length,

check

the

travel

of

the

feed

dogs

to

make

sure

that

there

is

clearance

between

the

throat

plate

slots

and

the

main

and

differential

feed

dogs.

Locking

Main

and

Differential

Feed

Travel

Controls

1.

Differential

feed

is

locked

by

moving

differential

feed

lever

lock

to

differential

indicator

lever

after

proper

stitch

length

is

obtained

and

also

by

locking

indicator

lever

nut.

2.

Main

feed

stitch

length

mechanism

is

locked

by

turning

down

nylok

screw

located

behind

the

throat

plate

support

block

in

the

casting.

10

From the library of: Superior Sewing Machine & Supply LLC

Fig.

14

SETTING

THE

PRESSER

FOOT

Assemble

the

presser

foot

to

presser

arm.

With

needle

in

high

position,

swing

presser

arm

into

sewing

position

and

set

the

presser

foot

to

align

needle

holes

(front

and

back)

and

flat

on

throat

plate.

The

front

edge

of

needle

hole

in

presser

foot

must

be

aligned

with

front

edge

ofneedle

hole

in

throat

plate.

It

is

also

important

that

the

bottom

of

the

presser

foot

be

flat

on

the

throat

plate.

If

necessary,

presser

foot

can

be

realigned

with

throat

plate

slots

by

shifting

the

foot

lifter

lever

shaft

(H,

Fig.

14).

To

move

the

shaft,

loosen

collar

screws

(B,

Fig.

14)

and

clamp

screw

(G)

and

then

shift

the

foot

lifter

lever

shaft

to

the

left

or

right

as

required.

Re-

tighten

collar

screws

and

clamp

screw.

The

foot

lifter

lever

arm

(A,

Fig.

14)

and

the

collar

(B)

secure

the

shaft.

Be

sure

the

presser

arm

does

not

bind

and

rise

when

presser

foot

release

bushing

is

unlocked.

Adjust

lifter

lever

stop

screw

(C)

so

that

presser

foot

can

be

raised

no

higher

than

upper

looper

will

permit;

then

lock

the

nut

(D).

There

should

be

from

1I

16

to

1I8

inch

free

motion

of

foot

lifter

lever

before

the

presser

foot

begins

to

rise.

This

adjustment

should

be

made

with

screw

(E)

and

locked

with

nut

(F).

Re-assemble

the

chip

guard,

fabric

guard

and

cloth

plate.

To

assemble

chip

guard,

turn

handwheel

until

upper

knife

assembly

reaches

its

highest

position.

STARTING

TO

OPERATE

Be

sure

machine

is

threaded

according

to

threading

diagram

(Fig.

1).

With

thread

tensions

light,

set

looper

thread

eyelets

(N

and

R)

about

horizontal

and

in

the

middle

of

their

front

to

back

locations.

Operate

machine

slowly,

without

presser

foot

in

place,

to

make

sure

that

chain

forms

and

moves

off

the

tongue

freely.

Swing

presser

foot

into

position,

insert

material

and

sew

slowly.

NEEDLE

THREAD

CONTROL

While

sewing

on

material,

check

needle

thread

control

as

follows:

Usually

all

needle

thread

is

drawn

on

needle

downstroke.

At

top

of

needle

stroke,

thread

should

be

just

tight

enough

to

feed

chain

off

stitch

tongue.

Stitch

tends

to

pull

down

slightly

if

excessive

thread

is

pulled

on

the

upstroke.

With

needle

at

bottom

of

stroke,

posi-

tion

needle

thread

eyelet

(AD,

Fig.

1)

so

that

needle

thread

cam

pull-off

(AE)

just

contacts

needle

thread.

It

is

desirable

to

adjust

the

needle

thread

pull-off

eyelet

well-forward

(toward

the

operator)

to

delay,

slightly,

the

tightening

of

the

needle

thread.

11

From the library of: Superior Sewing Machine & Supply LLC

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