White 1855 Manuel d'instructions télécharger pdf (Page 32)

TROUBLE-SHOOTING

GUIDE

CAUSE

Machine

is

threoded

incorrectly

2

Tension

is

too

tght

3

Threod

is

too

heovy

for

needle

size

4

Needle

is

inserted

incorrectly

5

Thread

may

he

caught

on

reel

holder

6

Needle

is

damaged

Bobbin

case

is

not

inserted

correctly

Bobbin

case

is

improperly

threaded

Bobbin

tension

is

too

tight

Needle

is

not

inserted

correctly

Needle

is

domaged

Wrong

type

of

needle

is

used

Wrong

foot

is

used

Foot

pressure

is

wrong

Needle

is

damaged

Needle

is

not

inserted

correctly

Fabric

too

heavy/wrong

needle

size

Fabric

is

being

pulled

by

operator

Wrong

sewing

foot

is

used

1

Needle

is

not

threaded

correctly

2

Bobbin

is

not

threaded

correctly

3

Needle/fabric/thread

rotia

is

incorrect

4

Incorrect

tensions

1

Foot

pressure

is

too

heavy

2

Needle

is

too

forge

for

fabric

3

Wrong

stitch

length

is

used

4

Tension

is

too

heavy

1

Thread

is

of

poor

quality

2

Foot

pressure

is

too

light

3

Bobbin

is

threaded

incorrectly

4

Material

is

being

pulled

byaperolor

1

Machine

needs

oil

2

tint

and

oil

residue

have

c&tecied

in

hook

or

on

needle

bar

3.

Inferior

oil

has

been

used

and

gums-up

machine.

4

Needle

is

donaged

5.

Machine

requires

servrcrn9.

___________

_______

REMEDY

Rethreod

machine

and

needle.

2.

Reduce

tension

on

top

(smaller

numbers).

3

Use

larger

needle

4

Reinsert

needle

(flat

side

toword

back).

S

Remove

spool,

rewind

excess

thread

6

Insert

new

needle.

1

Reposition

bobbin.

Check

by

pulling

thread.

If

it

pulls

smoothly

it

is

correct

2.

Check

for

correct

threading

3

Change

bobbin

tension

according

to

instructions.

1

Reinsert

needle

(flat

side

toward

back).

2

Insert

new

needle.

3

Match

needle

size

to

fabric

and

thread

weight.

4

Check

to

see

if

proper

sewing

foot

i

used.

5

Check

foot

pressure

regulation

for

proper

setting.

1.

Insert

new

needle.

2

Reinsert

needle

correctly

(flat

side

toward

back)

3

Match

needle

size

to

thread

&

fabric

weight

4

Do

not

pull

on

cloth.

Check

for

proper

foot

pressure

5

Use

correct

foot

1

Thread

needle

front

to

bock.

2.

Thread

bobbin

according

to

chart.

3.

Match

needle

size

to

thread

S.

fabric

weight

4

Set

correct

tensions.

1

Reduce

foot

pressure

(smaller

numbers)

2.

Use

smaller

needle.

3’

Adjust

length

for

proper

stitches

4

ChECk

tensions.

__________

Use

quality

thread!

Increase

foot

pressure

(larger

numbers)

Thread

bobbin

again

and

check

for

proper

insertion.

Do

not

pull

on

fabric

Let

it

feed

automatically

1.

Oil

according

to

instructio,

9.

Clean

race

and

hook

according

to

instructions.

3

Clean

and

au

again

only

with

fine

sewing

machine

a/

(not

3-in-i

oil)

4.

Replace

needle.

5.

Consult

your

specialist

dealer.

2

3

3

4

5

‘1

3

4

5

CONDITION

Top

thread

breaks

Lower

thread

breaks

Skipped

stitches

Needle

breakage

Stitching

forms

loops

Seams

shrink

or

pucker

Irregular

stitching/feeding

Machine

is

noisy

and

rough

C•4

2.

3.

4

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