Viking Turissa Manuel de service télécharger pdf (Page 51)

Upper

thread

breaks

A.

The

needle

is

incorrectly

inserted.

B.

The

needle

is

bent

or

blunt.

C.

The

needle

groove

or

eye

has

too

sharp

of

an

edge.

D.

The

needle

and

thread

do

not

correspond.

E.

The

needle

plate

slot

is

damaged

and

has

sharp

edges.

F.

The

upper

thread

is

incorrectly

threaded.

G.

The

upper

thread

tension

is

too

tight.

H.

Poor

quality

thread

-

may

be

knotted.

I.

Thread

is

entangled

on

the

spool

pin.

Lower

thread

breaks

A.

The

bobbin

case

is

incorrectly

inserted.

B.

The

lower

thread

is

incorrectly

threaded.

C.

The

lower

thread

tension

is

too

tight.

D.

The

bobbin

is

wound

too

full.

E.

The

needle

plate

slot

is

damaged

and

has

sharp

edges.

F.

Lint

or

thread

is

wrapped

around

the

shuttle

spindle.

G.

Bobbin

is

bent

or

has

sharp

edges.

Lower

thread

not

brought

up

by

upper

thread

A.

The

needle

is

incorrectly

inserted.

B..

The

needle

is

bent.

C.

Incorrect

needle

system:

use

System

130/705

H.

50

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