Trouble chart – SINGER W221N User Manual

Page 44

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TROUBLE CHART

PROBLEM

PROBABLE CAUSE

CORRECTION

Breaking lower

thread

Thread not wound

evenly

on the bobbin

or not drawn up correctly

P.10, P.9

Lower thread tension too tight

P.12

Lint stuck in the bobbin case and inside
the tension spring

Remove lint
and fluff with a
cleaning brush

Skipping stitches

Needle not fully inserted

P. 7

Needle bent

P. 7

Size or type of needle and thread not
suitable for the material

P. 17

Incorrect upper threading

P. 13

Too fnuch oil on the hook

P. 40

Irregular stitches

Incorrect size of needle for the material

P. 17

Upper thread tension too loose

P. 13

Incorrect lower tension

P. 12

The material not
fed correctly

Pattern selection dial not set correctly

P. 1 8 , 2 2

Lint stuck on the feed dog

P. 39

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