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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