SINGER W1122 - Manual (Page 50)

21. TROUBLE CHART
PROBLEM PROBABLE CAUSE CORRECTION
Breaking lower Thread not wound evenly on the bobbin P.11, P.16
thread or not drawn up correctly
Lower thread tension too tight P.13
Lint stuck in the bobbin case and inside Remove lint
the tension spring and fluff with a
cleaning brush
Skipping stitches Needle not fully inserted P. 6
Needle bent P. 6
Size or type of needle and thread not
P.17
suitable for the material
Incorrect upper threading P.14
Too much oil on the hook P.46
Irregular stitches Incorrect size of needle for the material P.17
Upper thread tension too loose P.21
Incorrect lower tension P.13
The material not Pattern selection dial not set correctly P.18
fed correctly
Incorrect feed dog height P.13
Lint stuck on the feed dog P.45
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