SINGER W1577 - Manual (Page 36)

14. TROUBLE CHART
PROBLEM PROBABLE CAUSE
CORRECTION
Breaking lower Thread not wound evenly on the bobbin P.10, P.14
thread or not drawn up correctly
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.15
Incorrect upper threading
P.13
Too much oil on the hook
P.31
Irregular stitches Incorrect size of needle for the material P.15
Upper thread tension too loose
P.18
Incorrect lower tension
P.12
The material not Pattern selection dial not set correctly
P.16
fed correctly
Incorrect feed dog height
P.12
Lint stuck on the feed dog
P.31
The material Upper or lower thread tension too tight P.12, P.18
puckers
Stitch too long for material
P.16
Thread too thick P.15
Incorrect threading of upper or lower thread P.11, P.13
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