SINGER W915 - Manual (Page 54)

Page 46
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7. TROUBLE CHART
English
PROBLEM
PROBABLE CAUSE CORRECTION
Breaking bobbin
thread Thread not wound evenly on the bobbin or not drawn up correctly P.8, P.12, P.16
Bobbin thread tension too tight
P.50, 51
Lint stuck in the bobbin case and inside the tension spring
Remove lint and dust
with a cleaning brush
Skipping stitches Needle not fully inserted
P.18
Needle bent
P.18
Size or type of needle and thread not suitable for the fabric P.20
Incorrect upper threading
P.11
Too much oil on the machine
P.45
Irregular stitches Incorrect size of needle for the fabric
P.20
Upper thread tension too loose
P.16
Incorrect bobbin tension
P.50, 51
Fabric not fed correctly Stitch selection dial not set correctly
P.22
Lint stuck on the feed teeth
P.44
Noisy machine
Check for thread in the shuttle, as the slightest amount of
P.44
thread in the shuttle may cause noise or binding. Use cotton
swab to clean.
P.52
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