Trouble Chart - White 1010 Instruction Manual

21.TROUBLE CHART
PROBLEM
PROBABLE CAUSE
CORRECTION
Breaking lower
Thread not wound evenly on the bobbin P.10, P.15
thread
or not drawn up correctly
Lower thread tension too tight
P.12
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. 7
Needle bent
P. 7
Size or type of needle and thread not
P 1 6
suitable for the material
Incorrect upper threading
P.13
Too much oil on the hook
P.40
Irregular stitches
Incorrect size of needle for the material
P.16
Upper thread tension too loose
P.19
Incorrect lower tension P.12
The material not
Pattern selection dial not set correctly
P.1 7
fed correctly
Incorrect feed dog height
P.12
Lint stuck on the feed dog P.39
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