Page 101
English
Section
7
7. TROUBLE CHART
PROBLEM
Breaking lower thread
Skipping stitches
Irregular stitches
The material not fed
correctly
Noisy machine
PROBABLE CAUSE
Thread not wound evenly on the bobbin or not drawn up correctly
Lower thread tension too tight
Lint stuck in the bobbin case and inside the tension spring
Needle not fully inserted
Needle bent or burred
Size or type of needle and thread not suitable for the material
Incorrect upper threading
Too much oil on the machine
Incorrect size of needle for the material
Upper thread tension too loose
Incorrect lower tension
Pattern selection dial not set correctly
Feed teeth are down
Lint stuck on the feed teeth
Check for thread in shuttle, the slightest amount of thread in
shuttle may cause noise or binding, use material like tooth
pick or cotton swab to clean.
CORRECTION
P.33, P.9, 11
P.113, 115
Remove lint and fluff
with a cleaning brush
P.39
P.39
P.43
P.9
P.97
P.43
P.27
P.113, 115
P.49
p.93
P.95
P.95
P.117
