WHATTO
PROBLEM
Skipping
Stitches
Breaking Upper
Thread
Breaking Bobbin
Thread
Fabric not
Movi ng
Machine Jamming
(Knocking Noise)
PROBABLE CAUSE
tncorrect size needle, Bent or blunt needle. Incorrect setting of needle. Tight upper thread tension. Light pressure on presser foot.
Starting to stitch too fast. Improper threading.
Tight upper thread tension. Incorrect size needle.
Sharp eye in needle.
Improper bobbin case threading. Tight bobbin thread tension_ Lint in bobbin case or shuttle.
Feed dog down.
Light pressure on presser foot. Threads
Thread caught m shuttle.
CORRECTION
Choose correct size needle for thread and fabric (page 5). Insert new needle (page 5).
Reset needle (page 5).
Loosen upper thread tension (page 12L
Increase pressure on presser foot (page 10).
Start to stitch at a medium speed.
Rethread machine (page 9).
Loosen upper thread tension (page 12).
Choose correct size needle for thread and fabric (page 5). Insert new needle (page 5).
Check bobbin case threading (page 8).
Loosen bobbin thread tensEon (page 13).
Clean bobbin case and shuttle (page 22 & 23).
Raise feed dog.
Increase pressure on presser foot {page 10).
Place both threads back under presser foot before beginning to stitch.
Disassemble and clean shuttle (page 22 & 23).
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