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WHAT TO DO
PROBLEM PROBABLE CAUSE CORRECTION
Skipping
Stitches
Breaking Upper
Thread
Breaking Bobbin
Thread
Fabric not
Moving
Machine Jamming
(Knocking Noise)
Incorrect 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 shuttie,
Feed dog down,
Light pressure on presser foot,
Threads knotted under fabric.
Choose correct size needle for thread and fabric (page 5
Insert new needle (page 5).
Reset needle (page 5)
Loosen upper thread tension (page 12),
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 fo[ thread and fabde (page 5
Insert new needle (page 5)
Check bobbin case threading (page 8}
Loosen bobbin thread tension (page 13)
Clean bobbin case and shuttle (pages 28, 29)
Raise feed dog (page 15}'
Increase pressure on presser foot (page 10)
Place both threads back under presser foot before
beginning to stitch
Thread caught in shuttle
Disassemble and clean shuttle (,pages 28. 29)
3t