Kenmore 50 Instructions Manual page 50

WHAT TO DO
PROBLEM PROBABLE CAUSE CORRECTION
Skipping
Stitches
Breaking Upper
Thread
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.
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 for thread and fabric (page 5).
Insert new needle (page 5).
Breaking Bobbin
Thread
Improper bobbin case threading.
Tight bobbin thread tension.
Lint in bobbin case or shuttle.
Check bobbin case threading (page 8).
Loosen bobbin thread tension (page 13).
Clean bobbin case and shuttle (page 20).
Fabric not
Moving
Feed dog down.
Light pressure on presser foot.
Threads knotted under fabric.
Raise feed dog (page 15).
Increase pressure on presser foot (page 10).
Place both threads back under presser foot before
beginning to stitch.
Jiachine Jamming
(Knocking Noise)
Thread caught in shuttle.
Disassemble and clean shuttle (page 20).
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