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PROBLEM PROBABLE CAUSE CORRECTION
incorrect s_ze needle, Choose correct s_ze needle for thread and fabNc.
SMpping Stitches Bent or blunt needle, insert new needle.
Incorrect setting of needle. Reset needle.
Tight upper thread tension, Loosen upper thread tension.
Breaking Upper Thread
Starting to stEtch too fast.
improper threading.
Tight upper thread tension.
Incorrect size needle.
Sharp eye m needle.
Nicks or burrs at hole of needle plate.
Start to stitch at a medium speed,
Rethread machine.
Loosen upper thread tension.
Choose correct s_ze needle for thread and tabnc.
Insert new needle.
Replace needle plate, or polish off burrs compfetely.
Improper bobbin threading. Check bobbin threading.
Breaking Bobbin Thread Lint in bobbin holder or hook race, Clean bobbin holder and hook race.
Remove darning plate.
Darning plate In place. Adjust Stitch Length Control.
Stitch Length set at 0. Place both threads back under presser foot before beginning
Fabric not Moving Thread knotted under fabrfc, to stitch.
Push-pull clutch is disengaged. Push in the clutch.
Thread caught m hook race. Disassemble and clean hook race,
Machine Jamming Knocking Noise
Lint m bobbin holder or hook race, Clean bobbin holder and hook race.
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