PROBLEM |
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| PROBABLE | CAUSE | |||
| incorrect | size | needle. |
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SMpping Stitches | Bent | or | blunt | needle, |
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incorrect | setting ot | needle. | |||||
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| Tight | upper thread | tension. |
Starting to stitch too fast.
Improper threading.
Tight upper thread tension,
Breaking Upper Threadincorrect size needle.
Sharp eye in needle,
Nicks or burrs at hole of needle piate,
Breaking | Bobbin | Thread |
| Improper | bobbin | threading. | |
| Lint in bobbin holder or hook race. | ||||||
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| Darning | plate in | place. | |
Fabric | not Mowng |
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| Stitch Length set at O. | |||
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| Thread | knotted | under fabric. | |||
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Machine | Jamming | Knocking | Noise | Thread caught m hook race. | |||
Lmt {n bobbin holder or hook race. | |||||||
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COR RECTION
Choose correct size needle for thread and fabric. Insert new needfe.
Reset needle.
Loosen upper thread tension.
Start to stitch at a medium speed.
Rethread machine.
Loosen upper thread tension.
Choose correct slze needle for thread and fabric. Insert new needle.
Replace needle plate, or polish off burrs completely,
Check bobbin threading.
Clean bobbin holder and hook race,
Remove darning plate.
Adiust Stitch Length Control.
Place both threads back under presser foot before beginning to stitch.
Push in the clutch.
Disassemble and clean hook race.
Clean bobbin holder and hook race.
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