Jocel JMC013279 - Checking Performance Problems-Troubleshooting

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CHECKING PERFORMANCE PROBLEMS – TROUBLESHOOTING
Problem
Probable cause
What to do
Fabric does not
move
- Feed teeth down
- Raise feed teeth
Breaking needle
- Incorrect insertion of needle
- Bent needle
- Fabric is being pulled
- Needle, thread and fabric do
not match
- Re-insert needle
- Replace needle
- Do not pull fabric
- Use correct needle and thread
Breaking upper
thread
- Faulty adjustment of zigzag
width
- Improper threading
- Tight upper thread tension
- Bent needle
- Scratches or nicks on bobbin
case
- Re-adjust zigzag width
- Re-thread machine
- Reduce upper thread tension
- Replace needle
- Polish or replace bobbin case
Breaking bobbin
thread
- Tight bobbin thread tension
- Incorrect insertion of needle
- Improper threading
- Lint or thread in bobbin case
- Reduce bobbin thread tension
- Re-insert needle
- Rethread machine
- Clean bobbin case
Machine
jamming
- Excessive tension
- Needle, thread and fabric do
not match
- No oil
- Re-adjust tension
- Reduce proper needle and
thread according to type of
fabric
- Oil moving parts
Puckering
- Tension too tight
- Incorrect fabric, needle,
and thread
- Reset
- Use correct fabric, needle
and thread