Checking Performance Problems-Troubleshooting - Necchi 270 Instruction Manual

CHECKING PERFORMANCE PROBLEMS – TROUBLESHOOTING
Problem
Fabric does not
move
Breaking needle
Breaking upper
thread
Breaking bobbin
thread
Machine
jamming
Puckering
Probable cause
- Feed teeth down
- Stitch length dial "0" position
- Light presser foot pressure
- Incorrect insertion of needle
- Bent needle
- Fabric is being pulled
- Needle, thread and fabric do
not match
- Faulty adjustment of zigzag
width
- Improper threading
- Tight upper thread tension
- Bent needle
- Scratches or nicks on bobbin
case
- Tight bobbin thread tension
- Incorrect insertion of needle
- Improper threading
- Lint or thread in bobbin case
- Excessive tension
- Presser foot pressure too
strong
- Needle, thread and fabric do
not match
- No oil
- Tension too tight
- Sewing foot pressure too
strong
- Incorrect fabric, needle,
and thread
- Raise feed teeth
- Set dial between 1 and 4
- Increase pressure
- Re-insert needle
- Replace needle
- Do not pull fabric
- Use correct needle and thread
- Re-adjust zigzag width
- Re-thread machine
- Reduce upper thread tension
- Replace needle
- Polish or replace bobbin case
- Reduce bobbin thread tension
- Re-insert needle
- Rethread machine
- Clean bobbin case
- Re-adjust tension
- Change pressure accordingly
- Reduce proper needle and
thread according to type of
fabric
- Oil moving parts
- Reset
- Reduce sewing foot pressure
- Use correct fabric, needle
and thread
- 32 -
What to do