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Troubleshooting
Condition
Cause
The fabric is not
1. The feed dog is packed with lint.
being fed
2. The presser foot has been raised.
smoothly.
3. Pressure of the foot is too weak.
The needle
1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
breaks.
3. The fabric is forcedly pulled.
The thread
1. The machine is not correctly threaded.
breaks.
2. The needle or looper thread tension is too tight.
3. The needle is incorrectly inserted.
4. The needle is bent or blunt.
Skipped stitches
1. The needle is bent or blunt.
2. The machine is not correctly threaded.
3. The needle is incorrectly inserted.
The seam is not
1. The needle and/or looper thread tensions are
sewn neatly.
2. The machine is not correctly threaded.
3. The needle and/or the thread are not suitable
4. The thread is not between the tension discs.
Seam puckering.
1. The needle or looper thread tension is too tight.
2. The machine is not correctly threaded.
3. The differential feed dial is not correctly
1. The machine has not been plugged in firmly.
The machine
does
2. The power switch is turned off.
not operate.
The fabric is not
1. The position of the upper knife is not adjusted
cut neatly.
2. The upper knife is dull.
All manuals and user guides at all-guides.com
not correctly adjusted.
for the fabric being sewn.
adjusted.
properly.
92
Reference
See page 88.
Lower the presser foot.
See page 20
See page 18.
See page 18.
Pull the fabric lightly.
See pages 34 ~ 52 62 and 66.
See pages 58~60, 64, 68~70.
See page 18.
See page 18.
See page 18.
See pages 34 ~ 52, 62 and 66.
See page 18.
See pages 34 ~ 52, 58~60, 64,
68~70.
See pages 34 ~ 52, 62 and 58.
See pages 72 and 74.
See pages 44, 48 and 52.
See pages 34 ~ 52, 58~60, 64, 68~70.
See pages 32 ~ 50 62 and 66.
See page 22.
See page 12.
See page 12.
See page 86.
Replace the upper knife.
(See page 86.)
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