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Troubleshooting
Problem
Cause
Needle thread
1. The machine is not threaded correctly.
breaks.
2. The thread tension is too tight.
3. The needle is bent or blunt.
4. The needle is not set correctly.
5. A wrong needle is used.
Needle bends or
1. The needle is bent or blunt.
breaks.
2. The needle is not set correctly.
3. The needle clamp screw is loose.
4. The fabric is forcedly pulled.
1. The needle is not set correctly.
Skipped stitches
2. The needle is bent or blunt.
3. The tension is out of balance.
4. The machine is not threaded correctly.
Seam puckering
1. The tension is out of balance.
1. The machine is not connected to the power supply.
Machine does not
operate.
2. The foot control is not plugged in firmly.
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Reference
See pages 16–26.
See pages 28, 30.
See page 14.
See page 14.
See page 14.
See page 14.
See page 14.
See page 14.
Do not pull the fabric.
See page 14.
See page 14.
See pages 28, 30.
See pages 16-26.
See pages 28, 30.
See page 6.
See page 6.
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