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Troubleshooting
f
Condition
The needle thread
breaks.
The bobbin thread
breaks.
Cause Reference
1. The needle thread is not threaded properly.
2. The needle thread tension is too tight.
3. The needle is bent or blunt.
4. The needle is incorrectly inserted.
5. The needle thread and the bobbin thread are not set properly
Page 24
Pages 26, 28
Page 10
Page 10
Pages 22, 24, 26
1.
2.
3.
under the presser foot at the beginning of sewing.
The threads are not drawn to the rear after previous sewing. Page 32
The thread is too heavy, or too fine for the needle. Page 14
The bobbin thread is not threaded properly in the bobbin Page 22
case and shuttle.
Lint has collected in the shuttle area. Page 60
The bobbin is damaged and doesnt turn smoothly. Change the bobbin
The needle breaks. 1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The needle clamp screw is loose.
4. The needle thread tension is too tight.
5. The threads are not drawn to the rear after the previous sewing.
6. The needle is too fine for the fabric being sewn.
Skipped stitches 1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
e and/or threads are
3. The needl not suitable for the work being
sewn.
4. A blue needle is not being used for sewing stretch, very fine
fabrics or synthetics.
5. The needle thread is not threaded properly.
6. The wrong need e s be ng used.
Seam puckering 1. The needle thread tension is too tight.
2. The needle thread is not threaded properly.
3. The needle is too heavy for the fabric being sewn.
Page10
Page 10
Page 10
Pages 26, 28
Page 32
Page 14
Page 10
Page 10
Page 14
Page 14
Page 24
Change the needle
Pages 26, 28
Page 24
Page 14
Make stitch shorter4. The stitch length is too long for the fabric.
The cloth is not 1. The feed dog is packed with lint. Page 58
feeding smoothly. 2. The stitches are too fine. Make stitch longer
3. The feed dog is not raised after "drop feed" sewing. Page 38
The machine 1. The machine is not plugged in. Page 6
doesn't work. 2. A thread is caught in the shuttle race. Page 60
3. The push-clutch is disengaged. Pages 18, 20
Noisy operation 1. There is thread caught in the hook race. Page 60
2. Lint has built up in the shuttle or the shuttle race. Page 60
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