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Troubleshooting
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Condition
The needle thread
breaks.
The bobbin thread
breaks.
The needle breaks.
Skipped stitches
Cause Reference
1. The needle thread is not threaded properly.
2. The needle thread tension istoo 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
under the presser foot when sewing is starting.
6. The fabric is not drawn to the rear when sewing is finished.
7. The thread is too heavy or too fine for the needle.
1. The bobbin thread is not threaded properly in the bobbin
case and shuttle.
2. Lint has collected in the shuttle area.
3. The bobbin is damaged and doesn't turn smoothly.
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 fabric is not drawn to the rear when sewing is finished.
6. The needle is too fine for the fabric being sewn.
1. The needle is incorrectly inserted.
2. The needle is bent or blunt.
3. The needle and/or threads are not suitable for the work being
sewn.
4. A blue needle is not being used for sewing stretch, very fine
fabrics and synthetics.
The needle thread is not threaded properly.
The wrong needle is used.
Page 24
Pages 26, 28
Page 10
Page 10
Page 24
Page 32
Page 14
Page 22
Page 70
Changethe bobbin
Page 10
Page 10
Page 10
Pages 26, 28
Page 32
Page 14
Page 10
Page 10
Page 14
Page 14
5. Page 24
6. Change the needle
Seam puckering 1. The needle thread tension is too tight. Pages 26, 28
2. The needle thread is not threaded properly. Page 24
3. The needle is too heavy for the fabric being sewn. Page 14
4. The stitch length is too long for the fabric. Make stitch denser
The cloth is not 1. The feed dog is packed with lint. Page 68
feeding smoothly. 2. The stitches are too fine. Make stitch coarser
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 70
3. Push-clutch is disengaged. Pages 18, 20
Patterns are 1. The stitch is not balanced. Page 30
distorted.
Noisy operation 1. There is thread caught in the hook race.
2. Lint has built up in the shuttle or the shuttle race.
Page 70
Page 70
74