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Troubleshooting
F
Condition
The needle thread
breaks.
The bobbin thread
breaks.
The needle breaks.
Skipped stitches
Seam puckering
The cloth is not
feeding smoothly.
.
2.
3.
4.
5.
°
7°
Cause Reference
The needle thread is not threaded properly.
The needle thread tension is too tight.
The needle is bent or blunt.
The needle is incorrectly inserted.
The needle thread and the bobbin thread are not set
properly under (drawn to the rear of) the presser foot
when sewing is starting.
The fabric is not drawn to the rear when sewing is
finished.
The thread is too heavy or too fine for the needle.
1. The bobbin thread is not threaded properly in the
bobbin holder.
2. Lint has collected in the bobbin holder.
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.
5. The needle thread is not threaded properly.
6. The presser foot pressure is not strong enough,
7. The wrong needle is used.
Page 24
Pages26,28
PagelO
Page!O
Page24
Page34
Page14
Page22
Page 84
Changethe bobbin
Page10
Page10
Page10
Pages 26, 28
Page 34
Page14
PagelO
PagelO
Page14
Page 14
Page 24
Page 8
Change the needle
Pages26,28
Page 24
Page14
Make stitch denser
Page 8
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.
4. The stitch length is too long for the fabric,
5. The presser foot pressure is not correctly adjusted.
1. The feed dog is packed with lint.
2. The presser foot pressure is too weak.
3. The stitches are too fine,
4. The feed dog was not raised after "drop feed" was used.
Page 86
Page 8
Make stitch coaser
Page 8
The machine 1. The machine is not plugged in. Page 6
doesn't work. 2. A thread is caught in the hook race. Page 86
3. Push-clutch is disengaged. Page 20
Patterns are dis- 1, The stitch is not balanced. Page 30
totted.
Noisy operation 1, There is thread caught in the hook race. Page 86
2. Lint has built up in the bobbin holder or hook race. Page 86
,. J
88
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