53
Troubleshooting
Condition Cause
Remedy
The needle thread breaks
1. The thread is not threaded properly.
2. The 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 under the
presser foot when start sewing.
6. The threads were not drawn to the rear after sewing.
7. The thread is either too heavy or too fine for the needle.
Page 18, 19
Page 23, 24
Change the needle.
Page 14
Page 20
Page 25
Page 14
The bobbin thread breaks
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.
4. The thread is wound loosely on a bobbin.
Page 17
Page 51
Replace the bobbin.
Page 15, 16
The needle breaks
1. The needle is incorrectly inserted.
2. The needle clamp screw is loose.
3. The threads were not drawn to the rear after sewing.
4. The needle is too fine for the fabric being used.
5. The presser foot is not appropriate for the stitch pattern being sewn.
6. The needle is incorrectly inserted, bent or blunt.
Page 14
Page 15
Page 25
Page 14
Use proper foot.
Change the needle.
Skipped stitches
1. The needle and/or threads are not suitable for the work being sewn.
2. A blue shank needle is not being used for sewing stretch, very fine
fabrics and synthetics.
3. The thread is not threaded properly.
4. A poor quality needle is used.
5. The thread tension is too tight.
Page 14
Page 14
Page 18, 19
Page 14
Page 23, 24
Seam puckering
1. The needle is too heavy for the fabric being sewn.
2. The stitch length is too long for the fabric.
Page 14
Make the stitches shorter.
The cloth is not feeding
smoothly
1. Accumulation of lint on the feed dog.
2. The stitches are too fine.
3. The feed dog is not raised after “drop feed” sewing.
Page 51
Make the stitches longer.
Page 14
Stitches form loops below
the works
1. The thread tension is too tight.
2. The needle is either too heavy or too fine for the thread.
Page 23, 24
Page 14
The machine does not
work
1. The machine is not plugged in.
2. Thread has been caught in the hook race.
3. The bobbin winder spindle is not returned to the left after bobbin
winding.
Page 9
Page 51
Page 16
Buttonhole sewing is not
sewn properly
1. The stitch density is not suitable for the fabric being sewn.
2. Suitable interface material has not been used for the stretch or syn-
thetic fabric.
Page 34
Use an interfacing.
The machine does not run
smoothly and is noisy
1. Thread has been caught in the hook race.
2. Lint has built up in the hook race or bobbin holder.
Page 51
Page 51
Abnormal noise from the
hook area and faulty
stitches
1. The bobbin holder is worn or damaged. Replace the bobbin holder.
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