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Troubleshooting
Condition
The needle thread
1. The needle thread is not threaded properly.
breaks.
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 is not set under the presser foot when start
6. The fabric is moved too fast when stitching free motion quilting.
7. The thread is tangled around the spool.
The bobbin thread
1. The bobbin thread is not threaded properly in the bobbin holder.
breaks.
2. Lint has collected in the bobbin holder.
3. The bobbin is damaged and does not turn smoothly.
The needle breaks.
1. The needle is incorrectly inserted.
2. The needle is bent.
3. The needle clamp screw is loose.
4. The needle is too fine for the fabric being used.
5. An inappropriate presser foot is used.
6. The fabric was pulled toward you when sewing free motion quilting
Skipped stitches.
1. The needle is incorrectly inserted, bent or blunt.
2. The needle and/or threads are not suitable for the work being
3. A blue tip needle is not being used for sewing stretch, very fine
4. The needle thread is not threaded properly.
5. A poor quality needle is used.
6. A purple tip needle is not being used for sewing thick fabrics,
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.
4. The stitch length is too long for the fabric.
5. The foot pressure is not adjusted properly.
6. A stabilizer is not used when sewing very fine fabrics.
The fabric is not
1. The feed dogs are packed with lint.
feeding smoothly.
2. The stitches are too fine.
3. The feed dogs are not raised after "drop feed" sewing.
Loops on the seams. 1. The needle thread tension is too loose.
2. The needle is too thick or too fine for the fabric.
The machine does
1. The machine is not plugged in.
not run.
2. Thread is caught in the hook race.
3. The start/stop button is used with the foot control plugged in.
Buttonhole sewing is
1. The stitch density is not suitable for the fabric being sewn.
not sewn properly.
2. The interfacing has not been used for the stretch or synthetic
3. The buttonhole lever is not lowered.
The machine is noisy. 1. Thread is caught in the hook race.
2. Lint is built up in the hook race or bobbin holder.
Auto thread cutting
1. Thread is too thick for the auto thread cutting.
failed.
2. Threads are caught in the auto thread cutter device.
Pattern selection
1. The needle plate for straight stitch is attached to the machine.
keys can not be
2. Dual feed key is on.
selected/grayed out.
3. Floating mode key is on.
4. Twin needle key is on.
5. A.S.R. key is on.
sewing.
with open-toe foot.
sewn.
fabrics and synthetic fabrics.
denims and across the hem.
fabric.
Cause
150
Reference
Pages 23-24
Page 51
Change the needle.
Page 27
Page 41
Page 126
Use the spool holder.
Page 22
Page 147
Change the bobbin.
Page 27
Change the needle.
Page 27
Page 27
Use the correct foot.
Page 126
Page 27
Page 27
Page 27
Pages 23-24
Change the needle.
Page 27
Page 51
Pages 23-24
Page 27
Make stitch shorter.
Page 52
Apply a stabilizer.
Page 147
Make stitch longer.
Page 33
Page 51
Page 27
Pages 12-13
Page 147
Page 13
Page 60
Apply an interfacing.
Page 58
Page 147
Page 147
Page 16
Page 147
Page 32
Pages 43-44
Page 46
Pages 82-83
Page 127
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