151
Troubleshooting
Condition Cause Reference
The needle thread
breaks.
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 is not set under the presser foot when start
sewing.
6. The fabric is moved too fast when stitching free motion quilting.
7. The thread is tangled around the spool.
Pages 24-25
Page 52
Change the needle.
Page 28
Page 42
Page 127
Use the spool holder.
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 does not turn smoothly.
Page 23
Page 148
Change the bobbin.
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 ne for the fabric being used.
5. An inappropriate presser foot is used.
6. The fabric was pulled toward you when sewing free motion quilting
with open-toe foot.
Page 28
Change the needle.
Page 28
Page 28
Use the correct foot.
Page 127
Skipped stitches. 1. The needle is incorrectly inserted, bent or blunt.
2. The needle and/or threads are not suitable for the work being
sewn.
3. A blue tip needle is not being used for sewing stretch, very ne
fabrics and synthetic fabrics.
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,
denims and across the hem.
Page 28
Page 28
Page 28
Pages 24-25
Change the needle.
Page 28
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 ne fabrics.
Page 52
Pages 24-25
Page 28
Make stitch shorter.
Page 53
Apply a stabilizer.
The fabric is not
feeding smoothly.
1. The feed dogs are packed with lint.
2. The stitches are too ne.
3. The feed dogs are not raised after “drop feed” sewing.
Page 148
Make stitch longer.
Page 34
Loops on the seams. 1. The needle thread tension is too loose.
2. The needle is too thick or too ne for the fabric.
Page 52
Page 28
The machine does
not run.
1. The machine is not plugged in.
2. Thread is caught in the hook race.
3. The start/stop button is used with the foot control plugged in.
Pages 12-13
Page 148
Page 13
Buttonhole sewing is
not sewn properly.
1. The stitch density is not suitable for the fabric being sewn.
2. The interfacing has not been used for the stretch or synthetic
fabric.
3. The buttonhole lever is not lowered.
Page 61
Apply an interfacing.
Page 59
The machine is noisy. 1. Thread is caught in the hook race.
2. Lint is built up in the hook race or bobbin holder.
Page 148
Page 148
Auto thread cutting
failed.
1. Thread is too thick for the auto thread cutting.
2. Threads are caught in the auto thread cutter device.
Page 16
Page 148
Pattern selection
keys are grayed out.
1. The needle plate for straight stitch is attached to the machine.
2. Dual feed key is on.
3. Floating mode key is on.
4. Twin needle key is on.
5. A.S.R. key is on.
Page 33
Pages 44-45
Page 47
Pages 83-84
Page 128
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