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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 and bobbin thread are not set under the presser
6. The thread is either too heavy or too fine for the needle.
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.
4. The thread is wound loosely on the bobbin.
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. An inappropriate presser foot is used.
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 fine fabrics
4. The needle thread is not threaded properly.
5. A poor quality needle is used.
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. A stabilizer is not used when sewing very fine fabrics.
The fabric is not
1. The feed dog is packed with lint.
feeding smoothly
2. The stitches are too fine.
3. The feed dog is not raised after "drop feed" sewing.
Loops on the
1. The needle thread tension is too loose.
seams
2. The needle is too thick or too fine for the fabric.
The machine does
1. The machine is not plugged in.
not work
2. Thread has been caught in the hook race.
3. The start/stop button is used when the foot control is with the foot
4. The bobbin winder spindle is not returned to the left after bobbin
Buttonhole sewing
1. The stitch density is not suitable for the fabric being sewn.
is not sewn
2. The interfacing has not been used for the stretch or synthetic fabric.
properly
The machine is
1. Thread has been caught in the hook race.
noisy
2. Lint has built up in the hook race or bobbin holder.
foot when start sewing.
and synthetics.
control plugged in.
winding.
Cause
47
Reference
Page 18
Pages 11-12
Replace the needle.
Page 13
Page 20
Page 14
Page 17
Page 45
Change the bobbin.
Page 16
Page 13
Page 13
Page 21
Page 14
Use the correct
foot.
Page 13
Page 14
Use the stretch
stitch needle.
Page 18
Change the needle.
Pages 11-12
Page 18
Page 14
Make stitch shorter.
Apply a stabilizer.
Page 45
Make stitch longer.
Page 13
Pages 11-12
Page 14
Pages 5-6
Page 45
Page 8
Page 16
Page 31
Apply an
interfacing.
Page 45
Page 45
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