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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 threads is not set under the presser foot when start
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 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 work
2. Thread has been caught in the hook race.
3. 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 properly
2. The interfacing has not been used for the stretch or synthetic fabric.
3. The buttonhole lever is not lowered.
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.
sewing.
and synthetics.
winding.
Cause
53
Reference
Page 18
Page 11-12
Page 14
Page 14
Page 21
Page 14
Page 17
Page 51
Change the bobbin.
Page 16
Page 14
Page 14
Page 21
Page 14
Use the correct foot.
Page 14
Page 14
Use the stretch
stitch needle.
Page 18
Change the needle.
Page 11-12
Page 18
Page 14
Make stitch shorter.
Apply a stabilizer.
Page 51
Make stitch longer.
Page 13
Page 11-12
Page 14
Page 6
Page 51
Page 16
Page 32
Apply an interfacing.
Page 31
Page 51
Page 51
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