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Troubleshooting
Condition
The needle
1. The needle thread is not threaded properly.
thread 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 the bobbin thread are not set
6. The threads were not drawn to the rear after sewing.
7. The thread is too heavy or too fine for the needle.
The bobbin
1. The bobbin thread is not threaded properly in the bobbin
thread breaks
2. Lint has collected in the bobbin holder.
3. The bobbin is damaged and does not turn smoothly.
The needle
1. The needle is incorrectly inserted.
breaks
2. The needle clamp screw is loose.
3. The needle is too fine for the fabric being sewn.
4. 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
3. A blue tip needle is not being used for sewing stretch,
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 or bobbin thread is not threaded
3. The needle is too heavy for the fabric being sewn.
4. The stitch length is too long for the fabric.
* Use a stabilizer for very fine fabrics.
The fabric is
1. The feed dog is packed with lint.
not feeding
2. The stitches are too fine.
smoothly
3. The feed dog is lowered.
Stitch form loops
1. The needle thread tension is too loose.
below the work
2. The needle is too thick or too fine for the fabric.
The machine
1. The machine is not plugged in or foot control is not
does not work
2. Thread has been caught in the hook race.
3. The clutch is disengaged.
Buttonhole
1. The stitch density is not suitable for the fabric being
sewing is not
sewn properly
2. The interfacing has not been used for the stretch or
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.
under the presser foot when start sewing.
holder.
being sewn.
very fine fabrics and synthetics.
properly.
connected.
sewn.
synthetic fabric.
Cause
58
Reference
Page 22
Page 26
Page 12
Page 12
Page 28
Page 28
Page 14
Page 20
Page 54
Change the bobbin.
Page 12
Page 12
Page 14
Use the correct foot.
Page 12
Page 14
Page 14
Page 22
Change the needle.
Page 26
Page 20, 22
Page 14
Select a shorter
stitch.
Page 54
Select a longer stitch.
Page 8
Page 26
Page 14
Page 6
Page 54
Page 18
Page 38
Apply a interfacing.
Page 54
Page 54
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