35
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 and the bobbin thread are not set
under the presser foot when start sewing.
6. The threads were not drawn to the rear after sewing.
7. The thread is too heavy or too fine for the needle.
Page 13
Page 17
Page 8
Page 8
Page 18
Page 18
Page 9
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 12
Page 33
Change the bobbin.
The needle breaks 1. The needle is incorrectly inserted.
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.
Page 8
Page 8
Page 9
Use the correct foot.
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 and synthetics.
4. The needle thread is not threaded properly.
5. A poor quality needle is used.
Page 8
Page 9
Page 9
Page 13
Change the needle.
Seam puckering
1. The needle thread tension is too tight.
2. The needle thread or bobbin 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.
* Use a stabilizer for very fine fabrics.
Page 17
Page 12, 13
Page 9
Make stitch shorter.
The fabric is not
feeding smoothly
1. The feed dog is packed with lint.
2. The stitches are too fine.
3. The feed dog is lowered.
Page 33
Make stitch longer.
Page 6
Stitch form loops
below the work
1. The needle thread tension is too loose.
2. The needle is too thick or too fine for the fabric.
Page 17
Page 9
The machine does
not work
1. The machine is not plugged in or foot control is not
connected.
2. Thread has been caught in the hook race.
3. The clutch is disengaged.
Page 5
Page 33
Page 11
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.
Page 24
Apply an interfacing.
The machine is
noisy
1. Thread has been caught in the hook race.
2. Lint has built up in the hook race or bobbin holder.
Page 33
Page 33
Troubleshooting
