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Troubleshooting
Condition
The needle thread
breaks
The bobbin thread
breaks
The needle breaks
Skipped stitches
Seam puckering
The cloth is not feeding
smoothly
Loops on the seams
The machine does not
work
Buttonhole sewing is
not sewn properly
The machine is noisy
Layers shift
Auto thread cutting
failed
The stitch pattern
cannot be selected.
The needle thread
appears on the wrong
side of the fabric when
the stitch width value
is larger than "7.0".
It is not abnormal for a faint humming sound to be heard from the internal motors.
The LCD screen and function key area may become warm after several hours of continuous use.
Cause
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 threads were not drawn to the rear after sewing.
7. The fabric is moved too fast when stitching free motion quilting.
8. The thread is tangled around the spool.
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.
1. The needle is incorrectly inserted.
2. The needle clamp screw is loose.
3. The fabric is pulled forward when using the open-toe foot.
4. The needle is too fine for the fabric being used.
5. An inappropriate presser foot is used.
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 stretch stitch 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.
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.
A stabilizer is not used when sewing very fine fabrics.
1. The feed dog is packed with lint.
2. The stitches are too fine.
3. The feed dog is not raised after "drop feed" sewing.
1. The needle thread tension is too loose.
2. The needle is too thick or too fine for the fabric.
1. The machine is not plugged in or foot control is not connected.
2. Thread has been caught in the hook race.
3. The presser foot is not lowered.
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.
1. Thread has been caught in the hook race.
2. Lint has built up in the hook race or bobbin holder.
1. The foot pressure is not suitable for fabrics being sewn.
1. Thread is too thick for the auto thread cutting.
2. Threads have been caught in the thread cutter mechanism.
1. The needle plate for straight stitch is attached to the machine.
2. The stitch pattern is 166, 167 and 169 (Bridge stitches).
1. Thread tension is not balanced.
107
Reference
Page 22
Page 12
Page 17
Page 17
Page 33
Page 33
Page 79
Use the spool holder.
Page 21
Page 103
Change the bobbin.
Page 17
Page 17
Page 79
Page 17
Use the correct foot.
Page 17
Page 17
Use the stretch stitch
needle.
Page 22
Change the needle.
Page 12
Page 22
Page 17
Make stitch shorter.
Page 11
Apply a stabilizer.
Page 103
Make stitch longer.
Page 11
Page 12
Page 17
Page 6
Page 103
Page 10
Page 58
Apply an interfacing.
Page 56
Page 103
Page 103
Page 11
Page 7
Page 103
Page 39
Page 91
Page 12
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