Table of Contents
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Troubleshooting
Condition
Cause
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 is not set under the presser foot when start sewing.
6. The fabric is moved too fast when stitching free motion quilting.
7. The thread is tangled around the spool.
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.
The needle breaks
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.
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. The foot pressure is not adjusted properly.
6. 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 or foot control is not connected.
not work
2. Thread has been caught in the hook race.
3. The presser foot is not lowered.
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.
Layers shift
1. The foot pressure is not suitable for fabrics being sewn.
Auto thread cutting
1. Thread is too thick for the auto thread cutting.
failed
2. Threads have been caught in the thread cutter mechanism.
The stitch pattern
1. The needle plate for straight stitch is attached to the machine.
cannot be selected.
2. The stitch pattern is 40 or 42 in mode 2 (Bridge stitches).
The needle thread
1. Thread tension is not balanced.
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.
and synthetics.
91
Reference
Page 22
Page 13
Page 17
Page 17
Page 29
Page 68, 69
Use the spool holder.
Page 21
Page 87
Change the bobbin.
Page 17
Page 17
Page 68
Page 17
Use the correct foot.
Page 17
Page 17
Use the stretch stitch
needle.
Page 22
Change the needle.
Page 13
Page 22
Page 17
Make stitch shorter.
Page 12
Apply a stabilizer.
Page 87
Make stitch longer.
Page 12
Page 13
Page 17
Page 7
Page 87
Page 11
Page 50
Apply an interfacing.
Page 48
Page 87
Page 87
Page 12
Page 9
Page 87
Page 32
Page 78
Page 13
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