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3
WHAT TO DO WHEN
CONDITION
CAUSE
HOW TO FIX
REFERENCE
1.
Skipping stitches.
1. Needle is not inserted
properly.
2. Needle is bent or worn.
3. Incorrectly threaded.
4. Needle or thread is
inappropriate for fabric
being sewn.
5. Sewing on stretch
fabric
6. Presser foot pressure is
too weak.
7. Inappropriate needle
bar height.
8. Inappropriate needle to
hook timing.
9 Inappropriate needle to
shuttle clearance.
1. Insert the needle properly.
2. Change the needle.
3. Retread.
4. Use the recommended
sewing needle and thread.
5. Use a No. 11 blue tip needle.
6. Adjust the presser bar level
to make the pressure
stronger.
7. See mechanical adjustment
“Needle bar height”
8. See mechanical adjustment
“Needle to shuttle timing”.
9. See mechanical adjustment
“Clearance between needle
and hook”.
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Page 15
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2. Fabric not
moving.
1. Presser foot pressure
in too weak.
2. Incorrect feed dog
height.
3. Feed dog is in down
position.
4. Thread on bottom side
of fabric is jammed up.
5. Feed dog teeth are
worn.
1. Adjust the presser bar level
to make the pressure
stronger.
2. See mechanical adjustment
“Feed dog height”.
3. Raise the feed dog level.
4. Make sure to bring both
needle and bobbin.
5. Thread under the foot when
starting sewing.
Page 18
3. Breaking upper
thread.
1. Initial sewing speed is
too fast.
2. Thread path is
incorrect.
3. Needle is bent or dull.
4. Upper thread tension is
too strong.
5. Needle size is
inappropriate for fabric.
6. Needle eye is worn.
7. Needle hole in needle
plate is worn or burred.
1. Start with medium speed.
2. Use the proper thread path.
3. Replace with a new needle.
4. Adjust needle thread tension
correctly.
5. Use appropriate needle for
Fabric and thread in use.
6. Change the needle.
7. Repair the hole or replace the
needle plate.
Page 20
4. Breaking bobbin
thread.
1. Incorrectly threaded
bobbin.
2. Too much thread is
around on the bobbin.
3. Lint is stuck inside the
bobbin holder.
4. Thread quality is too
low.
5. Thread is jamming
around the bobbin.
1. Thread bobbin correctly.
2. Adjust the position of stopper.
3. Clean the hook race
4. Change to a high quality
sewing thread.
5. Clean out the jamming
thread.
