1
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 are
inappropriate for fabric being
sewn.
5. Sewing on stretch fabric.
6. Inappropriate needle bar height.
7. Inapppropriate needle to hook
timing.
8. Inappropriate needle to hook
clearance.
Insert the needle properly.
Change the needle.
Rethread.
Use the recommended sewing needle
and thread.
Use a #11 blue tip needle.
See mechanical adjustment “Needle
bar height”.
See mechanical adjustment “Needle
to hook timing”.
See mechanical adjustment
“Clearance between needle and hook”.
p. 11
p. 12
p. 13
2. Fabric not
moving
1. Incorrect f.d. Height.
2. f.d. Is in down position.
3. Thread on bottom side of fabric
is jammed up.
4. Feed dog teeth are worn.
See mechanical adjustment “feed
dog height”.
Raise the f.d. Level.
Make sure to bring both needle and
bobbin thread under the foot when
starting sewing.
Change the feed dog.
p. 15
WHAT TO DO WHEN
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.
Start with medium speed.
Use the proper thread path.
Replace with a new needle.
Adjust needle thread tension correctly.
Use appropriate needle for fabric
and thread in use.
Change the needle.
Repair the hole or replace the needle
plate.
p. 18