1
MODEL BL9
TROUBLESHOOTING
PROBLEM
CAUSE
REMEDY
REFERENCE
1. Skipping
1. Needle is not inserted
Insert the needle properly.
stitches
properly.
2. Needle is bent or worn.
Change the needle.
3. Incorrectly threaded
Rethread.
4. Needle or thread are
Use the recommended sewing
inappropriate for fabric being
needle and thread.
sewn.
5. Sewing on stretch fabric
Use A #11 blue tip needle.
6. Inappropriate needle bar
See mechanical adjustment
P. 16
height
“
Needle bar height.”
7. Inappropriate needle to hook
See mechanical adjustment
P. 17
timing
“Needle timing to shuttle.”
8. Inappropriate needle to hook
See mechanical adjustment
P. 13, 14
clearance
“Clearance between needle and
hook.”
2. Fabric not
1. Incorrect feed dog height
See mechanical adjustment
P. 15
moving
“Feed dog height.”
2. Thread on bottom side of
Make sure to bring both needle
fabric is jammed up.
and bobbin thread under the foot
when starting sewing.
3. Feed dog teeth are worn.
Change the feed dog.