TROUBLESHOOTING GUIDE
Problem Cause Check Solution Page
Thread fraying
or breakage
Burr in thread path ―
Remove with
sandpaper.
Blunt needle tip ― Replace needle. 4
Skipped
stitches
Improper needle
installation
Needle facing, height Reinstall needle. 4
Wrong needle for
application
Needle size , length
Replace needle with
larger count needle.
Bent nee dle
Blunt tip
Needle Replace needle. 4
Blunt rotary hook point Rotary hook point Replace rotary hook
Improper threading Threading Rethread. 4
Poor presser foot
co ntact
Presser bar pressure
Tighten presser foot
adjustment screw.
Presser bar he ight
Adjust presser bar
height
Improper needle to rotary
hook timing
Needle bar r ise
Adjust needle to rotary
hook timing
15
Needle bar height
Adjust needle to rotary
hook timing.
15
Needle to r otary
hook timing
Tighten presser foot
adjustment screw.
15
Needle thread remainder
too short; does not
remain in material.
― Adjust pretension. 6
Bobbin spins during thread
cutting and bobbin thread
remainder gets too short;
won't rise.
Bobbin presser
spring
Replace bobbin presser
spring.
Thread take-up spring
tension too weak, won't
raise bobbin thread.
Th read take-u p
spring tension
Adjust take-up spring
tension
6
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