Sewing Machine User Manual

HE-8000
91
16. TROUBLESHOOTING
16. TROUBLESHOOTING
Problem Cause Check Remedy Page
Burrs in needle hole. Needle Replace the needle.
57
Needle is
incorrectly installed.
Needle position
Install the needle
correctly.
57
Upper thread breaks
Threading is
incorrect.
Threading
Thread the upper
thread correctly.
58
Upper thread tension
is too strong.
Main and auxiliary
tension
Adjust to an
appropriate tension.
61
Thread is too thick
for the needle hole.
Needle and thread
Replace the needle with
one that is suitable for
the thread.
Lower thread tension
is too strong.
Lower thread tension
Adjust to an
appropriate tension.
61
Bobbin case
threading is incorrect
.
Bobbin case
threading
Thread the bobbin
correctly to match the
sewing.
60
Needle is incorrectly
installed.
Needle position
Install the needle
correctly.
57
Threading is
incorrect.
Threading
Thread the upper
thread correctly.
58
Skipped stitches
Needle and rotary hook
timing is incorrect.
Needle and rotary
hook timing
Adjust the timing of the
needle and rotary hook.
72
Clearance between
Needle and rotary hook
is too large.
Needle and rotary
hook clearance
Adjust the clearance
between the needle and
rotary hook.
72
Needle bar height is
incorrect.
Needle bar height
Adjust the height of
the needle bar.
71
Lower thread tension
is too strong.
Lower thread tension
Adjust to an
appropriate tension.
61
Thread in bar tacking
area is not tight.
Tension at tack
tension
Adjust the tack
tension.
61
Thread in zigzag sewing
area is not tight.
Tension at zigzag
tension
Adjust the zigzag
tension.
61
Clearance between inner
rotary hook and rotary hook
holder is incorrect.
Clearance between inner
rotary hook and rotary hook
holder
Adjust the clearance be-
tween the inner rotary hook
and rotary hook holder.
73
Lower thread breaks
Poor thread
tightening