8-11
Error Type Cause
Upper thread is trimmed
too short and comes
unthreaded
Upper thread is trimmed
too long and thread tail
remains on the embroidery
Failure of movable and
fixed blades
Loose cross tension of the
blades
Movable blade damaged
Incorrect return position of
movable blade
Bad fuse in motor for
upper thread holder and
error in connector
Poor quality circuit board
Short strokes of upper
thread holder
Upper thread holder
overloaded
Inspection & Repair
check upper thread tension
set or
length of trimmed thread in
data set-up
set or
length of trimmed thread in
data set-up
if upper thread is held due to
narrow velcro space in upper
thread holder, clean the
velcro
Check screws and crank driver
clamp screws of the movable
blade
Check tension of fixed blade
Change movable blade
Adjust the position of movable
blade
Check and replace F1, FF2,
and F3 on the joint board
Replace the joint board
Adjust stroke
Adjust the workload
SHORTMEDIUM
MEDIUMLONG
The default is .
Check fuse spec
MEDIUM
Reference
Short upper
thread after
trimming
Thread is not cut
(at specific
head)
Failure of upper
thread holder
Motor
Failure to hold
upper thread
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