12-11
Error Type
Cause
①
Upper thread is trimmed
too short and comes
unthreaded
②
Upper thread is trimmed
too long and thread tail
remains on the embroidery
①
Failure of movable and
fixed blades
②
Loose cross tension of the
blades
③
Movable blade damaged
④
Incorrect return position of
movable blade
①
Bad fuse in motor for
upper thread holder and
error in connector
②
Poor quality circuit board
①
Short strokes of upper
thread holder
②
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
SHORT
MEDIUM
MEDIUM
LONG
The default is
.
Ref. 7-44, 7-5-3)
Ref. 7-40 (7)TRIM LENGT
(Adjust length of the
remaining thread after
trimming)
Ref. 11-3, 11-1-4)
Ref. 11-1, 11-1-1)
※
Check fuse spec
Ref. 9-1, 9-1)
Ref. 11-4, 11-4)
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