SunStar SWF/B Series User Manual page 145

Error Type
Short upper thread after
Short upper
trimming
thread after
Upper thread is trimmed
trimming
too short and comes
unthreaded
Upper thread is trimmed
too long and thread tail
remains on the embroidery
Failure of movable and
Thread is not
fixed blades
trimmed
Lose cross tension of the
blades
Movable blade damaged
Incorrect return position of
movable blade
Short-circuit of fuse
Failure of upper
thread holder
solenoid
Poor connection/quality of
solenoid
Bad connection
Poor quality circuit board
Short strokes of upper
Failure to hold
thread holder
upper thread
Upper thread holder
overloaded
Cause
• check upper thread tension
• set LONG or MEDIUM length of
trimmed thread in data set-up
• set MEDIUM or SHORT length
of trimmed thread in data set-up
• if upper thread is held by a
narrow velcro in upper thread
holder, clean the velcro
Check screws
Check tension of fixed blade
Change movable blade
Adjust the position of movable
blade
Check/change fuse F3 in joint
board
Check/change solenoid &
connection
Check connection
Change thread detecting plate in
sub controller
Adjust stroke
Adjust the workload
Inspection & Repair Reference
The default is MEDIUM.
See 7.4.6, 7.4.7
See 11.1.2
See 11.1.1
Check fuse rating
See 9.1
See 11.4