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Trimming is not
functioned.
Stitch forming is
loose.
All switches do not
work after turning
power on.
Work holder does not
fall.
Wiper system does
not work.
Sewing pattern is
changed.
Returned home
position is changed.
Movable knife is at wrong
position.
Skip stitching happens in
trimming.
Trimming setting is off.
Upper thread tension is too
loose.
Bobbin thread tension is too
loose.
Strength of thread take up
spring is inadequate.
Presser foot position is not
proper.
Presser foot up and down
timing is not proper.
Tilting detect switch is kept
on.
Foot switch is broken.
Work holder presser is not
strong enough
Work holder switch is out of
order
Wiper hits needle or presser
foot.
Wiper setting is turned off.
Sewing material is not
pressed properly.
Sewing material in work
clamp slips.
Sewing material is too heavy. Slow down sewing speed.
X-Y timing belt tension is
loose.
Ambient temperature is out of
use range.
Clearance between detector
and detecting subject is too
wide.
Adjust position of movable
knife properly.
Refer to the condition
"Frequent skip stitching
happens".
Turn trimming setting on.
Adjust upper thread tension.
Adjust bobbin thread tension.
Adjust strength of thread take
up spring.
Adjust presser foot position
properly.
Adjust presser foot up and
down properly.
Check tilting detect switch.
Change foot switch.
Increase work holder presser
Change it new work holder
switch
Adjust wiper position.
Turn wiper setting on.
Adjust work holder pressure.
Put slip stopper on presser
plate.
Adjust X-Y belt tension
properly.
Use sewing machine in
ambient temperature in 5
degrees to 35 degrees.
Adjust clearance in 1 to
1.5mm.
- 39 -
7-14-2.7
-
Operation
panel section
6-3
6-3
7-15
7-6,7-7
7-8
7-5
3-8
-
7-12
-
7-11
7-11
7-12
-
6-1
7-22
-
7-19
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