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Stitch forming is loose.
Work holder does not
fall.
Wiper system does not
work.
Sewing pattern is
changed.
Returned home position
is changed.
Oil consumption of the
machine head is too
much
Oil consumption of the
hook is too much
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.
Sewing material is not held
Foot switch is broken.
Air presser is not strong
enough
Wiper hits needle or presser
foot.
Wiper setting is turned off.
Sewing material is not pressed
properly.
Sewing material in work holder
slips.
Sewing material is too heavy.
X-Y timing belt tension is
loose.
Ambient temperature is out of
use range.
Clearance between detector
and detecting subject is too
wide.
Oil amount is too much.
Oil amount is too much.
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.
Hold the sewing material
sufficiently.
Change foot switch.
Increase air presser
Adjust wiper position.
Turn wiper setting on.
Adjust work holder pressure.
Put slip stopper on presser
plate.
Slow down sewing speed.
Adjust timing belt tension
properly.
Use sewing machine in
ambient temperature in 5
degrees to 35 degrees.
Adjust clearance in 1 to
1.5mm.
Reduce the oil amount
Reduce the oil amount
- 60 -
5-9
5-8
6-8-2
6-6
6-6
-
-
6-10
6-7
6-7
6-10
-
Operation
panel
section
7-6-4
-
7-6-2
6-5
6-4
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