−
20
−
6. Adjustment of the pressure of the work clamp unit
The pressure of the work clamp unit should be minimized as
long as the material does not warp during sewing. Loosen
adjusting screw
and turn adjusting screw
to obtain the
aforementioned pressure.
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
8. Adjustment of the wiper spring
Wiper spring
retains the needle thread after thread trimming
in between wiper
and the wiper spring. Correct properly
the tension of wiper spring
so that the tension at that time
becomes 0.2 to 0.3N (a little higher tension than that of the
bobbin thread coming out of the bobbin case).
(Caution)
If the retaining oftheneedlethreadis excessive,
the threadmay protrude fromthe upper sideof the
button.
7. Adjustment of the wiper
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
1) Loosen screw
to adjust so that a clearance of 2.5 mm
or more is provided between the wiper and the needle.
2) Loosen screw
to adjust so that a distance of 15 to 17
mm is provided between the end face of the wiper and
the center of the needle. After the adjustment, securely
tighten the screw.
(Caution)
Thepositionoftheneedleiswhenthesewing
machinehasstoppedafterthesewingnished.
2.5mm
15–17mm
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