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Adjustment Procedures
1. Needle thread clamp notch R adjustment
1) Loosen the 2 setscrews
2) Press the needle thread clamp link complete
the distance between the needle thread clamp
thread clamp base
Type.
Move the needle thread clamp notch R
thread clamp notch RH
toward the needle thread clamp cam plate
setscrews
.
2. Needle thread clamp notch F adjustment
1) Loosen the 2 setscrews
2) Press the needle thread clamp link complete
the distance between the needle thread clamp
thread clamp base
Type. Move the needle thread clamp notch F
needle thread clamp notch FH
it toward the needle thread clamp cam plate
setscrews
.
.
becomes 21mm for S Type and 16.5mm for H
(S Type) or the needle
(H Type) in Direction D, lightly press it
.
becomes 23mm for S Type and 21mm for H
(H Type) in Direction E, lightly press
in Direction A so that
and the needle
, and tighten the two
in Direction C so that
and the needle
(S Type) or the
, and tighten the 2
– 75 –
Results of Improper Adjustment
o If the distance is too long between
the needle thread clamp
the needle thread clamp base
the needle thread release timing
becomes earlier and this can be
a cause of unthreading at the
beginning of sewing.
o If the distance is too short be-
tween the needle thread clamp
and the needle thread clamp base
, the needle thread release tim-
ing is delayed and this can be a
cause of needle thread end re-
maining on the rear side of the
material.
o If the distance is too long between
the needle thread clamp
the needle thread clamp base
the needle thread release timing
becomes earlier and this can be
a cause of needle thread end re-
maining on the rear side of the
material or jamming of needle
thread into the needle thread
clamp
.
o If the distance is too short be-
tween the needle thread clamp
and the needle thread clamp base
, the needle thread clamp tim-
ing is delayed and this can be a
cause of failure in needle thread
clamping.
o Adjustments should conform to
the adjustment values according
to the needle thread clamp speci-
fications (S Type or H Type). Oth-
erwise, this can be a cause of fail-
ure in needle thread clamping op-
eration.
and
,
and
,
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