1. Needle thread clamp notch R adjustment
1) Loosen the two set screws
.
2) Press the needle thread clamp link complete
in Direction A so that
the distance between the needle thread clamp
and the needle
thread clamp base
becomes 21mm for S Type and 16.5mm for H
Type.
Move the needle thread clamp notch R
(S Type) or the needle
thread clamp notch RH
(H Type) in Direction D, lightly press it
toward the needle thread clamp cam plate
, and tighten the two
setscrews
.
2. Needle thread clamp notch F adjustment
1) Loosen the two set screws
.
2) Press the needle thread clamp link complete
in Direction C so that
the distance between the needle thread clamp
and the needle
thread clamp base
becomes 23mm for S Type and 21mm for H
Type. Move the needle thread clamp notch F
(S Type) or the
needle thread clamp notch FH
(H Type) in Direction E, lightly press
it toward the needle thread clamp cam plate
, and tighten the two
setscrews
.
o If the distance is too long between
the needle thread clamp
and
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
and
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.
– 66 –
Adjustment Procedures
Results of Improper Adjustment
