Adjustment Procedures
1)
Changing the longitudinal
momentum
(top feed amount)
of
the top feed
dog
G)
Loosen top feed lock nut
Ct
and move top feed lever 8
in
the
direction of the arrow mark to adjust the stroke.
® When top feed fine adjustment screw 8
Is
used, it Is possible
to slightly move top feed lever
8.
2) Changing the maximum momentum
CD
Loosen setscrew O
in
the differe~tial feed adjustment stopper
and lower the stopper to increase the maximum momentum
and raise the stopper to decrease
it.
® After the adjustment, securely tighten setscrew 8 in the
differential adjustment stopper.
3)
Changing the minimum momentum
CD
Loosen setscrew • in the differential feed adjustment stopper
and lower the stopper to increase the minimum momentum
and
raise the stopper to decrease
it.
® After the adjustment, securely tighten setscrew 8 in the
differential adjustment stopper.
-43-
Results
of
Improper Adjustment
o If the min. stroke
is
decreased
to 1
mm
or less, the components
mounted inside the machine
head may come
In
contact with
among
one
another.
It
is
therefore necessary to set the
min. stroke to 1 mm or more.
o
If
the min. stroke is decreased
to 2.5 mm
or
less
for
safety
stitch machines of 50H
or
60H
type, the
top
feed
dog
may
come
in
contact with the upper
looper
holder. It is therefore
necessary to set the min. stroke
to
2.5
mm
or
more
for
the
aforementioned
types
of
machines.
From the Library of Superior Sewing Machine & Supply LLC
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