Adjustment
Procedures
1) Remove cover O on the rear of the frame and loosen main
feed pin and nut
8.
2) Move main feed pin 8
up
or
down to adjust the differential
feed ratio.
3) Adjust so that the lower engraved marker line on main feed
rocker 8 aligns with the center of nut
8.
(Standard)
4)
When adjusting the maximum stretching, adjust main feed pin
8 to the highest position.
5) When adjusting the maximum gathering, adjust main feed pin
8 to the lowest position.
6) After performing adjustment, tighten the main feed pin and nut
0,
and install cover
O.
1) Remove the cover on the rear of the frame, loosen main teed
bracket clamping
screw
O and ~ifferential feed bracket
. '
..
·
clamping screw
0,
and adjust the clearances provided between
the front and rear ends of the feed dogs and the slots
in
the
throat plates to approximately 0.5 mm. Then tighten main feed
bracket
clamping screw O and differential feed bracket
clamping screw
8.
-27-
Results
of
Improper Adjustment
o
If
the
clearance
provided
between the throat plate and the
feed dog is too small, they will
come
in
contact with each other
when the sewing machine runs
at high speed.
lll
11
II
11
I~
Iii
j
I.
•I
·I
From the Library of Superior Sewing Machine & Supply LLC
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