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Adjustment Procedures Results of Improper Adjustment
1. Loosen eight setscrews 2 in window plate 1 located on the
rear side and remove window plate 1.
(Caution) After the adjustment, hook the knee lifter link arm
spring on knee lifter link arm spring hook shaft 3
(installed inside) of window plate 1 and install
window plate 1.
2. Loosen two setscrews 5 in feed rock triangle cam 4.
3. In the state that feed rock triangle cam 4 is fixed, turn the
handwheel in the normal rotational direction to retard the feed
timing, or turn in the reverse direction to advance the timing.
4. Install feed rock triangle cam 4 so that the edge of feed rock
rod 6 comes in contact with feed eccentric cam side plate 7
of triangle cam 4.
(Caution) Turn the main shaft and confirm that there is no
unnecessay skew between feed rock rod 6 and
feed eccentric cam side plate 7.
5. Adjust the height of the feed dog to 0.9 to 1.0 mm.
6. Loosen setscrew 9 in feed driving fork end 8 and turn feed
driving fork end 8 in the rotational direction to adjust the height
of the feed dog.
7. Loosen two setscrews !1 in feed driving cam !0.
8. Adjust the timing of feed driving cam !0 to the position where
the top surface of the feed dog is aligned with the top surface
of the throat plate when the top end of the sewing needle is
aligned with the top surface of the throat plate. (Alignment of
three points)
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