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26.Feed timing (Fig.32、33、34)
1 Standard position
Turn balance wheel to lower Feed dog A till it
is horizontal with the surface B of throat plate, at
the moment, the tip of needle C should be horizontal
with the surfaces of throat plate and feed dog.
Adjustment can be done by adjusting the position
of feed cam and feed dog lift cam.
2 Installing feed dog lift cam (See Fig.33)
Open the back side cover, turn balance wheel by
left hand counter-clockwise, take Screw A as for
standard, the center of Screw B is slightly a little
lower than the center of Screw A.
3 Insatlling feed cam (See Fig.34)
Continously turn balance wheel, take screw B
as for standard, the center of Screw C is slightly a
little higher than the center of Screw B.
32
A
B
C
33
34
C
B
