– 31 –
Adjustment Procedure
Results of Improper Adjustment
1. Turn the stitch dial
clockwise while moving the reverse feed lever
up and down until the feed adjusting pin
meets the section A
of the feed adjusting belt
. At that time, the feed adjusting pin
and the feed adjusting belt
cannot be observed. The above-
mentioned adjustment allows the operator to feel by hand that the
reverse feed lever
will no longer come down.
2. Make sure that the marking (chamfered) on the feed adjusting ec-
centric pin
faces in the same direction as the slot in the feed
adjustment change arm
.
3. Loosen the drain cock
and expel the oil from the drain opening.
4. Remove the top cover
of the bed.
5. Loosen the set screw
of the feed adjustment change arm
.
6. Turn the hand-wheel in the normal direction of rotation to adjust the
feed change belt
so that the feed amount of the feed dog is set
to zero (0).
7. Fasten the clamping screw
in the feed adjustment change arm
.
(Caution)
Fasten the screw
with a tightening torque of 3.43 to
4.41N•m (35 to 45 kgf•cm).
8. Supply oil to the machine. (Check it through the oil sight window
.)
9. Loosen the set screw
of the stitch dial
.
10. Align zero (0) on the scale of the stitch dial
with the marking
on feed aperture plate
of the front face of the machine.
11. Fasten the set screw
of the stitch dial
.
o The actual stitch length will
greatly differ from the value set
on the stitch dial
.
6’ When the feed change belt
is
tilted in the direction of arrow C,
the feeding amount in the nor-
mal direction will increase. When
the feed crank stud is tilted in the
direction of arrow D, the feeding
amount in the reverse direction
will increase.
8’ Supply oil from the oil port
while checking the oil level
through the oil sight window
.
The amount of oil is sufficient
when level H is reached.
11’ At that time, take care not to al-
low the marking
to shift from
the zero (0) point on the scale of
the stitch dial
.