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1.
While the cylinder
motion. While it is protruded, the knife bar remains in the state of
stop.
2.
While this cylinder
Link A
coincides with that of Screw A
3.
If no coincidence is perceived, loosen the nut
screw
and adjust the adjusting screw
the shaft centers coincide with each other. When coincidence is
secured, fix the nut
1.
Timing adjustment of the needle and hook
(1) Remove the throat plate. When the needle is raised by 3.5mm from
the lowermost point (needle bar engraved line alignment), let the
blade points of the right and left hooks coincide with the needle
centers. At that time, the clearance between the needle side surface
and the hook holder
the needle side surface and the blade point shall be 0 to 0.03mm,
and the distance between the upper end of the needle hole and the
blade point shall be 1.3±0.2mm.
2.
Adjustment of hook timing
(1) Loosen three setscrews
and turn the hook. When the needle center coincides with the blade
point, tighten the setscrews
should be tightened in the specified order. To avoid the occurrence
of vertical rattling in the hook shaft, try to tighten the setscrews
while the hook is pushed down and the small gears are somewhat
raised.
(2) Check whether the main shaft torque is applied after adjustment of
the hook timing.
Adjustment Procedures
is withdrawn, the knife bar is in the state of
is protruded, confirm that the shaft center of
.
Adjustment Procedures
shall be 0 to -0.05mm, the clearance between
of small gears located on the hook shaft
. In this case, the three setscrews
.
of the adjusting
to the position where
– 14 –
Results of Improper Adjustment
Results of Improper Adjustment
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