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Adjustment Procedures Results of Improper Adjustment
Adjustment Procedures Results of Improper Adjustment
1. Loosen two setscrews 1 and turn spreader ecentric shaft 2
to adjust the height of spreader 3.
™ Turn it clockwise to increase the height, or counterclockwise
to decrease the height.
2. Adjust the clearance from the bottom surface of throat plate 4
to the top surface of spreader 3 is NS : 1.7 mm and NL : 2 mm
at the most advanced position of spreader 3.
3. Holding spreader eccentric shaft 2 so that it does not slip out
from the base, adjust the height.
1. Loosen setscrews 1 in the spreader crank shaft case and
move the case to adjust the backlash. Move the case near the
hook driving shaft to decrease the backlash and move it away
from the shaft to increase the backlash.
™ If the backlash is small, main
shaft torque will increase.
™ If the backlash is large, play of
the spreader will increase.
™ When the backlash is either
small or large, groaning noise of
the gear will occur.
™ If the height is excessively high,
the spreader will come in contact
with the feed dog.
™ If the height is excessively low,
the spreader will come in contact
with the looper or the loop guide.
™ Even if the height is either
excessively high or excessively
low, the hook needle may not
hook thread.
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