JUKI MO-6000S series Engineer's Manual page 47

Adjustment Procedures
1) Changing the longitudinal momentum (top feed amount)
of the top feed dog
1 Loosen top feed lock nut 3 and move top feed lever 4 in the
direction of the arrow mark to adjust the stroke.
2 When top feed fine adjustment screw 5 is used, it is possible
to slightly move top feed lever 4.
2) Changing the maximum momentum
1 Loosen setscrew 1 in the differential feed adjustment stopper
and lower the stopper to increase the maximum momentum
and raise the stopper to decrease it.
2 After the adjustment, securely tighten setscrew 1 in the
differential adjustment stopper.
3) Changing the minimum momentum
1 Loosen setscrew 2 in the differential feed adjustment stopper
and lower the stopper to increase the minimum momentum
and raise the stopper to decrease it.
2 After the adjustment, securely tighten setscrew 2 in the
differential adjustment stopper.
Results of Improper Adjustment
™ If the min. stroke is decreased
to 1 mm or less, the components
mounted inside the machine
head may come in contact with
among one another. It is
therefore necessary to set the
min. stroke to 1 mm or more.
™ If the min. stroke is decreased
to 2.5 mm or less for safety
stitch machines of 50H or 60H
type, the top feed dog may
come in contact with the upper
looper holder. It is therefore
necessary to set the min. stroke
to 2.5 mm or more for the
a f o r e m e n t i o n e d t y p e s o f
machines.
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