JUKI LK-1910 Engineer's Manual page 11

Adjustment Procedures
1) Push counterweight 1 to main shaft front bushing 2, insert a
clearance gauge of 0.5 mm between main shaft intermediate
bushing 3 and thrust collar A 4 and fix thrust collar A 4 with
screw while pressing it to main shaft intermediate bushing 3
side.
2) Remove the clearance gauge and fix thrust collar B 5 so as to
lightly insert main shaft intermediate bushing 3 between thrust
collar A 4 and thrust collar B 5.
1) Making the clearance between servo motor 1 and the coupling
0.5 mm, fit screw No. 1 4 to the flat section. Then install the
motor.
2) Insert rubber ring 3 (RO1524240100) between main shaft rear
bearing 2 and the coupling. making the clearance between
the main shaft rear bearing and the coupling 2.5 mm, fit screws
No. 1 4 to the flat section. Then install the motor.
(Caution) When engaging the respective couplings, be sure
to align the two positions of the screws in the
direction of rotation.
Results of Improper Adjustment
™ If the position of the couplings is
not correct, the main shaft does
not stop at the normal angle.
™ If the installing clearance of the
couplings is plus, the moving
clearance of the couplings in the
axial direction is lost, and a
torque is applied to the main
shaft.
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