JUKI MOL-254 Engineer's Manual page 21

Adjustment Procedures
① Loosen setscrew
.
② Perform the adjustment of the backlash by turning thrust
collar (large) in the direction of the arrow mark while making
the collar (large) closely come in contact with face A on
the machine bed. Adjust the gap of the backlash so that
the gap is 0.1 mm or less at the top end of the shuttle
driver and the gear smoothly rotates.
③ Tighten setscrew
.
(Caution) Be sure to keep the direction as shown in the
figure with regard to the direction of rotation
when removing the backlash.
Play in the axial direction
Loosen two setscrews
setscrews in the state that the hook driving shaft is pressed
in the direction of the arrow mark.
in the thrust collar and tighten the
14
−
Results of Improper Adjustment
○ If the backlash is too large, hook
noise will be increased.
○ If the backlash is too small,
seizure of the oscillator or main
shaft crank will result.
○ If the longitudinal position of the
os c i l l a t or i s s hi f t ed w h en
adjusting the backlash, seizure
of the oscillator or main shaft
crank will result.
−