JUKI MF-7900 Series Engineer's Manual page 141

Adjustment procedures
7. Feed timing of the roller
(1) Notch A in collar ❸ aligns with notch B in the puller eccentric
cam ❶ when the roller is placed in the standard position.
When changing the feed timing, loosen two setscrews ❷ in
puller eccentric cam ❶ to adjust. When the cam is moved in
the direction of C, the start of the roller is advanced, and when
it is moved in the direction of D, the start of the roller is de-
layed.
8. Adjusting the clearance between the gear rollers (PL12)
(1) In case of the gear type roller, loosen nut ❺ and adjust the
length of screw ❹ so that the clearance between the top and
the bottom rollers is approximately 0.3 mm in the state that the
rollers are lowered.
Results of Improper adjustment
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