Fig. 4-108 Copy Selector Operation (C); Fig. 4-109 Copy Selector Operation (D) - Canon NP-70 Service Manual

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e) When the copyboard returns, the selector advance lever is depressed and the ratchet drive
plate is pushed to the left. As it moves, the drive plate pushes the counter pawl against
the disengaging stud, freeing the pawl from the ratchet wheel. The wheel, however, re-
mains stationary due to the holding action of projection A of the release arm (see Fig.
41.06). These combined actions can be seen clearly in Fig. Fig. 4-108).
Pawl Drive Plate
Counter Pawl
Ratchet Wheel
Disengaging Stud
Fig. 4-108 Copy Selector Operation
(CJ
f) The back and forth motion of the copyboard will cause the copy selector to advance one
position for each copy made. As the last copy is started, the release arm trip projection
on the ratchet wheel lifts the release arm. The action, thus, frees the start shaft and
microswitch MS7.
Backward Movement
Pawl Drive Plate
Counter Pawl
Start Shaft
Release Arm Trip
r ~ ~ Forward Movement
Projection A Release Arm
Fig. 4-109 Copy Selector Operation (DJ
© CANON INC.
Second Printing-June, 7974