Switching The Paper Size For Two-Sided/Overlay/Reversal Delivery Copies; Movement Of The Paper Size Guide - Canon NP6251 Service Manual

CHAPTER 5 PICK-UP/FEEDING SYSTEM
E. Switching the Paper Size for Two-Sided/Overlay/Reversal
Delivery Copies

1. Movement of the Paper Size Guide

When the Copy Start key is pressed in two-sided/overlay/reversal delivery mode, the
holding tray (X, Y) motor (M8, M9) starts to rotate clockwise, and the paper size guide
plate moves in the direction of the arrow.
The motor (M8, M9) stops when the light-blocking plate of the paper size guide plate
blocks the holding tray (X, Y) home position sensor (PS21, PS20).
The DC controller PCB sends pulses to the motor (M8, M9) according to the size of
copy paper so that the motor rotates in reverse to move the paper size guide plate to suit
the selected copy size and keep it in wait for the arrival of copy paper.
While copying on the second side, the motor (M8, M9) remains at rest until copying
on the first side of the next copy starts.
5-34
COPYRIGHT © 1997 CANON INC.
DC controller PCB
Holding tray
M8
X motor
        
(CW rotation)
(CCW rotation)
Paper size
guide plate
        
Figure 5-614
CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
Holding tray
M9
Y motor
Light-blocking
Trailing edge
PS21
guide plate
PS20
plate