Moving Up/Down The Pickup Roller Units - Canon DU7-1101-000 Service Manual

2.

Moving Up/Down the Pickup Roller Units

a. Outline
The machine possesses two pick-up roller units, each moving up between its home position and
the top of an original stack for pickup operation. The pickup roller units are moved up and down by
the pickup motor (M3).
The pickup roller stops at either of the following three points, as determined by the output of its
respective sensor or by combinations of sensor outputs and pulses from the pickup motor.
Stop position
Home position Waits until the next copying
run.
Wait position Waits until the next pickup
operation.
Pickup position Picks up an original.
PI 7
Home position
PI 7
COPYRIGHT © 1999 CANON INC.
Operation
Table 2-211
M3
Pickup roller
units
PI 9
PI 8
Wait position
Figure 2-217
CANON ADF FOR iR600 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 OPERATIONS
Sensor (notation)
Pickup roller home position sensor (PI7)
Pickup height sensor 1/2 (PI8/9)
Pickup motor (M3) pulse output
Pickup height sensor 1/2 (PI8/9)
Pickup motor (M3) pulse output
Separation unit
Pickup position
PI 8/9
2-25