Moving Up/Down The Pickup Roller Unit - Canon DADF-J1 Service Manual

2.4.2 Moving Up/Down the Pickup Roller Unit

a. Outline
The DADF is equipped with two pickup roller units, each designed to move up/down be-
tween home position and the surface of the stack of originals. The pickup roller unit is
moved up/down by the pickup motor (M3).
The pickup roller unit stops at either of the following positions; positioning is controlled
by means of pulses from sensors and the pickup motor.
Stop position
Home position
Wait position
Pickup position
Home position
PI 7
COPYRIGHT © 2001 CANON INC.
Operation
Waits until the next copying op-
eration.
Waits until the next pickup posi-
tion
Picks up originals
T02-204-01
M3
PI 7
PI 9
PI 8
Escape position
F02-204-02
2000 2000 2000 2000 CANON DADF-J1 REV.0 MAR.2001
CHAPTER 2 OPERATIONS AND TIMING
Related sensor (notation)
Pickup roller home position sensor (PI7)
Pickup height sensor 1/2 (PI8/9)
Pulse control of pickup motor (M3)
Pickup height sensor 1/2 (PI8/9)
Pulse control of pickup motor (M3)
Pickup roller units
Separation unit
Pickup position
PI 8/9
2-27