Picking Up And Moving Originals - Canon SmartBase PC1200s Service Manual

CHAPTER 4 OPERATION

9.2 Picking Up and Moving Originals

9.2.1 Outline
The ADF picks up and moves originals under the control of the CPU on the host
machine's image processor PCB and using the drive of the ADF motor (M3).
When the host machine's Start key is pressed, with an original placed in the original tray,
the ADF motor starts to rotate counterclockwise and the pickup roller moves down to move
up the original stopper. At the same time, the original pickup roller and the original separa-
tion roller start to rotate.
When the original pickup roller and the original separation roller rotate, a single original
is separated by the work of the original separation roller and the original separation pad, and
its leading edge is detected by the registration sensor. The original is then sent as far as the
ADF registration roller; a specific period of time after the registration sensor detects the
leading edge, the ADF motor starts to rotate clockwise to move up the original pickup roller
and move down the original stopper.
The ADF motor rotates clockwise to rotate the ADF registration roller, white roller, origi-
nal feed roller, and original delivery roller to move and deliver the original.
ON when ADF motor rotates CCW
ON when ADF motor rotates CW
pickup roller
ADF motor
4-42
COPYRIGHT © 2001 CANON INC.
Original
Original stopper
ADF registration roller White roller
F04-902-01
2000 2000 2000 2000
Original separation roller
CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001
Original delivery roller
Original feed roller