Specifications

2001 CANON INC. 2000 2000 2000 2000 CANON DADF-J1 REV.0 MAR.2001

CHAPTER 2 OPERATIONS AND TIMING

2-20

The registration roller clock sensor (PI5) is used to measure the length of originals with

reference to the revolutions made by the clock plate mounted to the slave roller of the regis-

tration roller. Based on the revolutions of the lock plate, the ADF controller PCB identifies

the length of the original in question (in feeding direction).

F02-203-05

The DADF uses the data on the width and the length of the original obtained by original

detection 2 to identify a default size, and sends the result to the copier. In response, the

copier selects the appropriate copy paper size to suit the identified size of the original.

ADF controller PCB

Slave roller

Registration roller

Clock plate

Registration roller

clock sensor (PI5)

TRCLK