Document Detection; Overview - Canon DADF-M1 Service Manual

2.3 Document Detection

2.3.1 Overview

The machine possesses the following 2 modes of operation to suit different printing modes:
a. normal mode (other than mix of different configurations or extra-length)
Item
Presence/absence
of original
Original size identification
Feed direction
Moving the 1st sheet.
Arching the 2nd sheet.
Turing over the 1st sheet.
Arching the 2nd sheet.
Moving the 1st sheet.
Idly moving the 1st sheet.
(while locking the platen
upstream roller locked in place)
Moving the 2nd sheet.
F-2-16
T-2-3
Description
checks the presence/absence of an original in the original pickup tray. original placement
monitors the state of the post-separation sensor (on/off) after the read
sensor goes on to identify the original as being small or large.
checks the length of the original placed in the original pickup tray;
identification of LTR and LGL.
Delivering the 1st sheet.
Idly moving the 2nd sheet.
Sensor used
(notation)
sensor
post-separation sensor,
read sensor
LGL sensor
Chapter 2
0002-7374
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