Canon DADF-H1, Руководство по обслуживанию

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CHAPTER 2 OUTLINE OF OPERATION
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
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2.3 Document Set Detection
2.3.1 Overview
This ADF detects whether a document is set or not in two ways, depending on the print
mode.
• Normal printing (other than printing of documents of different sizes adhering to differ-
ent systems and long-document mode)
• Printing of documents of different sizes adhering to different systems, long-document
mode
a. Normal printing (other than printing of documents of different sizes adhering to
different systems and long-document mode)
The following four document detection functions are operable during printing:
Function
Document presence/
absence detection
Last document detec-
tion
Initial document size
detection
• Feed direction
• Width direction
Final document size
detection
• Feed direction
Contents
Detecting the presence or absence of a
document in the document pickup tray
Detecting whether the document being
fed is the last document or not
Detecting the length of a document set
in the document pickup tray
Small and large size identification
LTRR and LGL identification
Detecting the width of a document set
in the document pickup tray
Detecting the length of a document in
the feed path in the feed direction
Sensor (Symbol)
Document set sensor (PI10)
End-of-document sensor (PI1)
Document length sensors 1/2
(PI3/PI4)
Document width detection vari-
able resistor (VR1)
A4R/LTRR identification sensor
(PI2)
Read sensor (PI7)
T02-203-01