CHAPTER 2 OUTLINE OF OPERATION
COPYRIGHT © 2001 CANON INC.
2000 2000 2000 2000
CANON DADF-H1 REV.0 MAR. 2001
2-19
2.3.4 Initial document size detection (feed direction)
Initial document size detection (feed direction) uses document length sensor 1 (PI3) and
document length sensor 2 (PI4) to detect the size in the feed direction of a document set in
the document tray.
When a document is placed in the document tray, the detection levers in the two docu-
ment length sensors work in synchronization with the shading plate to cover the
photointerrupter. Document size information detected on the basis of the combination of
the signals (LENG1S/LENG2S) from these two document length sensors is transmitted to
the host.
Document size information is detected on a real-time basis and transmitted to the hosts at
10 msec intervals. T02-203-03 summarizes the relationships among each document length
sensor signal, the document width, and the results of document size detection.
F02-203-02
ADF controller PCB
Document
Detection lever
Detection lever
PI4
PI3
LENG2S
LENG1S
Summary of Contents for DADF-H1
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