Points Of Original Size Detection; Overview Of Detection Operation - Canon iR C2880 Series Service Manual

Chapter 5

5.3.5.2 Points of Original Size Detection

iR C3380i / iR C3380 / iR C2880i / iR C2880 / iR C3580 / iR C3580i / iR C3080 / iR C3080i
The length in main scanning direction is measured by checking the intensify of light at specific points while moving the contact image sensor (CIS) to a point 30
mm from the leading edge of the original. The length in sub scanning direction, on the other hand, is measured by means of the sensors mounted to the following
locations:

5.3.5.3 Overview of Detection Operation

iR C3380i / iR C3380 / iR C2880i / iR C2880 / iR C3580 / iR C3580i / iR C3080 / iR C3080i
Book Mode
1 original (A4R), copyboard cover (or ADF) closed
1) Standby
CIS: in home position
xenon lamp: off
original sensor: off
5-12
AB-Configuration
Sub scanning direction
Butting point
Point of original
detection 1
Point of original
A5
detection 2
Point of original
B5
detection 3
Point of original
detection 4
Original size detection position
30mm
Inch-Configuration
Sub scanning direction
Butting point
Point of original
STMT-R
detection 1
Point of original
detection 2
Point of original
detection 3
Original size detection position
30mm
F-5-17
CIS
point of detection 1
Copyboard cover
point of detection 2
point of detection 3
point of detection 4
Reader unit
CIS HP
F-5-18
Index plate
Original sensor 1
B5R
A4R
B4
A3
A4
Index plate
Original sensor 2
LTR-R LGL
LTR 11" 17"
Original sensor
Copyboard glass
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