Canon imageRUNNER 7095 Service Manual page 131

1. Checking the Presence/Absence of an Original at 2 Points (individual points of detection)
For main scanning direction, the machine identifies the presence/absence of an original with reference to
the CCD output at 2 points (nearest).
Note:
Change in the Signal in Response to ADF Open -> Closed
change present: no
other: yes
The OR argument is applied to the outputs at 2 points.
2. Priority on the Presence of an Original at the Front
If the machine detects the absence of an original at the rear in spite of detection of the presence at the front
for main scanning direction, the machine will identify the size of the original upholding the result of de-
tection at the front.
EX (B5 original)
Point of detection
1
2
3
4
Original size
border line
Near 13-mm point
Near 4-mm point
Original size
border line
F-5-24
Result of movement Result of identification
A B
no no original absent
yes no original present
no yes original present
yes yes original present
(rear)
Point of detection 1
Point of detection 2
Point of detection 3
Point of detection 4
(front)
CCD original detection position
F-5-25
Result of detection
present/absent
present
absent
present
absent
1A = additional
detection point 1
1B = additional
detection point 2
T-5-5
Document size
sensor 1
B5
T-5-6
Result of identification
present
present
present
absent
B5
Chapter 5
5-13