Canon IMAGERUNNER 2530, Руководство по обслуживанию

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Technology > Original Exposure System > Controls > Detecting the Size of Originals
Technology > Original Exposure System > Controls > Detecting the Size of Originals
Outline of Original Size Detection
- In the BOOK mode
One sheet of original (A4R) is set and the copyboard cover (or ADF ) is closed.
1) Standby state
Original sensor: Turns off.
Reader unit
Copyboard cover
Original sensor 3
Copyboard glass
Original sensor 2A
Original sensor 1
Original sensor 0
2) The copyboard cover opens (at an angle of more than 30 deg).
Original sensor: Turns off.
Original sensor 3
Original sensor 2A
Original sensor 1
Original sensor 0
3) The copyboard cover is closed (at an angle of 30 deg).
Original sensor: Turns on and original size identification process 1 is performed.
30 °
Original sensor 1
Original sensor 0
Original (A4R)
Original sensor 2A/3 Original sensor 0/1
Original sensor 2A
Original sensor 3
●
F-2-18 F-2-18
F-2-19 F-2-19
F-2-20 F-2-20
4) The copyboard cover is closed (at an angle of more than 5 deg but less than 30 deg)
Original sensor: Turns on and original size identification process 2 is performed.
5 °
Original sensor 1
Original sensor 0
Original (A4R)
Original sensor 2A/3 Original sensor 0/1
Original sensor 3
Original sensor 2A
5) The original cover is closed (at an angle of 5 deg or less)
The original size is identified.
Original sensor: Turns off.
In identifying the original size, the data obtained in the original size identification process 1
is compared with the data obtained in the original size identification
process 2 to check whether these two pieces of data are identical.
Note that a wrong original size may be identified because the sensor output level does not
change in the following cases:
- When the original is A3-sized black
- When the original is a book (its thickness does not allow the copyboard cover to close
fully, making it difficult to detect the sensor level change).
- When the copyboard cover is not closed fully (the sensor level change is not detected
after lapse of the above time-out time)
Change absent
Change present
Original sensor 1
Original sensor 0
Original (A4R)
Original sensor 2A
Original sensor 3
F-2-21 F-2-21
F-2-22 F-2-22