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5. Scanner Operations in Page Separation Mode (non-AE, page separation, A4, 2
copies)
Figure 3-304
I, II, and III shown in Figure 3-108 are controlled by the microprocessor on the DC
controller PCB with reference to the scanner home position signal (falling edge of SCHP)
of the first original.
The microprocessor determines the distance to be traveled by the scanner according
to the size of the selected cassette.
I, II: The distance traveled by the scanner is determined by the reproduction ratio and
cassette size.
III: The copier does not have a mechanism that detects the size of originals; for this
reason, control for page separation is exerted with reference to the size of the
cassette.
If the distance traveled by the scanner forward (II in Figure 3-304) exceeds 216 mm
(approx.), the copier assumes a point corresponding to 216 mm to be the leading
edge of the second page.
The size of originals is checked only if an ADF (accessory) is installed.
The microprocessor identifies the result of dividing the identified size by 2 as the
center of the original and operates the scanner assuming that the center represents
the leading edge of the second original.
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 3 EXPOSURE SYSTEM
3-8