Canon Vizcam 1000, Руководство по обслуживанию

Страница: 127 / 840

COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-83
3. OPERATION AND TIMING
6. Correcting a Discrepancy in the
Sub Scanning Direction
If the coordinates of centers in the pattern are
different (in Figure 3-437,
∆
X is not 0), the image
start position in the sub scanning direction is likely
to have a discrepancy. Correction is made so that
∆
X will be closer to 0. (In the case of Figure 3-437,
the Y start position will be advanced until it is the
correct position.)
Figure 3-437
The correction is made by varying the read enable signal for the Y, C, and Bk video signals (T2 of Figure
3-438). In the case of Figure 3-437, T2 is extended to delay the timing for the Y image start.
Figure 3-438
Feeding direction
Y
∆
X
Correct center
Image leading signal (ITOP)
Y read enable signal (YMRE)
Y print enable signal (YPE)
Y print area signal (YFRM)
Paper length (feeding direction)
Image area
1st page
T2