62
OR-C2 Training
Slide 62
Scanner Drive
The scanner motor [A] drives the 1st scanner [B] and the 2nd
scanner [C] through the scanner drive pulley, scanner drive shaft
[D], and two scanner wires [E].
In ARDF mode, the scanners always stay in their home position
(the scanner HP sensor [F] detects the 1st scanner). The ARDF
motor feeds the original through the ARDF.
Book mode
The SBU board controls the scanner drive motor. The 2nd scanner speed is half
that of the 1st scanner.
In reduction or enlargement mode, the scanning speed depends on the
magnification ratio. The returning speed is always the same, whether in full size
or magnification mode. The image length change in the sub scan direction is
done by changing the scanner motor speed. In the main scan direction it is done
by image processing on the BCU board.
You can adjust the magnification in the sub-scan direction by changing the
scanner motor speed with SP4-008.
ARDF mode
The scanners always stay in their home position (the scanner HP sensor [F]
detects the 1st scanner) to scan the original. The ARDF motor feeds the original
through the ARDF. In reduction/enlargement mode, the image length change in
the sub-scan direction is done by changing the ARDF motor speed.
Magnification in the main scan direction is done in the BCU board. This is the
same as for book mode.
You can adjust magnification in the sub-scan direction by changing the ARDF
motor speed with SP6-017.
