23
Ricoh Co. Ltd.
http://www.ricoh.com/
B245-62 / PD-C4
Slide 23
Scanner drive motor drives the scanners through timing belts.
1st scanner moves at 100 mm/s; 2nd scanner at 50 mm/s.
See the notes for details.
Scanner Drive
A stepper motor drives the 1st and 2nd scanners [A, B]. The 1st scanner is driven by the
scanner drive motor [C], drive gear through the timing belt [D], scanner drive pulley [E],
scanner drive shaft [F], and two timing belts [G]. The 2nd scanner is driven through the
1st scanner and two timing belts [H].
The BICU controls and operates the scanner drive motor. In full size mode, the 1st
scanner speed is 100 mm/s during scanning. 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 drive motor speed, and in the main scan direction it is done by image
processing on the BICU board.
Magnification in the sub-scan direction can be adjusted by changing the scanner drive
motor speed using SP 4008. Magnification in the main scan direction can be adjusted
using SP 4009.
