Ricoh SP 200 Specifications download pdf (Page 21)

1.2 SCANNER DRIVE

A stepper motor is used to drive the scanner. The 1st and 2nd scanners [A,B]

are driven by this scanner drive motor [C] through the timing belt [D], scanner

drive pulley [E], scanner drive shaft [F], and two scanner wires [G].

– Book mode –

The scanner drive board controls and operates the scanner drive motor. In

full size mode, the 1st scanner speed is 90 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 (M: 0.25 to 4.00). 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 SP4-101. Magnification in the main scan

direction can be adjusted using SP4-008.

– ADF mode –

The scanners are always kept at their home position (the scanner H.P sensor

[H] detects the 1st scanner) to scan the original. The ADF motor feeds the

original through the ADF. In reduction/enlargement mode, the image length

change in the sub-scan direction is done by changing the ADF motor speed.

Magnification in the main scan direction is done in the BICU board, like for

book mode.

Magnification in the sub-scan direction can be adjusted by changing the ADF

motor speed using SP6-007. In the main scan direction, it can be adjusted

with SP4-008, like for book mode.

[E]

[G]

[F]

[C]

[D]

[E]

[A]

[B]

[G]

[H]

A193D546.wmf

SCANNING 1 August 1996

2-2

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 237 238

No comments

Ricoh SP 200 Specifications Page 21