Second Scanner Drive - Ricoh FT4430 Service Manual

3. Second Scanner Drive

To provide the proper optical distance between the original and the lens, this
model uses a stepper motor [A] to move the second scanner. A separate
motor is used because the second scanner must travel a long distance to
accommodate the wide range of reproduction ratios. The single scanner drive
wire provides the second scanner with drive as well as correcting the second
scanner position.
When the second scanner drive pulley [B] turns to change the scanner
position, WP1 and WP2 do not turn. So, the wire clamp [C]
position and only the second scanner pulley [D] moves. When the scanner
drive pulley turns, WP3 does not rotate; however, the second scanner pulley
and the wire clamp do move.
As the second drive motor drives the second drive pulley directly, then the
second scanner can be positioned manually (for maintenance etc.).
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16 April '88
stays at the home