Riso RP-255, Technical Manual

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FB ORIGINAL SCANNING SECTION
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3. Flatbed Initialization Movement
Initialization is performed in the following situations to bring the flatbed unit to standby mode.
• When power is switched on
• When everything has been reset
Initialization operation
The FB/AF HP sensor [A] is checked; if it is ON (light blocked), the flatbed read pulse motor [B] rotates
in the feed direction until the sensor turns OFF (receives light), and moves the lamp carriage [C] to the
right in the photograph. When the FB/AF HP sensor turns OFF, the flatbed read pulse motor rotates in
the return direction and, after the FB/AF HP sensor switches from OFF to ON, the motor operates for a
distance of 8 mm before its operation stops. (This position is referred to as the “home position.”)
If the FB/AH HP sensor is OFF at the time of operation start, the flatbed read pulse motor rotates in the
return direction to move the lamp carriage a distance of 8 mm (if the FB/AF HP sensor turns ON during
this operation, the above-described operation, which is carried out when the sensor is ON at the time of
operation, starts), then the flatbed read pulse motor moves in the feed direction by a distance of 8 mm.
Then, the flatbed read pulse motor rotates in the return direction and, after the FB/AF HP sensor
switches from OFF to ON, the motor operates for a distance of 8 mm before its operation stops.
When the power switch is ON, the initialization operation is conducted, then offset adjustment and gain
adjustment are performed. Then, the operation to be conducted when the sensor is OFF at the time of
operation start is performed, and the initialization operation ends.
A: FB/AF HP sensor
B: Flatbed read pulse motor
C: Lamp carriage
B C
A
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