Original Set - Ricoh FT8880 Service Manual

RDH 5 June 1992

16.2 ORIGINAL SET

16.2.1 Stack Feed Mode
[D]
[E]
[A]
[C]
[B]
[F]
[H]
[G]
1. Original set detection
The originals are detected by the original set sensor [A] when they are
stacked on the original table.
2. Size detection
The original width is detected by the original width sensor [B] under the front
original guide [C]. Moving the guide changes the value of the sensor. (The
sensor is a potentiometer.) The front original guide and rear original guide [D]
are moved by the racks [E] and pinion [F] at the same time. The actuator [G]
of the original stopper activates the original length sensor [H]
(photo-interrupter) to detect if the original stopper is set for the 8 inch
1/2
position. LG (8 " x 14" = 216 x 356 mm) or B4 (257 x 364 mm) size is
1/2
distinguished by the combination of the original length sensor (activated or
not) and the value of the original width sensor. This is because the LG and
B4 widths are very close.
2-8