Original Feed Mechanism - Ricoh C217 Service Manual

2.2 ORIGINAL FEED MECHANISM

[A]
[B]
[D]
[C]
13 mm
34 mm
The originals on the original table are detected by the original set sensor [A].
A photo-transistor [B] in the upper position and an LED [C] in the lower
position make-up the original registration sensor.
After the master on the drum is ejected to the master eject box, the original
feed motor (stepper motor) starts rotating to feed the original to the exposure
glass [D]. When the original is transported 13 mm past the original
registration sensor, the original feed motor stops. At this time the original
leading edge is aligned with the CCD scan line on the exposure glass. Then
the original feed motor starts again synchronizing with the master feed.
The original pick-up roller keeps turning after the original trailing edge
passes the roller, so if a 2nd original is present, it will be fed directly after the
trailing edge of the 1st original.
After the 1st originals trailing edge is detected and transported 12 mm past
the original registration sensor, the original set sensor checks whether the
next original is present. If no original is detected, after the original trailing
edge passes the original registration sensor, the original is transported
further 35 mm (34+1) and fed out. If the next original is detected, the
originals are transported 1 mm further to align the 2nd original leading edge
with the scan line (the 2nd original has been transported a total of 13 mm
from the original registration sensor), then the original feed motor stops.
After printing of the 1st original is completed, the original transport motor
starts again for the next original.
C217 2-6 SM