Bin Drive Mechanism - Ricoh A156 Service Manual

3.3 BIN DRIVE MECHANISM

[A]
[A]
[B]
[C]
[D]
The bin drive mechanism moves the bins up and down to receive copies.
There are four pins on each bin. Two pins fit into the slots [A] in both the
front and rear side frames; the pins slide up and down in these slots. The
other two pins fit into the slot in the helical wheels; as the helical wheels turn,
these pins move up and down, and the other pins move up and down in the
slots at the other end of the bin.
The bin drive motor [B] drives the helical wheels through four timing belts
[C]. When the motor rotates clockwise, the bins lift; when it rotates
counterclockwise, the bins lower. There is a wheel sensor actuator [D] on the
front helical wheel; the actuator has a slot which detects when the helical
wheel has rotated once.
When the bins are advanced, the helical wheels rotate once for each step.
As the pitch of the spiral on the helical wheel is greater when the bins are at
the staple and paper exit area than when the bins are elsewhere, the amount
of bin shift is greater when the bins are at the staple and paper exit area.
This leaves enough space to staple and stack the copies. Also, this reduces
the total machine height.
A156/A160/A162 7-10 STM