The bin home position switch [E] informs the CPU when all the bins are
lowered.
To move the bins up, the bin drive
motor turns clockwise (as viewed from
the front). A timing belt [F] turns the
transfer wheels.
The transfer wheels have two slots in
them 180 degrees apart. As the
transfer wheels turn, these slots
engage the bins and lift them up. Each
time the transfer wheels turn 180
degrees, they raise one bin.
To move the bins down, the CPU
reverses the bin drive motor and the
above processes reverses.
The CPU monitors the position of the
bins through pulses generated by the
wheel switch and the actuator cam [J].
The actuator cam has two flat sides
that are 180 degrees apart and is
mounted behind the rear transfer
wheel. A pulse is generated each time
one of the lobes of the actuator cam
passes the wheel switch.
[C]
[J]
[B]
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A557
STM 9-7 A156/A160/A162
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