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1 .Nov. '87
ROLLER DRIVE MECHANISM
4.
The mechanism shown above drives the feed rollers.
Main motor rotation goes to the paper feed drive gear [A] via the timing belt
and an idle gear.
gear [B].
To start paper feed, the CPU turns on the paper feed solenoid. This
releases the ratchet pawl (see the next page) from the paper feed cam [C]
and the paper feed clutch [D] (spring clutch) starts turning the feed roller
shaft. As the paper feed cam turns, it presses up the pick-up roller lever [E],
causing the pick-up roller to lower onto the stack of paper.
The paper feed solenoid is turned on 600 ms after the Start key is pressed.
It is turned
off about 204 milliseconds after the leading edge of the paper
reaches the
registration sensor.
The paper feed drive gear turns the reverse roller drive
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