Drum Rotation Mechanism - Ricoh C226 Service Manual

DRUM SECTION

7.2 DRUM ROTATION MECHANISM

[G]
[H]
[F]
[E]
[A]
[D]
[I] [C]
[B]
[J]
The main motor (DC motor) [A], located under the rear side plate, will rotate
the drum in either the clockwise or counterclockwise direction by means of
belt [B], gears [C] [D], belt [E], and pulley [F].
The drive mechanism uses helical gears, which rotate more quietly. Gear [H]
at the rear of the machine and gear [G] at the rear end of the drum unit have
special grooves that will prevent the gear [G] from engaging gear [H] if gear
[H] is not at the correct position.
Pulse disk [I] and sensor [J] on the main motor shaft is used to check the
drum rotation speed.
When the drum is at the original stop position (home position), the drum
actuator will interrupt the first drum position sensor and the drum unit can be
pulled out from the machine.
SM 2-55 C226