Drum Drive Mechanism - Ricoh C231 Service Manual

6.8.2 DRUM DRIVE MECHANISM

[D]
Mechanism
Main motor [A] (dc motor)
↓
Belt [B]
↓
Gears [C]
↓
The drum rotates.
NOTE: 1) The main motor encoder sends pulses to the main motor control board
(1020 pulses = 360 degrees).
2) The CPU monitors the pulses and controls the drum speed and stop
positions.
3) The drum has two sensors;
• Master eject sensor [D] (master eject position and drum home
position)
• Feed start timing sensor [E]
4) The drum has two stop positions;
• Master eject (drum home) position
• Master feed position (feed start timing sensor + 102 pulses)
[E]
[A]
[C]
C267D012.WMF
[B]