Main Motor Control - Ricoh C217 Service Manual

5.3 MAIN MOTOR CONTROL

The main motor is driven by the main motor control PCB. The main PCB
sends the speed signals (0 and 1), the main motor ON trigger, and the motor
brake trigger to the main motor control PCB. According to the combination of
two speed signals, the main motor control PCB can select on to of four
possible main motor speeds.
The main motor speed is converted in half for the drum rotation by the gears
and timing belt. The drum rotates at 30rpm while the main motor rotates at
60rpm. This lowest possible speed also is used for the master eject and feed
operations. For the master wrapping process, the main PCB sends the main
motor ON trigger as a pulse signal. As a result, the drum turns intermittently
at 30rpm.
The main motor speed is maintained by the main motor control PCB which is
monitoring the encoder pulses from the main motor.
CN108-4 (Speed 1)
CN108-5 (Speed 0)
Motor Speed
Drum Speed
SM
L L
L H
60 rpm 140 rpm 200 rpm
30 rpm 70 rpm 100 rpm
2-23
H H
L H
260 rpm
130 rpm
C217