Controlling The Reversal Motor (M1) - Canon DADF-R1 Service Manual

Chapter 3

3.6.6 Controlling the Reversal Motor (M1)

The following is a diagram of the circuit used to control the reversal motor (M1), which is a 4-phase stepping
motor. The circuit has the following functions:
- turning off/on the motor
- controlling the direction of motor rotation
- controlling the speed of motor rotation
IC18
CPU
B9
[1]
[1] ADF controller PCB
[2] reversal motor drive PCB
M1: reversal motor
PI5: reversal motor clock sensor
The CPU (Q18) on the ADF controller PCB sends various motor control signals to the reversal motor driver
PCB, which in turn controls the motor as dictated by these signals.
Signal
name
INA
INB
IN_A
IN_B
T-Vref
3-54
J6 J71
+5R
1 13
IN_B
2 12
IN_A
3 11
INB
4 10
INA
5 9
T-Vref
6 8
+24R
7 7
8 6
9 5
10 4
11 3
12 2
13 1
[2]
J14
Description
phase control (direction and speed of rotation)
phase control (direction and speed of rotation)
phase control (direction and speed of rotation)
phase control (direction and speed of rotation)
motor rotation torque setting
+24U
A*
3
1
A
4
IC601
B
6
2
B*
5
TRCLK
F-3-113
T-3-12
J602
M1
0013-3516
PI 5