Controlling The Delivery Reversal Motor (M3) - Canon DADF-M1 Service Manual

Chapter 2

2.5.3 Controlling the Delivery Reversal Motor (M3)

The following is a diagram of the circuit used to control the delivery reversal motor (M3).
The delivery reversal motor (M3) is a 4-phase stepping motor, and the circuit has the
following functions:
- turning off/on the motor
- controlling the rotation direction of the motor
- controlling the rotation speed of the motor
B*
A*
A
B
IC9
CPU
REF1
REF2
ADF driver PCB
The CPU (IC4) on the ADF driver PCB receives data (command) from the host machine
on print mode (magnification, operation mode, timing); in response, it generates drive
pulses to drive the delivery reversal motor (M3). The delivery reversal motor (M3) is a
stepping motor, and the direction and speed of rotation are changed by changing the order
and frequency of drive pulses (A, A*, B, B*).
2-42
IC1
Motor
+5V
Driver
REF
F-2-35
+24V
J10
A
8
3
A*
7
B*
6
4
B
5
0002-9898
M3