Controlling The Feed Motor - Canon DADF-M1 Service Manual

2.6.3 Controlling the Feed Motor

The following is a diagram of the circuit used to control the feed motor (M2). The feed
motor (M2) is a 4-phase stepping motor, and the circuit has the following functions:
- turning on/off the motor
- changing the rotation direction of the motor
- changing the rotation speed of the motor
CLK
MODE
RESET
CUT
IC9
CPU
REF1
REF2
ADF driver PCB
The CPU (IC9) on the ADF driver PCB receives data (command) from the host machine
on printing mode (magnification, operation mode, timing); in response, it generates drive
pulses to drive the feed motor (M2). The feed motor (M2) is a stepping motor, and its
direction and speed of rotation are changed by changing the order of drive pulses (A, A*,
B, B*).
IC4
Motor
+5V
Driver
REF
F-2-39
+24V
J8
A
3
1
A*
4
B
5
2
B*
6
Chapter 2
0002-9874
M2
2-45