Controlling The Pickup Motor (M1); Controlling The Lock Motor (M4) - Canon DADF-M1 Service Manual

Chapter 2
Original placement
Original placement
sensor
Pickup clutch
Pickup motor
Separation rear
sensor
Registration
sensor
Feed motor
Release motor
Read sensor
Image leading edge
signal

2.4.4 Controlling the Pickup Motor (M1)

The following is a diagram of the circuit used to control the pickup motor (M1). The pickup motor is a 4-phase stepping motor, and the circuit serves the following
functions:
- turning on/off the motor
- controlling the rotation direction of the motor
- controlling the rotation speed of the motor
IC9 on the ADF driver PCB receives print data (command) on printing mode from the host machine (magnification, operation mode, timing); in response, it gen-
erates drive pulses to drive the pickup motor.
The pickup motor (M1) is a stepping motor, and its direction and speed of rotation are varied by changing the order and the frequency of drive pulses (A, A*, B, B*).

2.4.5 Controlling the Lock Motor (M4)

The following is a diagram of the circuit used to control the lock motor, and the circuit has the following function:
- turning on/off the motor
- controlling the speed of motor rotation
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 lock motor.
The lock motor (M4) is a stepping motor, and the direction and speed of its rotation are changed by changing the order and frequency of drive pulses (A, A*, B, B*).
2-26
Start key ON
Pickup/feed
(P15)
(CL1)
(M1)
Reverse rotation
(PI7)
(PI1)
(M2)
(M4)
(PI8)
:Motor reverse rotation
MOT-B*
MOT-B
MOT-A*
IC9
CPU
MOT-A
MOT-CUT
MOT-REF1
MOT-REF2
ADF driver PCB
MOT-A
MOT-B
MOT-CUT
+5V
IC9
CPU
MOT-REF
MOT-REF
ADF driver PCB
Arching
Normal rotation
F-2-28
+24V
J11
A
3
IC8
1
Motor
A*
4
Driver
B
5
+5V
2
B*
REF
6
F-2-29
J9
B*
6
IC2
B
5
Motor
Driver
A*
REF
4
A
3
3
F-2-30
Reading
M1
M4
0002-9497
0003-6080