4Controlling The Pickup Motor (M1); Controlling The Pickup Motor (M1); 5Controlling The Lock Motor (M4); 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
ADF driver PCB
IC9 on the ADF driver PCB receives print data (command) on printing mode from the host machine (magnification,
operation mode, timing); in response, it generates 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:
2-32
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
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
Reading
M1
0002-9497
0003-6080