2Sequence Of Operation; Sequence Of Operation; 3Controlling The Feed Motor; Controlling The Feed Motor - Canon DADF-M1 Service Manual

Chapter 2

2.6.2 Sequence of Operation

Sequence of Operation (small-size, delivery)
Original placement
sensor
Pickup clutch
Pickup motor
Separation rear
sensor
Registration sensor
Feed motor
Locking motor
Read sensor
Delivery reversal
sensor
Delivery reversal
motor
Pressure solenoid
Image leading edge
signal

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
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*).
2-38
Start key ON
Pickup/Feed
(PI5)
(CL1)
Arching
(M1)
Reversal rotation
(PI7)
(PI1)
(M2)
(M4)
(PI8)
(PI9)
(M3)
(SL2)
:Motor reversal rotation
MODE
RESET
CUT
IC9
+5V
CPU
REF1
REF2
Reading
Normal rotation
F-2-38
+24V
A
3
1
IC4
A*
4
Motor
Driver
B
5
REF
2
B*
6
F-2-39
Delivery
J8
M2
0002-9872
0002-9874