Sequence Of Operation; Controlling The Delivery Reversal Motor (M3); Document Feeding/Delivery; Basic Sequence Of Operation - Canon DADF-M1 Service Manual

Chapter 2
c. Reversing/Moving the Original 2
The machine rotates the feed motor in normal direction and the delivery reversal motor in reverse to move sheets at the same time. The machine stops the delivery
reversal motor when the originals have moved a specific distance. The machine then drives the lock motor for a specific number of pulses to lock the platen upstream
roller in place.

2.5.2 Sequence of Operation

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

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
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*).

2.6 Document Feeding/Delivery

2.6.1 Basic Sequence of Operation

a. Moving the Originals
The machine turns on the locking solenoid before the trailing edge of the original leaves the platen downstream roller to lock the delivery reversing roller in place.
2-28
Reversing roller
No. 2 registration roller
M2 M3
Read roller 1
Read standing by position
Start key ON
Pickup/feed
(PI5)
(CL1)
Arching
(M1)
(PI7)
(PI1)
(M2)
(M4)
(PI8)
(PI9)
(M3)
(SL2)
:Motor reversal rotation
B*
A*
A
B
IC9
+5V
CPU
REF1
REF2
ADF driver PCB
F-2-33
Reading
Reversal standing
Normal rotation
F-2-34
+24V
J10
A
8
3
IC1
A*
7
Motor
Driver
B*
6
REF
4
B
5
F-2-35
Reversal
Arching
Reversal rotation
M3
0002-9821
0002-9898
0002-9828