Controlling The Scanner Motor - Canon iR5055 Series Service Manual

Chapter 5
[1] Scanner Motor M501 Drive Signal
starts/stops the motor; controls the direction and speed of its rotation
[2] Scanner HP Detection Signal
detects the presence of the No. 1 mirror base at home position

5.3.1.2 Controlling the Scanner Motor

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N
The configuration of the system used to control the scanner motor is as follows; the motor driver on the interface PCB operates according to the signals from the
CPU to start/stop the scanner motor and to control the direction and speed of its rotation
1. Reverse Movement After a Scan
After an image scan, the No. 1 mirror base is moved in reverse as far as the shading position at 234 mm/sec regardless of the selected magnification.
2. Forward Movement During a Scan
During an image scan, the No. 1 mirror base is controlled at the speed indicated in the following figure; the No. 1 mirror base is moved forward at 325 mm/sec for
100% magnification.
5-6
[1]
Reader
Interface
controller
PCB
[2]
PCB
Reader controller PCB
J202
J203
[1]
CPU
[1] Scanner motor control signal
Start
Image leading edge
position
HP
Acceleration
Shift
speed
[1] [2]
Shift distance
[1] Acceleration interval: accelerates up to scan speed
[2] Run-up interval: run-up margin used to ensure stable speed
[3] Image read interval: segment over which images are read
[4] Deceleration interval: at the image trailing edge, decelerates and stops as soon as possible
Scanner motor
Light-blocking plate
(forward)
(reverse)
Scanner
HP sensor
No.2 mirror
base
F-5-9
Interface PCB
+24V/15V
J308
J307
A
A*
Motor
B
driver
B*
F-5-10
Image trailing edge
Constant speed
[3]
F-5-11
Scanning
lamp
No.1 mirror base
Scanner
motor
J306
M501
3
1
4
5
2
6
Stop
Deceleration
[4]
0015-4389