Controlling The Scanner Motor; Enlargement/Reduction; Changing The Magnification In Main Scanning Direction; Changing The Magnification In Sub Scanning Direction - Canon imageRUNNER 5065 series Service Manual

Chapter 5

5.3.1.2 Controlling the Scanner Motor

iR5065 / iR 5055 / iR5075 / / /
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.
ERROR CODE:
E202 (HP detection error)
-0001: when the No. 1 mirror base is moving forward, it fails to reach the HP sensor within a specific period of time
-0002: when the No. 1 mirror base is moving in reverse, it fails to reach the HP sensor within a specific period of time
SERVICE MODE:
COPIER>ADJUST>ADJ-XY>ADJ-X (scanner image leading edge position adjustment)
Enter a value to adjust the image leading edge position.
settings range: 0 to 2970 (a change of '12' causes a shift of 1 mm)
COPIER>AJST>ADJ-XY>ADJ-S (scanner home position)
Do not change the setting.

5.3.2 Enlargement/Reduction

5.3.2.1 Changing the Magnification in Main Scanning Direction

iR5065 / iR 5055 / iR5075 / / /
To change the magnification in main scanning direction (for both platen and ADF modes), the machine reads the image at 100% and applies appropriate image
processing in the main controller block.

5.3.2.2 Changing the Magnification in Sub Scanning Direction

iR5065 / iR 5055 / iR5075 / / /
To change the magnification in sub scanning direction, the machine changes the speed at which it moves the scanner/original.
For reduction, the machine also performs image data skipping (on main controller PCB and reader controller PCB).
[1] In platen mode, the machine changes the speed at which the mirror base is shifted for a ratio between 25% and 400%.
5-6
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
Interface PCB
+24V/15V
J308
J307
A
A*
Motor
B
driver
B*
F-5-10
Image trailing edge
Constant speed
[3]
F-5-11
Scanner
motor
J306
M501
3
1
4
5
2
6
Stop
Deceleration
[4]
0015-4389
0015-4391
0015-4393