Arcdat Control - Canon imageRUNNER ADVANCE C5045 Series Service Manual

2
Correction value calculation flow for ARCDAT control
Reference data for
example)
ARCDAT of copy pattern
100
INT
40
20
10 40
100
Data output(D-CON)

ARCDAT control

This control obtains ideal gradation characteristics while reducing down time
Execution timing
1) When replacing a drum unit or developing assembly
2) At post-rotation every time the total reaches 25 prints (when continuously making prints,
printing is interrupted for every 100 prints to execute this control)
2
Start
DC controller(UN1)
Reference patch pattern for
ARCDAT is created(3Patch)
Patch sensor(center)(UN49)
Patch scanning
DC controller(UN1)
Output of density data (INT)
Main controller2
Saved as reference
data for ARCDAT
F-2-105 F-2-105
Control details
1) DC Controller creates the patch pattern of each color (Y, M, C, Bk) on the ITB.
(3 patterns per each color, total 12 patterns)
2) DC Controller measures the patch pattern with the Patch Sensor (center) (UN49) and
returns the result to the Main Controller 2.
3) The Main Controller 2 compares the actual measured data with the backed up standard
data for ARCDAT control. Difference after comparison is reflected to D-half result as offset
value.
Laser scanner unit 1/2
Video data
DC controller(UN1)
Density data
ARCDAT Control
2-65
ITB
Patch sensor
(center)
(UN49)
Patch image date
Main controller2
F-2-106 F-2-106
2-65