Canon imagePRESS C1 Service Manual - page 381
Chapter 7
7-32
C and Bk, measurements are performed while printing the second document, and the results will be reflected in the third printed document. In the case of 2-image
print, patch pattern measurement results of Y and M will be reflected not in the second but the third printed document as data processing takes more time.
F-7-37
7.4.15 ARCDAT Control
0020-4154
imagePRESS C1+ (Printer) / imagePRESS C1+
ARCDAT control regulates the gradation correction in the main controller in order to achieve desired gradation characteristics.
Start-up Conditions
- Performed sheet-to-sheet
Description
Main controller outputs the patch data of each color (L, Y, M, C, Bk) at the DC controller sheet-to-sheet. DC controller produces patch patterns of each color (L,
Y, M, C, Bk) on the drum based on this data. (The total of 5 patterns, 1 pattern for each color.)
Subsequently DC controller measures patch patterns with the patch image scan sensor (PS4, PS76) and sends the results back to the main controller. Main controller
then measures the obtained data up against the backup of ARCDAT standard data. Main controller reflects the differences found between the two data as the offset
value in D-Half results and then in the next page.
A4 Full Color
The gradation table for Y is corrected.
On the drum
Y
Y
M
M
C
1st page
C
Bk
Bk
Corrected data is reflected.
2nd page