Amplitude Control - Ricoh MP C3004 Field Service Manual

7. Detailed Descriptions
Detection
Result
1
2
3
4
5
Correction Operation Outline
1. The machine corrects the ID sensor output by Vsg adjustment
2. The machine creates the MUSIC pattern on the transfer belt with toner of each color.
3. The machine reads the MUSIC pattern on the transfer belt and detects the positions of the line
patterns.
4. The machine calculates the amount of color registration or skew from the detected positions.
5. The machine determines the correction for the color registration, by calculating the required main
scan magnification shift, main scan magnification deviation, main scan registration shift, skew
correction value, and sub scan registration shift from the detected positions.

Amplitude Control

Outline
• Output quality varies due to the differences among the amplitude of the four motors for each color.
• Phase fluctuation tends to be created during continuous drive because the speed of each motors
differ.
The motors are controlled in order to reduce the phase fluctuation of each color. This system is a solution
for those problems above.
This machine also follows this idea and adopts the method of the predecessors.
1230
Correction Succeeded: Sampling is conducted correctly and the correction is
completed
Sampling Failed (When the MUSIC pattern failed to be detected)
Detection Patterns Lack (When the number of lines detected is smaller than the fixed
number)
The sampled data is beyond the correction range.
(Calculated correction value is just out of rage)
The sampled data is beyond the correction range.
Meaning