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CF5001 Ver.1.0 Sep. 2003 WRITE
2-17
II UNIT EXPLANATION
2. Detecting the color registration mark
PS8 and PS9 detect the edge of the color registration mark " " for each color and convert to digital sig-
nals. The edge detection for one " " is performed at four positions.
3. Calculating and correcting the color drift amount
The transfer belt rotates to record the passage time for each color registration mark. The passage time is
determined by the clock signal count corresponding to the detection edge of each registration mark as
shown below. The detected values from PS8 and PS9 are recorded individually.
[1] Direction of the edge detection (direction of
image)
[4]
[5]
Color registration sensor /F, /R (PS8, PS9)
Color registration mark
[2] Binarized digital signals
[3] Detection signal of the color registration sen-
sor /F, /R (PS8, PS9) (analog signal)
[1] Direction of the edge detection (direction of image)
[2] Address number of the detected edge
[3] Clock signal count value corresponding to the address for each detected edge
[4] Clock signal [5] Binarized digital signals
8050ma2057
[1]
[2]
[3]
[4] [5]
8050ma2058
[1]
[3]
[2]
[5]
[4]
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180 330
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