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Technology > Image Formation System > Controls > Image stabilization control
Technology > Image Formation System > Controls > Image stabilization control
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D-max control
This control determines optimal developing DC bias, primary charging DC bias, laser power
output.
Execution timing
1) When replacing a drum unit or developing assembly.
2) At every post-rotation after the total reaches 1000 prints.
3) Power ON (High temperature and humidity)and corrects the each color developing DC
bias, primary charging DC bias, laser power output to realize the target density.
Detection details
1) DC controller creates the patch pattern in corresponding color on the ITB.
2) DC Controller measures the patch density with the Patch Sensor (center) (UN49)
Patch sensor
(Center)
(UN49)
Developing
cylinder
Primary
charging roller
Primary charging
DC bias
Laser Power output
Photosensitive
drum
Developing DC bias
Patch image date
DC controller(UN1)
D-max control
ITB
HVT2
(UN17)
HVT1(UN16)
Laser scanner
unit 1/2
F-2-93
Start
Patch pattern is created
Patch scanning
Patch sensor(Center)(UN49)
D-max correction table is created(Y,M,C,Bk)
Developing DC bias,
Primary charging DC bias,
Laser Power output is determined
Vdc
Target
Density
Y3
Y1
Y2
Y10
0
(Y)D-max correction table
DC controller(UN1)
DC controller(UN1)
DC controller(UN1)
F-2-94