Calibration
The product calibrates itself to print a high-quality image. The calibration corrects a color-misregistration
and color-density variation caused by environment changes or variation inherent in the product. The
product performs the following calibrations:
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Color-misregistration control
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Environment change control
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Image stabilization control
Color-misregistration control
The color-misregistration control corrects the misaligned color planes caused by the variation inherent in
the laser/scanner units or cartridges. The color-misregistration control corrects the following:
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Horizontal scanning start position
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Horizontal scanning magnification
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Vertical scanning start position
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Vertical scanning inclination
The DC controller forms a pattern of toner on the surface of the ITB, and measures a misaligned length
with the registration density sensor and the registration density belt-perimeter sensor. Accordingly, the
formatter calibrates the misaligned color.
Figure 1-29 Color-misregistration control
ITB
Pattern of toner
Regisration density sensor
Registration density
belt-perimeter sensor
ENWW
Image-formation system
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