Color-misregistration control
Internal variations in the laser/scanners can cause the toner images to become misaligned. The color-
misregistration control corrects the following problems:
●
Horizontal scanning start position
●
Horizontal scanning magnification
●
Vertical scanning start position
The DC controller forms a pattern of toner on the surface of the ITB and measures a misaligned length with
the RD sensor.
Figure 1-29 Toner patterns for calibration
ITB
RD sensor
Pattern of toner
The DC controller signals the formatter to perform the color-misregistration control when one of the
following events occur:
●
A cartridge or the ITB is replaced.
●
A specified number of pages have printed.
●
The formatter sends a command.
The DC controller determines an RD sensor failure and notifies the formatter if it detects data from the RD
sensor that is not in a specified range, when the product is turned on or when the color-misregistration
control starts.
ENWW Image-formation system 41
To Next Page
Loading...