●
After a specified period of time from the previous image density control.
●
The environment is changed for a specified condition after the previous image density control.
Image halftone control (DHALF)
The image halftone control is performed by the formatter to calibrate the halftone. The DC controller
measures the halftone pattern according to a command from the formatter. Accordingly, the formatter
calibrates the halftone. The DC controller controls the image halftone under the following conditions:
●
The image density control is completed.
●
The formatter sends a command.
The DC controller determines an abnormal sensor and notifies the formatter if it detects an out of
specified range data from the registration density sensor or the registration density belt-perimeter sensor
under the following conditions:
●
Cartridge presence detection
●
Starting the DMAX/DHALF control
ENWW
Image-formation system
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