(2) Vsp for Toner Supply Control, Vsp(toner)
The laser diode writes a sensor pattern for each color using standard laser
diode power. After the pattern is developed, the machine then measures the
ID sensor output from this pattern and uses the result as Vsp(toner) for that
color to control the toner supply. This process is done for each color cycle,
after every copy.
(3) Calculation of M/A
First, the machine calculates a value from the current value of V
SP
(toner).
Then, the machine refers to a "look-up" table in ROM to determine the toner
density on the drum (M/A).
M/A: Toner amount per unit area on the drum (mg/cm
2
)
PROCESS CONTROL
A166/A187/A189 2-16 SM
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