August 2006 PROCESS CONTROL

6-89

Detailed
Descriptions
Toner Supply Operation Flow

Page Interval Process Control

(SP3042 001 Vtref Calibration Mode ON)

Create ID Sensor Patterns
Read ID Sensor Patterns
Determine Amount of Toner
Compare Reading with Threshold Range for
Toner Adjustment Between Pages
Correct
Light Dark
No ActionLower Vtref Raise Vtref

Toner Supply Control Method:

PID Control

GAVD
dpi
Start Print Job
Get Pixel Count TD Sensor Reads
Calculate Image
Coverage Get Vtref
Toner Supply Time Conversion
(Sub Hopper Clutch ON Time)
Calculate Amount of
Toner
Supply Amount
(Pixel Ratio) Supply Amount
(Vt Ratio)
Result of Toner Amount Calculation
Toner Supply
(Sub Hopper ClutchON)
B132D921.WMF