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Summary of Toner Supply Control
Slide 410
# This flow chart explains toner supply control, with SP 3042 01 set to 'enabled',
and PID control mode.
# Vtref calibration is done every 10 pages. The Vtref value from this process is
picked up by the PID control algorithm ('Get Vtref' in the diagram). The PID
control algorithm is done every page, to control the toner supply.
(SP3042 001 Vtref Calibration Mode ON)
Toner Supply Control Method:
PID Control
Lower Vtref
Start Print Job
GAVD
Get Pixel Count
TD Sensor Reads
Calculate Image
dpi
Get Vtref
Coverage
Calculate Amount of
Toner
Supply Amount
Supply Amount
(Pixel Ratio)
(Vt Ratio)
Result of Toner Amount Calculation
Toner Supply Time Conversion
(Sub Hopper Clutch ON Time)
Toner Supply
(Sub Hopper ClutchON)
410
Page Interval Process Control
Create ID Sensor Patterns
Read ID Sensor Patterns
Determine Amount of Toner
Compare Reading with Threshold Range for
Toner Adjustment Between Pages
Light
Correct
Dark
No Action
Raise Vtref
V-C3 Training
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