Ricoh K-C1 - Toner Density Control; Overview

DEVELOPMENT 20 February, 2001
6-44
6.9.6 TONER DENSITY CONTROL
Overview
There are four modes for controlling toner supply as shown in the following tables,
which can be changed with by SP2-921. The factory setting is sensor control 1
mode.
Basically, the toner concentration in the developer is controlled using the standard
TD sensor voltage (Vts), toner supply reference voltage (Vref), actual TD sensor
output voltage (Vt), and ID sensor output data (Vsp/Vsg).
TD Sensor Initial
Setting (Vts)
ID Sensor Output
(Vsp/Vsg)
Vt Reference
Voltage Update
Vt Reference
Voltage (Vref)
TD Sensor Output
(Vt)
Toner Supply Motor On Time
Calculation
New Vref
Vref Update
B039D315.WMF