73
Ricoh Co. Ltd.
http://www.ricoh.com/
B245-62 / PD-C4
Slide 73
Toner Density Control 6
Toner supply motor on time in sensor control mode
For sensor control modes 1 and 2, the toner supply motor
on time is decided by the following factors.
» Vt
» Vref or Vts
» TD sensor sensitivity (coefficient: S, value is 0.4)
There are seven levels for toner supply motor on time as
shown in the table below.
T (30); see note 3
Vt
≥
(Vts or Vref) + S (toner end)
7
T (30); see note 3
Vt
≥
(Vts or Vref) + 4S/16 (near-end)
6
t x 16 (6.4)
(Vts or Vref) < Vt
≤
(Vts or Vref) + 4S/5
5
t x 8 (3.2)
(Vts or Vref) < Vt
≤
(Vts or Vref) + S/2
4
t x 4 (1.6)
(Vts or Vref) < Vt
≤
(Vts or Vref) + S/4
3
t x 2 (0.8)
(Vts or Vref) < Vt
≤
(Vts or Vref) + S/8
2
t (0.4)
(Vts or Vref) < Vt
≤
(Vts or Vref) + S/16
1
Motor On Time (seconds)
Decision
Level
The value of “t” can be changed using SP 2922. (default: 0.4 second)
The value of “T” can be changed using SP 2923. (default: 30 seconds)
T (30) means that toner is supplied intermittently in a 1/3 duty cycle (1 s on, 2 s
off) for 30 seconds.
