Development
SM 6-45 D017/D018/D019/D020
Detailed
Descriptions
 ID sensor output (Vsp/Vsg)
 (Vts or the current Vref) - Vt
Toner Supply Determination
The reference voltage (Vts or Vref) is the threshold voltage for determining whether or not
to supply toner. If Vt becomes greater than the reference voltage, the machine supplies
additional toner.
Toner Supply Motor On Time Determinations
For fixed control mode, the toner supply motor on time is specified by the setting of
SP2-925, and does not vary. The default setting is 200 ms for each copy. The toner supply
motor on time for each value of SP2-925 is as follows.
SP2-925 Motor On Time (t = 200 ms)
0 t
1 2t
2 4t
3 8t
4 12t
5 16t
6 Continuously
7 Not supplied
For sensor control modes 1 and 2, the toner supply motor on time is decided by the
following factors.
 ΔVt (= Vt – (Vref or Vts))
 TD sensor sensitivity (coefficient: S, value is 0.3)
There are seven levels for toner supply motor on time as shown below.
Level Decision Motor On Time (seconds)
1
0 <ΔVt < or = S/16
t (0.6)
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