Ricoh B234 - Image Pixel Count Control

DEVELOPMENT
SM 6-95 B234/B235/B236/D101/D102/D103
Detailed
Descriptions
Gain Determination
GAIN is another factor in the toner supply motor on time calculation. Its value can
be 0, 1, 1.5, 2, 3, or 4. It is calculated either using VSP/VSG if ID sensor control is
being used, or every copy using “VT – VREF” if TD sensor control is being used
(see Sensor Control Mode – Overview for more on TD and ID sensor control).
ID Sensor Control TD Sensor Control
VSP/VSG GAIN
a = V
T – VREF
GAIN
≤ 3/40
0
a < 0.00
0
≤ 9/100
0
0.00 ≤ a < 0.06
1
≤ 21/200
1
0.06 ≤ a < 0.10
2
≤ 1/8
1
0.10 ≤ a < 0.20
3
≤ 4/25
2
0.20 ≤ a
4
≤ 41/200
3
≤ 1/2
4
> 1/2
1
Toner Supply Motor On Time Calculation
The toner supply motor on time for each copy is decided using the following
formula: (GAIN x Image pixel count x 0.7mg/cm
2
/Toner Supply Rate) + 50 ms
When GAIN is “0”, the above 50 ms is set to “0”.
The toner supply rate can be changed using SP2209.
Image Pixel Count Control
This mode should only be use as a temporary countermeasure while waiting for
replacement parts, such as a TD sensor. This mode controls the toner supply using
the same formula for the toner supply motor on time. However, the GAIN value is
fixed at 0.7.