Image Pixel Count Control - Gestetner B070 Service Manual

DEVELOPMENT
Gain Determination
GAIN is another factor in the toner supply roller clutch on time calculation. Its value
can be 0, 1, 1.5, 2, 3, or 4. It is calculated either using V
is being used, or every copy using "V
(see Sensor Control Mode – Overview for more on TD and ID sensor control).
ID Sensor Control
V /V
SP SG
≤ 3/40
≤ 9/100
≤ 21/200
≤ 1/8
≤ 4/25
≤ 41/200
≤ 1/2
> 1/2
Toner Supply Roller Clutch On Time Calculation
The toner supply roller clutch on time for each copy is decided using the following
formula: (GAIN x Image pixel count x 0.7mg/cm
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 roller clutch on time. However, the GAIN
value is fixed at 0.7.
B070/B071
CÓPIA NÃO CONTROLADA
– V
T REF
GAIN a = V
0
0 0.00 ≤ a < 0.06
1 0.06 ≤ a < 0.10
1 0.10 ≤ a < 0.20
2
3
4
1
6-82
CÓPIA NÃO CONTROLADA
/V
SP SG
" if TD sensor control is being used
TD Sensor Control
GAIN
– V
T REF
a < 0.00
0.20 ≤ a
2
/Toner Supply Rate) + 50 ms
if ID sensor control
0
1
2
3
4
SM