Ricoh FT6645 Manual page 35

PROCESS CONTROL
1.3.8 Initial Setting Sequence
The following graph shows the sequence of events during process control
data initial setting.
Scanner forward
Motor reverse
Exposure
Lamp
V
800
V
100
Potential
Sensor
Output
1. Potential
sensor
calibration
1. Potential sensor calibration
By measuring the output of the drum potential sensor when –100 V and
–800 V are applied to the drum, the sensor output (V
calibrated automatically (See page 2-5 for details).
2. V , V , V potential detection
R D L
After about 30 seconds of drum conditioning, V
developed by using the previous grid bias voltage (V
exposure lamp voltage (V
The machine calculates the new V
detected V , V
R
V
D
V
R
2. V , V
R'
potential
detection
Latent Image Control
) data to detect the V
LAMP
, V data.
D L
New V
V
L
New V
R
', V ' 3. V
D L D
correction
and V
D
and V
GRID LAMP
2-10
23 April 1993
for the purpose
of ADS sensor
correction
D
New V
L
, V 4. ID sensor
L
pattern
potential
detection
and V ) is
100 800
Patterns are
L
) data and
GRID
, V , V data.
R D L
data using the