Gestetner B147, Руководство по обслуживанию

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PROCESS CONTROL
SM 6-13 B147/B149/B190
Detailed
Des
cription
s
Step 6: ID Sensor Highlight Pattern Generation
The machine makes a 10-grade pattern on the transfer belt for each toner color.
The pattern consists of 10 squares. Each of the squares is 12 mm x 15 mm, and is
a dot-pattern squares (not solid-color squares like in the process of step 2). They
are made using constant bias and charge roller voltages selected from one of the
types mentioned above, and the various grades are made by changing the LD
power.
Step 7: Sensor Pattern Density Detection
The ID sensor detects the densities of the 10 grade-pattern squares for each color.
This data goes to memory.
Step 8: V
L
(LD Power) Selection
The machine determines the relationship
between the amount of toner on the transfer
belt and the laser power for each of the 10
grades. The machine now selects the laser
power to get the target M/A.
Left
Transfer belt
12 mm
15 mm
B146D504.WMF
Target
M/A
M/A
L LD Power
B146D505.WMF