Ricoh FT6645 Manual page 80

23 April 1993
4.5.3 Toner Supply Control
By using an SP mode (
of toner supply controls can be selected.
•
Auto Process Control Mode
•
Detect Mode
•
Fixed Mode
1) Auto Process Control Mode
Originals have various image proportions and image densities. For the
best toner supply control, it is necessary to link the amount of toner
supplied on each copy cycle to the amount of toner consumed for each
copy.
Fuzzy control is used in this model to provide this kind of toner supply
control.
Fuzzy Control 1
According to data of the ID sensor and TD sensor, the CPU checks the
following at every copy cycle:
1. The results of toner supply control (TD sensor output) in the
previous copy cycle.
2. How quickly the toner density is changing.
Then the CPU decides the most suitable toner supply amount (toner
supply clutch on time) for the next copy cycle by using fuzzy logic.
Adjustment mode: PAGE 7), the following 3 kinds
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DEVELOPMENT