| 摘要 |
A method and apparatus for minimizing operator manual adjustments for toner concentration drifts in a printing machine. The method includes storing into a controller, a value for a toner concentration factor, and of estimating a quantity of toner to be depleted by each toner reproduction of a document sheet. The method also includes maintaining the toner concentration ratio by adding to a development housing a quantity of fresh toner, and of keeping a running count of toner reproductions of document sheets made. The method further includes manually adjusting the quantity of fresh toner added based on inspecting toner reproductions made, keeping a count of the number of such manual adjustments, and automatically correcting the stored value for the toner concentration factor, when the number of manual adjustments, relative to a predetermined running count of toner reproductions, reaches a predetermined number.
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