Videojet Systems International, Inc.

James R. Pickell

Robert I. Keur

James E. Clark

James R Pickell

Robert I Keur

James E Clark

A drive control system is disclosed which automatically maintains nozzle drive voltage within a proper range. The control system monitors the state of the 'intermediate satellites' positioned between ink drops used for printing. When these satellites are neither forward nor backward merging, a first cardinal point designated C(L) is identified. A second cardinal point, C(H), is determined when the drop breakoff point stops decreasing, relative to said nozzle, with increasing nozzle drive voltage. From the two cardinal values, a desired operating range for a particular ink can be computed and the control system automatically set. The computed value is essentially independent of temperature.

Nozzle drive control system and method for ink jet printing

A drive control system automatically maintains nozzle drive voltage within a proper range. The control system monitors the state of the 'intermediate satellites' positioned between ink drops used for printing. When these satellites are neither forwared nor backward merging, a first cardinal point designated C(L) is identified. A second cardinal point, C(H), is determined when the drop breakoff point stops decreasing, relative to said nozzle, with increasing nozzle drive voltage. From the two cardinal values, a desired operating range for a particular ink can be computed and the control system automatically set. The computed value is essentially independent of temperature.

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Bartlett, IL, United States of America

James R Pickell