PRINTING WITH MULTIPLE PRINTHEAD DIES

摘要

A method and apparatus for printing is disclosed. The printing is done with multiple printhead dies. The nozzles in the different printhead dies are fired using different phases in an up-sampled encoder signal. The different phases correspond to a print offset between the different printhead dies.

主权项

1. A printer, comprising:
at least two printhead dies in a spaced apart relationship, where each printhead die comprises a plurality of nozzles; an encoder that provides an encoder signal; a controller coupled to the two printhead dies and the encoder, the controller to control the printer; the controller to up-sample the encoder signal to higher than a print resolution in a print direction; the controller to select a first one of the up-sampled encoder signal phases for a first one of the at least two printhead dies; the controller to select a second one of the up-sampled encoder signal phases fbr a second one of the at least two printhead dies, wherein the difference between the first one and the second one of the up-sampled encoder signal phases corresponds to a print offset between the first printhead die and the second printhead die; the controller to fire nozzles in the first printhead die at the print resolution beginning at the first one of the up-sampled encoder signal phases; the controller to fire nozzles in the second printhead die at the print resolution beginning at the second one of the up-sampled encoder signal phases.