MULTINOZZLE INK JET PRINTER AND METHOD OF OPERATING SUCH A PRINTER

摘要

A closed loop servo system is used to adjust the driving voltage applied to the drop generator in a multinozzle plate ink jet printer so that the droplets in the weakest and strongest driven ink streams break off at the same distance from the nozzle plate. Charged drops are sensed by one or more sensors (48,50) and flight time data is derived from the sensor output signals by electronics (60) and a controller (66). A programmable driver (78) adjusts the voltage applied to a piezoelectric crystal drop generator in response to the output of the controller.