Printing apparatus, control method for printing apparatus, and control program for printing apparatus

摘要

A printing apparatus includes a first piezoelectric element; a first cavity; a first nozzle; a second piezoelectric element; a second cavity; a second nozzle; a drive signal generating unit that generates a drive signal; a residual vibration detecting unit that detects the first residual vibration signal and the second residual vibration signal; a discharge state determining unit that determines the state of discharge from the first nozzle from the first residual vibration signal and determines the state of discharge from the second nozzle from the second residual vibration signal; and a setting unit that sets the frequency of detection of the first residual vibration signal to be higher than the frequency of detection of the second residual vibration signal.

主权项

1. A printing apparatus comprising:
a first piezoelectric element; a first cavity that is filled with a first liquid, the pressure inside the first cavity being increased or decreased by displacement of the first piezoelectric element; a first nozzle that communicates with the first cavity and discharges the first liquid as a liquid drop by an increase or a decrease in the pressure inside the first cavity; a second piezoelectric element; a second cavity that is filled with a second liquid, the pressure inside the second cavity being increased or decreased by displacement of the second piezoelectric element; a second nozzle that communicates with the second cavity and discharges the second liquid as a liquid drop by an increase or a decrease in the pressure inside the second cavity; a drive signal generating unit that generates a drive signal displacing the first piezoelectric element as well as the second piezoelectric element, causes a first residual vibration signal to occur in the first piezoelectric element in response to an increase or a decrease in the pressure inside the first cavity due to application of the drive signal to the first piezoelectric element, and causes a second residual vibration signal to occur in the second piezoelectric element in response to an increase or a decrease in the pressure inside the second cavity due to application of the drive signal to the second piezoelectric element; a residual vibration detecting unit that detects the first residual vibration signal and the second residual vibration signal; a discharge state determining unit that determines the state of discharge from the first nozzle from the first residual vibration signal and determines the state of discharge from the second nozzle from the second residual vibration signal; and a setting unit that sets the frequency of detection of the first residual vibration signal to be higher than the frequency of detection of the second residual vibration signal.