Inkjet recording device and inkjet recording method

Abstract

An inkjet recording device automatically determines an excitation voltage of a piezoelectric element for formation of ink droplets. An excitation voltage value is applied to the piezoelectric element of a nozzle over a plurality of sweeping events. A charge voltage is applied to ink droplets generated by the applied excitation voltage value in a plurality of arbitrary printing phases to give an electric charge thereto. A charge amount given to the ink droplets is detected by a sensor to obtain a printing phase. When the relationship of a current printing phase to a previous printing phase detected for each sweeping event is reversed from an increasing side to a decreasing side and two decrease determinations of the printing phase are established in succession, an excitation voltage value corresponding to the printing phase of the sweeping event immediately before the first decrease determination is set as a final excitation voltage value.