Abstract: A printer controller generates a foam elimination flushing driving signal that includes a foam elimination flushing process driving pulse for eliminating foam within the ink flow channel by driving a piezoelectric element; a foam elimination flushing process for restoring the ejection capability of a recording head is carried out using the foam elimination flushing driving signal before ink within the ink flow channel is heated by a heating mechanism.

Abstract: In the ejection process in which the ink is ejected by using the ejection driving pulse, the ink is heated by a heating mechanism. On the other hand, in the maintenance process in which the ejection ability of the printing head is recovered by repeatedly applying the maintenance driving pulse to the piezoelectric oscillator, the ink is cooled by a cooling mechanism.

Abstract: A driving pulse for air bubble removal flushing which is a first maintenance pulse is a driving pulse which removes air bubbles in an ink flow path of a recording head, a driving pulse for thickened ink discharge flushing which is a second maintenance pulse is a driving pulse which removes thickened ink, thereby stabilizing a meniscus, and in a maintenance process which restores ejection capability of the recording head, after an air bubble removal flushing process is executed by using the driving pulse for air bubble removal flushing, a thickened ink discharge flushing process is executed by using the driving pulse for thickened ink discharge flushing.

Abstract: A liquid ejecting head including a plurality of nozzle groups, a plurality of reservoirs, each of which corresponds to each nozzle group, each reservoir having an introduction port, wherein the reservoirs include a first reservoir in which the introduction port is disposed in the center of the reservoir in the nozzle row direction and a second reservoir in which the introduction port offset from the center of the reservoir, and wherein a liquid having a pressure P comparatively higher than those of other liquids among plurality types of liquids ejected from the liquid ejecting head is introduced into the first reservoir.