Image recording apparatus

An image recording apparatus comprising:

• a head to which a liquid is supplied from a liquid tank via a supply path, the head including an internal channel having a nozzle, and a driving element configured to impart, to the liquid in the internal channel, discharge energy for discharging the liquid from the nozzle;
• a moving mechanism configured to move, in a relative moving direction, one of a medium and the head relative to the other of the medium and the head;
• and
• a controller configured to output, to the driving element, a driving signal having a first voltage level or a second voltage level greater than the first voltage level, and to execute recording of an image on the medium by controlling the head to discharge the liquid from the nozzle toward the medium, while controlling the moving mechanism to move the head relative to the medium,
• wherein in a case that the controller executes the recording on the medium by controlling the head, the controller is configured to:
• generate the driving signal and output the driving signal to the driving element, at each of a plurality of pieces of a unit recording period which are continuous, with a time required for relative movement of one of the medium and the head relative to the other of the medium and the head only by a unit distance corresponding to resolution in the relative moving direction of an image to be recorded on the medium being defined as the unit recording period;
• control the moving mechanism to move the head relative to the medium selectively at either one of a first velocity and a second velocity slower than the first velocity;
• allow a voltage level of the driving signal to be the first voltage level in a case that the controller causes the head to move relative to the medium at the first velocity;
• and
• allow the voltage level of the driving signal to be the second voltage level in a case that the controller causes the head to move relative to the medium at the second velocity.