Printer device and maintenance method thereof

A printer device comprising:

• an ink tank that stores therein an ink;
• a guide rail that faces a medium supporting unit that supports a printing medium, and that moves relative to the printing medium supported by the medium supporting unit in a predetermined conveying direction, and extends in a scanning direction orthogonal to the predetermined conveying direction;
• a printer head that is reciprocatable relative to the guide rail in the scanning direction, and that discharges an ink from a nozzle opening that is open in a downward direction, by changing a capacity of an ink chamber, which communicates with the nozzle opening, by oscillation of an oscillating element;
• an ink supply channel via which the ink chamber is connected to the ink tank;
• a supply pump arranged in the ink supply channel to supply the ink stored in the ink tank to the ink chamber;
• and
• a drive control unit that controls the oscillation of the oscillating element and drive-controls the supply pump,
• wherein the drive control unit, after performing a first maintenance operation in which the drive control unit drive-controls the supply pump and controls the oscillating element to oscillate, performs a second maintenance operation in which the drive control unit drive-controls the supply pump to stop and controls the oscillating element to oscillate during maintenance of the printer head during the maintenance of the print head.