Printing device

A printing device comprising:

• a turntable configured to turn a printing object which is to be mounted thereon in such a manner that a printed face thereof, which has a doughnut shape, is directed upward;
• a printing head provided with a plurality of nozzles for spouting inks and configured to move axially towards a center of rotation of the printing object from outside the doughnut-shaped printed face of the printing object;
• and
• a controller provided for controlling a moving speed of the printing head, a rotating speed of the turntable, and spouting of the inks by the plurality of the nozzles, the controller performing a controlling operation in a manner such that a printing is spirally applied onto the doughnut-shaped printed face of the printing object by continuously axially moving the printing head while spouting inks from the plurality of the nozzles, respectively, at a constant interval, and increasing the rotating speed of the turntable and the axial moving speed of the printing head as the printing head approaches the center of rotation so as to equalize a relative moving speed between the printing head and the printing object on the turn table.