Patent ID: 8141977

Claim:
A method of aligning a plurality of inkjet heads by using an inkjet head module comprising a frame, a plurality of heads coupled to the frame, a plurality of support racks interposed between the frame and the plurality of heads, respectively, to support the heads such that the heads are movable in relation to the frame, and a plurality of piezoelectric motors configured to move the plurality of heads, respectively, the method comprising: aligning the plurality of heads in relation to one another by moving the plurality of heads with the plurality of piezoelectric motors, respectively; collecting alignment data corresponding to how much each of the plurality of piezoelectric motors is operated to align the plurality of heads after aligning the plurality of heads in relation to one another; installing the inkjet head module on an inkjet apparatus after collecting the alignment data; and realigning the plurality of heads in relation to one another by operating the plurality of piezoelectric motors in accordance with the alignment data after installing the inkjet head module.