Patent ID: 8870338

Claim:
A method for adjusting a head module of an inkjet head in which a plurality of head modules having a plurality of nozzles capable of ejecting droplets are connected and linked together, the inkjet head having an overlapping region in which an arrangement sequence of the head modules corresponding to the ejected droplets becomes alternate between adjacent head modules, the method comprising the steps of: obtaining, among intervals between the droplet ejected by one of the head modules and the droplet ejected by another one of the head modules in the overlapping region, a largest interval between the droplets in a direction of alignment of the head modules based upon movement of the droplets caused by a landing interference, which is an interaction between the droplets ejected from the nozzles of the head modules, the droplets being attracted to each other due to the interaction; and adjusting the adjacent head modules in a direction to decrease the largest interval between the droplets.