To inspect a discharge state of a nozzle of a discharge head in a state the a distance between the nozzle of the discharge head and a conductive wire is relatively long.
In a state that a potential difference is generated between each conductive wire of a conductive wire group 54 and each conductive wire of a conductive wire group 56, whether a conductive wire in inspection through which a current flows by an ink drop discharged from a nozzle of an inspection object is present is determined, and normal discharge, abnormal discharge or non-discharge is determined by comparison between the conductive wire in inspection and a conductive wire at a normal time through which a current flows when the ink drop is normally discharged from the nozzle of the inspection object. Thereby, the normal discharge, the abnormal discharge or the non-discharge can be determined in the state that the distance between the nozzle and the conductive wire group 54 or the conductive wire group 56 is relatively long.
Osamu Suzawa
Kazuhiko Miyasaka