Ink drop measurement pad, inkjet printer device including same, and ink drop measurement method

A method for measuring ink drops, which measures ink drops sprayed and dropped from an inkjet head of an inkjet device, the method comprising:

• supplying an ink drop measurement pad in which a plurality of groove portions are formed with an interval corresponding to a nozzle pitch of an inkjet device and have uniform cross-sections throughout an entire longitudinal direction and supporting the ink drop measurement pad by a plate;
• arranging the ink drop measurement pad below the inkjet head while aligning the groove portions to be positioned perpendicularly below a nozzle;
• spraying ink drops from the nozzle toward the ink drop measurement pad and dropping the ink drops into the groove portions;
• and
• measuring a deviation of a length and a central position of each ink drop dropped into the groove portions by using an ink drop measurement device,
• wherein, in the measuring,
• when a specific voltage waveform is applied to a specific nozzle to eject a plurality of drops, a volume of the ink drop dropped onto the ink drop measurement pad is measured to calculate a volume ejected from the specific nozzle, and
• one or a plurality of voltage waveforms are set in one nozzle for achieving a target volume of the ink drop by ejecting a plurality of ink drops at the same position of the ink drop measurement pad by using the calculated result.