INKJET PRINT DEVICE AND INKJET HEAD EJECTION PERFORMANCE EVALUATION METHOD

摘要

An inkjet head ejection performance evaluation method includes: printing a test pattern for examining an ejection condition for each nozzle by an inkjet head and reading the test pattern by an image reading device; measuring a first depositing position for each nozzle from a read image to calculate an angle deviation amount of the inkjet head based on the first depositing position and pattern information; calculating at least one of a second depositing position and second deposit displacement amount in which an influence due to angle deviation caused is eliminated; calculating a moving amount caused by rotation of the angle deviation amount from a reference position of the nozzle at a reference attaching angle up to a current nozzle position; and calculating, by using these calculation results, at least one of a distance between the adjacent pixels and a third deposit displacement amount including the influence.

主权项

1. An inkjet print device comprising:
an inkjet head having a plurality of nozzles arrayed in a matrix; a test pattern output control device which controls the inkjet head to record a test pattern for examining an ejection condition for each of the nozzles on a recording medium; an image reading device which optically reads an image of the test pattern recorded on the recording medium; a first calculation device which measures a first depositing position for each of the nozzles from the read image of the test pattern read by the image reading device; an angle deviation amount calculating device which calculates an angle deviation amount of the inkjet head with respect to a reference attaching angle based on the first depositing position measured by the first calculation device and pattern information of the test pattern; a second calculation device which calculates at least one of a second depositing position for each of the nozzles and a second deposit displacement amount for each of the nozzles in which an influence due to angle deviation caused by the angle deviation amount is eliminated from at least one of the first depositing position for each of the nozzles measured by the first calculation device and a first deposit displacement amount for each of the nozzles calculated based on data of the first depositing position; a third calculation device which calculates a moving amount caused by rotation of the angle deviation amount from a reference position of the nozzle at the reference attaching angle up to a current nozzle position based on the angle deviation amount calculated by the angle deviation amount calculating device; and a fourth calculation device which uses calculation results by the second calculation device and the third calculation device to calculate at least one of a distance between adjacent pixels including the influence due to the angle deviation and a third deposit displacement amount for each of the nozzles including the influence due to the angle deviation.