LIQUID DISCHARGE DEVICE AND CONTROL METHOD OF LIQUID DISCHARGE DEVICE

To solve such a problem that there is such a risk that thickened ink near a nozzle diffuses to a pressure chamber side when the fine vibration is performed on a non-use discharge part group that is not used in printing.SOLUTION: A liquid discharge device 100 comprises a plurality of discharge part g...

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1. Verfasser: MATSUO KENICHIRO
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Sprache:eng ; jpn
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Zusammenfassung:To solve such a problem that there is such a risk that thickened ink near a nozzle diffuses to a pressure chamber side when the fine vibration is performed on a non-use discharge part group that is not used in printing.SOLUTION: A liquid discharge device 100 comprises a plurality of discharge part groups constituting a nozzle array 12 that can discharge ink. When setting the discharge part group that can discharge ink that is used as a use discharge part group and the discharge part group that can discharge ink that is not used as a non-use discharge part group in printing on a sheet P, a control unit 90 supplies a discharge pulse Pep in a period in which ink is discharged to a drive element E of the use discharge part group in the printing operation for performing the printing in a printing mode with the non-use nozzle group that does not use either ink of a plurality of inks, supplies a fine vibration pulse Pbp in printing in a period in which the ink is not discharged, and does not supply a fine vibration pulse Pb even in a period in which the ink is not discharged to the drive element E of the non-use discharge part group.SELECTED DRAWING: Figure 6 【課題】印刷において使用されない非使用吐出部群に対して微振動を行うと、ノズル近傍の増粘したインクが圧力室側に拡散する虞がある。【解決手段】液体吐出装置100は、インクを吐出可能なノズル列12を構成する吐出部群を複数備え、用紙Pへの印刷において、使用されるインクを吐出可能な前記吐出部群を使用吐出部群、使用されないインクを吐出可能な前記吐出部群を非使用吐出部群としたとき、制御部90は、複数のインクのうちいずれかのインクを使用しない非使用ノズル群あり印刷モードの前記印刷を行う印刷動作において、前記使用吐出部群の駆動素子Eに対して、インクを吐出させる期間には吐出パルスPepを供給し、インクを吐出させない期間には印字内微振動パルスPbpを供給し、前記非使用吐出部群の駆動素子Eに対しては、インクを吐出させない期間であっても微振動パルスPbを供給しない。【選択図】図6