Abstract: An inkjet printer includes an inkjet head having multiple nozzles that eject an ultraviolet-curable ink, an ultraviolet irradiator that cures the ink, a carriage on which the inkjet head and the ultraviolet irradiator are mounted, a carriage drive mechanism that moves the carriage in a main scanning direction, and a controller that controls the ultraviolet irradiator. A part of the ultraviolet irradiator disposed at the same position as the inkjet head in a sub scanning direction is a head position ultraviolet irradiation portion. The controller makes a peak illuminance of ultraviolet with which the head position ultraviolet irradiation portion irradiates the ink when the carriage moves at a moving speed V2 lower than a peak illuminance of ultraviolet with which the head position ultraviolet irradiation portion irradiates the ink when the carriage moves at a moving speed V1, where the moving speed V2 is lower than the moving speed V1.

Abstract: An inkjet printer that includes an inkjet head in which a plurality of ink flow paths are formed is provided. In this inkjet printer, a plurality of nozzles from which ink is ejected and a plurality of ink flow paths to which the plurality of nozzles 0 are connected are formed in an inkjet head. The inkjet head includes a plurality of ejection energy generation elements that make the plurality of respective nozzles eject ink. Based on an ink flow rate which is a flow rate of ink flowing into each of the plurality of ink flow paths and internal temperature or external temperature of the inkjet head, a controller of the inkjet printer estimates the ink temperature in each of the plurality of ink flow paths, and controls drive voltage applied to the plurality of ejection energy generation elements based on the result of the estimation.

Abstract: [Object] To appropriately warm ink. [Solving Means] An inkjet printer 1 includes an inkjet head 3 and an ink warming mechanism 12. The ink warming mechanism 12 includes a warming part main body 21; an ink flow path 21a formed inside the warming part main body 21; a heater 22 that is attached to the warming part main body 21 and heats the warming part main body 21; a warming part temperature sensor 23 that is attached to the warming part main body 21 and detects a temperature of the warming part main body 21; and a heater controller 4 that controls the heater 22. The heater controller 24 controls the heater 22 based on the detection result of the warming part temperature sensor 23 so that the temperature of the warming part main body 21 becomes a predetermined reference temperature.

Abstract: An inkjet printer includes an inkjet head having multiple nozzles that eject an ultraviolet-curable ink, an ultraviolet irradiator that cures the ink, a carriage on which the inkjet head and the ultraviolet irradiator are mounted, a carriage drive mechanism that moves the carriage in a main scanning direction, and a controller that controls the ultraviolet irradiator. A part of the ultraviolet irradiator disposed at the same position as the inkjet head in a sub scanning direction is a head position ultraviolet irradiation portion. The controller makes a peak illuminance of ultraviolet with which the head position ultraviolet irradiation portion irradiates the ink when the carriage moves at a moving speed V2 lower than a peak illuminance of ultraviolet with which the head position ultraviolet irradiation portion irradiates the ink when the carriage moves at a moving speed V1, where the moving speed V2 is lower than the moving speed V1.

Abstract: In an inkjet printer, an ultraviolet irradiator includes a first irradiation portion disposed at the same position as a color ink ejection portion in a front-back direction and a third irradiation portion disposed on the front side of a clear ink ejection portion in the front-back direction, where at the time of printing in a gloss tone printing mode, an average illuminance of a fifth irradiation portion that forms the front side portion of the first irradiation portion is lower than an average illuminance of a fourth irradiation portion that forms the back side portion of the first irradiation portion.

Abstract: This inkjet printer includes a temperature sensor for detecting temperature of UV ink inside an inkjet head, and the inkjet head includes multiple piezoelectric elements that eject UV ink from each of a plurality of nozzles. In this inkjet printer, a controller that controls the inkjet printer constantly monitors temperature detected by the temperature sensor, and controls a drive voltage applied to the piezoelectric element in real time on the basis of a detection result of the temperature sensor so that a drive voltage applied to the piezoelectric element becomes low in response to a temperature rise detected by the temperature sensor.

Abstract: In an inkjet printer, an ultraviolet irradiator includes a first irradiation portion disposed at the same position as a color ink ejection portion in a front-back direction and a third irradiation portion disposed on the front side of a clear ink ejection portion in the front-back direction, where at the time of printing in a gloss tone printing mode, an average illuminance of a fifth irradiation portion that forms the front side portion of the first irradiation portion is lower than an average illuminance of a fourth irradiation portion that forms the back side portion of the first irradiation portion.