Abstract: There is provided a head bar unit including a head bar, an adjuster and a movement. The head bar includes a plurality of heads. The adjuster is supported by the head bar, and is configured to adjust positions in a vertical direction of the heads. The movement is configured to move the head bar and the adjuster in the vertical direction. The adjuster includes a motor, a rotator and a stopper. The rotator includes a plurality of contact portions. The rotator is configured to be rotated by the motor around a rotating shaft. The stopper is located at a position facing the rotator in the vertical direction, and is configured to position the rotator in the vertical direction, by making contact with one of the contact portions.

Abstract: There is provided a head bar unit including a head bar, an adjuster and a movement. The head bar includes a plurality of heads. The adjuster is supported by the head bar, and is configured to adjust positions in a vertical direction of the heads. The movement is configured to move the head bar and the adjuster in the vertical direction. The adjuster includes a motor, a rotator and a stopper. The rotator includes a plurality of contact portions. The rotator is configured to be rotated by the motor around a rotating shaft. The stopper is located at a position facing the rotator in the vertical direction, and is configured to position the rotator in the vertical direction, by making contact with one of the contact portions.

Abstract: A droplet ejecting device includes: a first nozzle group consisting of N pieces of first nozzles aligned in a first direction; a second nozzle group consisting of N pieces of second nozzles aligned in the first direction and at the same positions in the first direction as the first nozzles; and a controller. The controller is configured to determine whether an ejection quantity per unit time is not smaller than a first threshold. When the ejection quantity is equal to or greater than the first threshold, a first combination of N pieces of nozzles from among the N pieces of first nozzles and the N pieces of second nozzles is selected. When the ejection quantity is smaller than the first threshold, a second combination of N pieces of nozzles from among the N pieces of first nozzles and the N pieces of second nozzles is selected.

Abstract: A droplet ejecting device includes: a first nozzle group consisting of N pieces of first nozzles aligned in a first direction; a second nozzle group consisting of N pieces of second nozzles aligned in the first direction and at the same positions in the first direction as the first nozzles; and a controller. The controller is configured to determine whether an ejection quantity per unit time is not smaller than a first threshold. When the ejection quantity is equal to or greater than the first threshold, a first combination of N pieces of nozzles from among the N pieces of first nozzles and the N pieces of second nozzles is selected. When the ejection quantity is smaller than the first threshold, a second combination of N pieces of nozzles from among the N pieces of first nozzles and the N pieces of second nozzles is selected.