A liquid ejecting device includes a support portion configured to support a medium, an ejecting unit configured to eject liquid, a detector including sensors, and a control unit configured to determine, based on a detection result from the detector, a first space being a space between the ejecting unit and the medium. The sensors include a first sensor, a second sensor provided downstream of the first sensor in an ejection direction, and a third sensor provided at a position between the first sensor and the second sensor in the ejection direction. The control unit determines that the first space is in an error state when the first sensor detects the medium, and determines the first space based on a detection result of the medium when the first sensor does not detect the medium but at least one of the second sensor and the third sensor detects the medium.

The application device comprises a sensor that detects movement of the application device on an application target, a camera that obtains a captured image that is an image of a surface of the application target and is captured during the movement of the application device, a head that applies ink, and a processor, wherein the processor specifies an ink application area based on the captured image of the surface of the application target that is captured by the camera in accordance with the movement that is detected by the sensor, and controls the head to apply ink to the ink application area in accordance with the movement.

There is provided a liquid discharge apparatus including: a liquid discharge head having a nozzle surface; a carriage; a carriage mover; a conveyor conveying a medium in a conveyance direction; a velocity sensor; a distance sensor; and a controller. The controller makes a determination regarding the velocity of the carriage based on output of the velocity sensor, and makes a determination regarding the distance between the medium and the nozzle surface based on output of the distance sensor. In a case that that the controller determines that the velocity is less than a predetermined velocity and that the distance is less than a predetermined distance, the controller interrupts recording performed by the liquid discharge head.

A printer is provided to includes an ink head; a placement unit; a positional reference arranged near the placement unit as a reference for performing position adjustment in the up-down direction; and a first reflection member configured to be disposed at a lateral position separated from the placement unit toward a lateral side so that a position of the first reflection member in the up-down direction overlaps the positional reference and the printing target in a lateral view, wherein the first reflection member reflects light arriving from a lateral surface of the printing target and the positional reference, and an upper end of a reflective surface which reflects light is positioned above the positional reference and a lower end is positioned below the positional reference.

In order to determine the nip between a print head and a printing substrate in an ink printing apparatus, ink droplets of a first and second size are simultaneously fired toward the printing substrate by different nozzles of a nozzle row of the print head given a predetermined feed velocity of the printing substrate, whereby print dots of a first size are generated on the printing substrate in a first two print dot row and print dots of a second size are generated on the printing substrate in a second two print dot row. The clearance of the first two print dot row from the second two print dot row is subsequently measured, and the size of the nip is determined from the measured clearance.

An inkjet printer is provided, which is configured to acquire gap information related to a gap between an ink discharging surface and a recording sheet in each individual position of top-formed positions and bottom-formed positions within a predetermined wave-shape generating range, identify, when the predetermined wave-shape generating range includes a partial range in which the recording sheet is not placed, a top-formed position where the gap information has not been acquired and a bottom-formed position where the gap information has not been acquired, within the partial range, complement the unacquired gap information in the identified top-formed position with a value determined based on the respective pieces of gap information acquired in other top-formed positions, and complement the unacquired gap information in the identified bottom-formed position with a value determined based on the respective pieces of gap information acquired in other bottom-formed positions.

A controller is configured to receive an output signal outputted from a light reception element. The controller is configured to perform: an existence detection of controlling a light emission element to emit light and detecting whether an ejection target exists at a facing position based on the output signal; and a distance detection of controlling the light emission element to emit light toward a surface of the ejection target and detecting a distance between the surface of the ejection target and a nozzle surface based on the output signal outputted from the light reception element upon receiving light reflected off the surface of the ejection target. An amount of change of the output signal with respect to change of the distance in the distance detection is larger than an amount of change of the output signal with respect to change of the distance in the existence detection.

A printing apparatus receives, as serial data, a plurality of commands for driving a printhead including arrayed print elements to perform printing. Then, a first signal is internally generated in the apparatus, and a second signal is generated based on the position of a conveyed print medium. In addition, each command is extracted from the received serial data. While switching over the first and second signals based on each command, the printhead is driven to perform a preparation operation prior to image printing by the printhead based on the first signal and to print an image based on image data on the print medium based on the second signal. Upon switchover of the first signal to the second signal, switchover to the second signal is controlled after disabling the first signal for a predetermined period.

A liquid droplet discharging apparatus includes: a first piezoelectric element that moves a head in a first direction; a second piezoelectric element that moves the head in a second direction opposite to the first direction; a movement unit that moves a medium in the first direction in accordance with a predetermined target movement amount; a transport amount measurement unit as a movement amount measurement unit that measures a movement amount of the medium in the first direction; and a drive control unit that controls driving of the first piezoelectric element and the second piezoelectric element. The drive control unit drives either one of the first piezoelectric element or the second piezoelectric element according to a difference BA between a target transport amount A as the target movement amount and a transport amount B as the movement amount measured from the transport amount measurement unit.

When a wave shape is formed in a sheet of paper, a suppression of a reduction in recording quality that is caused by a shape of the paper is achieved, and thus, favorable recording quality is obtained.