A liquid ejection device includes a liquid ejection head having a plurality of nozzles, a carriage on which the liquid ejection head is mounted, the carriage alternately executing a first movement, which is a movement in a first direction, and a second movement, which is a movement in a second direction opposite to the first direction; and a control section configured to control the liquid ejection head and the carriage, wherein the control section is configured to determine whether or not the nozzle is a defective nozzle based on vibration generated by applying a drive signal having a specific waveform, and is configured to apply the drive signal of the specific waveform in the deceleration and acceleration period that spans the first movement deceleration period and the second movement acceleration period.

An operation of an inkjet recording device is performed without performing operations, such as interruption of an ink circulation process in an idle state and resetting, in a state in which execution of the ink circulation process is maintained. Ink is supplied to a nozzle to perform printing on a printing target. An idle-mode ink circulation process circulates ink in an idle state, the idle-mode ink circulation process repeating the circulation of the ink in a path, and a standby state at a predetermined time interval. An operation display unit displays a standby screen for the idle-mode ink circulation process and displays information for operating the inkjet recording device on the standby screen in a state in which execution of the idle-mode ink circulation process is maintained. The inkjet recording device receives an operation of the inkjet recording device based on the information displayed on the standby screen.

An ink printing apparatus includes an inkjet print head arranged to be movable in a designated direction and including a first print head nozzle configured to jet ink droplets and a second print head nozzle configured to jet a cleaning liquid. The ink printing apparatus may also include a capping unit detachably coupled to the inkjet print head and protecting the first print head nozzle and the second nozzle when coupled to the inkjet print head. The ink printing apparatus may further include a wiper removing solidified ink droplets around the first print head nozzle. The ink printing apparatus may further include a processor operatively connected to the inkjet print head and the capping unit, and configured to jet the cleaning liquid to the wiper through the inkjet print head.