A print head drive circuit drives a print head including an ejecting portion ejecting a liquid in response to a drive signal propagating through a drive signal line and a storage portion storing ejecting portion-related information changing in accordance with use of the ejecting portion, in which processing of reading the ejecting portion-related information changing in accordance with the use from the storage portion is performed before the drive signal for ejecting the liquid from the ejecting portion is supplied to the print head.

A liquid discharging apparatus includes a controller configured to execute: a recording processing, a first determining processing, a pre-recording flushing processing, a first flushing processing, and a second flushing processing. In a case that the controller determines, by the first determining processing, that the recording processing is to be executed in the second mode, the controller is configured to make a first flushing interval between the pre-recording flushing processing and the first flushing processing to be longer than a second flushing interval between the first flushing processing and the second flushing processing.

Determining a need for maintenance of a printing device in large format printing is described in which historical performance data including ink consumption data relating to the printing device may be obtained. Threshold data based on the obtained historical performance data indicative of a need for maintenance of the printing device may be identified. Current performance data of the printing device may be monitored and may be used to determine whether the current performance data exceeds the identified threshold data indicative of a need for maintenance of the printing device.

A method of operating a printer iteratively performs printhead purges and test pattern analysis until either every printhead has a number of inoperative inkjets that is less than a predetermined threshold or a maximum number of iterations is reached. An error message is generated for each printhead having a number of inoperative inkjets that is greater than the predetermined threshold. The iterative performance of the printhead purges and test pattern analysis is performed automatically prior to the commencement of printing operations with the printer to remove subjective and time-consuming analysis by a printer operator.

An information processing device includes a storage portion storing a learned model trained by machine learning based on a data set in which temperature information, setting information, and countermeasure information are associated, a reception portion receiving the temperature information and the setting information at a time of ejecting ink by the printing head, and a processing portion deciding a countermeasure to be executed for condensation based on the received temperature information and setting information and the learned model.

When printing is performed on a recording medium of a second size larger than a first size, a control portion, after passage of the recording medium of the first size at a position opposite a recording head before arrival of the recording medium of the second size at the position opposite the recording head, makes the recording head perform preparatory flushing processing in which ink is ejected toward openings from first nozzles that have not been set as target nozzles during printing on the recording medium of the first size but will be newly set as the target nozzles during printing on the recording medium of the second size.

A control portion sets, as a control period, a period after arrival, at a position opposite a recording head, of a first recording medium until passage, at the position opposite the recording head, of a last recording medium. The control portion sets nozzles that do not face the recording medium during the control period as first nozzles, and nozzles that face the recording medium during the control period as second nozzles, to make the total amount of ink ejected by each of the first nozzles in flashing processing during the control period smaller than the total amount of ink ejected by each of the second nozzles.

A control portion makes a recording head perform flushing processing every time a flushing area that does not overlap a recording medium faces the recording head but makes the recording head perform no flushing processing when a flushing area that at least in a part of it overlaps a recording medium faces the recording head. The longer a non-flashing period between the previous and present sessions of flushing processing, the larger the control portion makes the amount of ink ejected by each of nozzles in the present session of flushing processing.

A liquid discharging apparatus, having a head with nozzles, a scanning assembly, a conveyer, and a controller, is provided. The controller is configured to determine whether the nozzles are to be flushed in a moving action which accompanies a discharging action, if the controller determines the nozzles are not to be flushed in the moving action, conduct the moving action to move the head at a first acceleration rate; if the controller determines the nozzles are to be flushed in the moving action, determine whether a distance between a flushing range and a discharging range is greater than or equal to a predetermined distance; and if the controller determines the distance is greater than or equal to the predetermined distance, conduct the moving action to move the head at a second acceleration rate and control the head to discharge liquid for flushing the nozzles.

Provided is an inkjet recording apparatus that performs inkjet recording on a recording medium in a recording region. The inkjet recording apparatus includes a recording head that includes an ejection port surface where an ejection port for ejecting ink is provided, is the recording head being movable within a range including the recording region and a non-recording region where the recording is not performed, a cap capable of letting the ejection port in a capping state in the non-recording region, a blade that is placed between the recording region and the cap in a moving direction of the recording head, the blade being capable of wiping the ejection port of the recording head as the recording head moves from the non-recording region to the recording region, a blade moving unit capable of moving the blade up and down, and a control unit that controls the blade moving unit.