In a method and device for ascertaining print data for a print image to be printed, the print data is adapted and/or determined such that the time curve of the ink flow quantity, exhibits no quantity changes or flow rates due to which ink ejection errors might be produced, in particular nozzle failures. The device includes: a communication interface configured to receive the print data; and processing circuitry that ascertains, based on the print data, a time curve of an ink flow quantity of ink that, during the printing of the print image, flows in the print bar and/or is ejected from the one or more nozzles of the print bar; and determine, based on the time curve of the ink flow quantity, whether an ink ejection error will be produced.

A liquid discharge apparatus to apply liquid to an application surface includes a head and processing circuitry. The head applies the liquid discharged from a nozzle to the application surface. The processing circuitry outputs abnormal discharge information of the nozzle. The abnormal discharge information is detected based on a shape of the liquid applied to the application surface.

One example provides a printhead including a plurality of printhead dies, each printhead die including at least one crack sense resistor. At least one analog bus is connected to each printhead die, the at least one analog bus to output voltages to facilitate a printer controller to determine whether at least one of the printhead dies is cracked.

Inkjet printing equipment capable of measuring a droplet includes a process stage providing a processing space for a process substrate, a pair of guide members disposed on opposite sides of the process stage, a head unit discharging a droplet onto the process substrate, a first gripper moving along the pair of guide members and gripping a side portion of the process substrate, a second gripper configured to move along the guide members and gripping a measurement substrate onto which a droplet is discharged in order to inspect the head unit, and a droplet inspection unit inspecting a discharge state of the droplet discharged onto the measurement substrate and outputting information of whether the discharge state of the droplet is normal or abnormal.

A printer includes an ink ejecting section that ejects ink from a nozzle, an ink circulation path including an ink flow path through which the ink can be supplied to an ink ejecting section and an ink return path through which the ink supplied to the ink ejecting section is returned, a warming device including a temperature control module provided in the ink circulation path, where the warming device can heat the ink in the temperature control module, and a feed pump that can flow the ink in the ink circulation path, wherein the flow rate of the ink, in the ink circulation path, heated by the warming device is adjusted.

In some implementations, a device may receive print data associated with a printer. The device may receive an image that depicts content that is printed on media by the printer. The device may determine, using a printhead analysis model, a status of a printhead of the printer based on the print data and a characteristic of the content, wherein the printhead analysis model is trained based on reference data associated with historical printing operations associated with one or more printers, wherein the reference data includes reference images associated with printed content from the historical printing operations and corresponding resistance measurements for one or more respective printheads of the one or more printers. The device may perform, based on the status, an action associated with the printhead of the printer.

A method for detecting printing nozzle errors in an inkjet printing machine provides a high degree of robustness in the detection of errors by printing a nozzle test pattern in the inkjet printing machine. The test pattern is then digitalized by using a camera and transmitted to a computer for evaluation. There, the recorded test pattern is investigated by using methods of digital image processing, such as a Fourier analysis, and evaluated in the frequency range with regard to specific anticipated printing nozzle errors. Specific printing nozzle errors can be detected especially on the basis of amplitude, phase and variance errors in the signal in the frequency range. Moreover, by using the phase error, it is possible to evaluate whether the two print heads are disposed in an incorrect adjustment position relative to one another by calculating displacements of the phase error in transition regions of two print heads.

Provided are a printing device and a print element substrate having a detection element row provided in correspondence to an ejection port row and capable of suppressing an increase in a length in an ejection port row direction. For that purpose, a row selection circuit 117 is provided in a detection element circuit 108, and a row of the detection element circuit is selected by row selection signals A0 and A1 transmitted through a common wiring.

A liquid ejecting device includes: an ejecting section group that includes a plurality of ejecting sections that receive a drive signal and eject a liquid; an ejection state check section that checks a state of a check target ejecting section that is an ejecting section among the plurality of ejecting sections; and a check target designation data management section that manages check target designation data that designates the check target ejecting section, the check target designation data management section including a first data-holding section and a second data-holding section, and having a first management mode in which the check target designation data management section updates data held by the first data-holding section and data held by the second data-holding section, and a second management mode in which the check target designation data management section updates the data held by the second data-holding section without updating the data held by the first data-holding section.

A plurality of sub control circuits are connected to respective ones of a plurality of head units. One of the plurality of sub control circuits is connected to a main control circuit so as to perform communication. The plurality of sub control circuits include a first control circuit and a second control circuit. The second control circuit is connected to the first control circuit in series so as to perform communication. The first control circuit is configured to: receive first data, the first data including a first parameter and a second parameter, the first parameter corresponding to the first control circuit, the second parameter corresponding to the second control circuit; and transmit the first data to the second control circuit. The second control circuit is configured to: receive the first data from the first control circuit; and delete the first parameter from the first data.