A mobile printer includes an ultrasound sensor to sense a set of ultrasonically-sensed positional data points of a print nozzle of the printer, at least one optical sensor to sense a set of optically-sensed positional data points of the print nozzle, and a processor. The processor is to apply a correction function on the set of ultrasonically-sensed positional data points and on the set of optically-sensed positional data points to provide a set of corrected positional data points of the print nozzle and is to cause the print nozzle to deposit according to a print request and according to the set of corrected positional data points.

Methods for printing using printing systems comprising a flexible intermediate transfer member (ITM) disposed around a plurality of guide rollers at which encoders are installed, and an image-forming station at which ink images are formed by droplet deposition by print bars onto the ITM, can include measuring a local velocity of the ITM under one of the print bars, determining a stretch factor for a portion of the ITM based on a relationship between an estimated stretched length fixed physical distance between print bars, controlling an ink deposition parameter according to the stretch factor so as to compensate for stretching of the reference portion of the ITM.

A liquid ejection apparatus includes a medium container, a liquid ejection head, a mover, and a controller. The mover is configured to execute, among a first moving operation of moving a sheet-like medium and a second moving operation of moving the liquid ejection head, at least the first moving operation. The controller causes the liquid ejection head and the mover to alternately or simultaneously perform execution of the first moving operation and execution of ejection and second moving operations, and adjusts at least one selected from the group of an amount of liquid to be ejected, a time interval between the ejection operations when alternately performing execution of the first moving operation and execution of the ejection and second moving operations, and a moving speed of the medium when simultaneously executing the ejection operation and the first moving operation, according to medium information relating to curling of the medium.

There is provided a liquid discharge apparatus including: a liquid discharge head, a carriage, a carriage moving mechanism, a carriage motor, an output unit outputting a discharge determination signal, and a controller configured to carry out a determination of whether or not a liquid is discharged normally from the nozzle, based on the discharge determination signal outputted from the output unit when the liquid discharge head carries out an inspection driving. If a first condition is satisfied, then after a carriage drive in order to move the carriage to a predetermined position, the inspection driving is performed. If a second condition other than the first condition is satisfied, then the inspection driving is performed without performing the carriage drive.

An ink jet system includes a head unit that includes a nozzle discharging ink, a pressure chamber communicating with the nozzle, and a drive element applying pressure fluctuation to the ink in the pressure chamber by supplying a drive pulse, an acquisition portion that acquires output information including one or both of first output information regarding the head unit and second output information regarding the ink used for the head unit, a first coupling portion that is communicably network-coupled to a server, a first output portion that outputs the output information to the server via the first coupling portion, a first input portion to which input information is input from the server via the first coupling portion, and a determination portion that determines a drive timing of the drive element based on the input information.

A liquid ejecting apparatus includes an ejection head including a plurality of nozzles communicating with a pressure chamber and an actuator configured to apply pressure on liquid stored in the pressure chamber, a carriage, a storage storing information relating to a first timing when a non-ejecting flashing operation is started, and a controller. The actuator applies pressure on the liquid in the pressure chamber in the non-ejecting flashing operation so as to vibrate, without ejecting, the liquid in the plurality of nozzles of the ejection head, while the carriage is decreased in speed so as to be stopped. The controller is configured to select, based on status information, one of the first timing and a second timing, and start the non-ejecting-flashing operation at the selected timing while the carriage is decreased in speed so as to be stopped.

An ink jet system includes a head unit that includes a nozzle discharging ink, a pressure chamber communicating with the nozzle, and a drive element applying pressure fluctuation to the ink in the pressure chamber by supplying a drive pulse, an acquisition portion that acquires output information including first output information regarding the head unit and/or second output information regarding the ink used for the head unit, a first coupling portion that is communicably network-coupled to a server, a first output portion that outputs the output information to the server via the first coupling portion, a first input portion to which input information is input from the server via the first coupling portion, and a determination portion that determines the number of times of scanning or a scanning direction of the head unit with respect to a unit region on a medium based on the input information.

A system to direct print onto print substrates has a print head, at least one optical image sensor arranged adjacent a print substrate, wherein the print substrate will move in a process direction past the print head, at least one telecentric lens arranged between the print substrate and the at least one optical image sensor, and control circuitry electrically connected to the optical at least one image sensor and the print head, the control circuitry to generate dot clocks to cause the print head to print onto the substrate based upon data from the at least one optical image sensor identifying a position of the print substrate.

A wide array printhead module includes a plurality of printhead die, each of the printhead die includes a number of nozzles. The nozzles form a number of primitives. A nozzle firing heater is coupled to each of the nozzles. An application specific integrated circuit (ASIC) controls a number of activation pluses that activate the nozzle firing heaters for each of the nozzles associated with the primitives. The activation pulses are delayed between each of the primitives via internal delays and external delays to reduce peak power demands of the printhead die. The ASIC determines the internal delays within each printhead die.

A fluid ejection device includes a fluid slot, at least one fluid ejection chamber communicated with the fluid slot, a drop ejecting element within the at least one fluid ejection chamber, a fluid circulation channel communicated with the fluid slot and the at least one fluid ejection chamber, and a fluid circulating element communicated with the fluid circulation channel. The fluid circulating element is to provide on-demand circulation of fluid from the fluid slot through the fluid circulation channel and the at least one fluid ejection chamber.