There is provided a printer including: a carriage; a head; a position sensitive detector having a light-emitter and a light-receiver; and a controller. The head has: a first nozzle from which a printing ink is discharged, and a second nozzle from which a liquid scattering a light emitted from the light-emitter is discharged. The controller is configured to execute: formation of a scattering film on the object by discharging the liquid from the second nozzle onto the object; measurement of a distance between the head and the object, with the light emitted from the light-emitter and irradiated onto the scattering film; and adjustment, based on the measured distance, of a discharging condition of discharging the ink from the first nozzle, and performing printing on the object.

In one example, a method for an inkjet web printer includes a print engine printing a first print job on a moving first web, a printer controller receiving a second print job, the printer controller determining that the second print job may be printed after the first print job on a second web automatically spliced to the moving first web, a web supply automatically splicing the second web to the moving first web, the printer controller reconfiguring the print engine from a first configuration for the first print job to a second configuration for the second print job without stopping the moving first web or the moving second web, and the print engine printing the second print job on the moving second web.

In one example, an inkjet web printer includes a print engine and a controller programmed to determine that a second print job following a first print job may be printed without stopping the web and, without stopping the web, cause the print engine to print the second print job.

A liquid discharge apparatus includes a liquid discharge unit, a position detector, and circuitry. The liquid discharge unit has a liquid discharge port and discharges a liquid from the liquid discharge port toward an object. The position detector detects a position of the liquid discharge unit relative to the object. The circuitry calculates a movement trajectory of the liquid discharge unit based on the position of the liquid discharge unit detected by the position detector. Further, the circuitry performs a first operation of causing the liquid discharge unit to move along the movement trajectory without discharging the liquid and performs a second operation of causing the liquid discharge unit to move along the movement trajectory while discharging the liquid to the object after the first operation.

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.

A three-dimensional object printing apparatus includes a liquid discharge head having a nozzle surface provided with a nozzle array including a plurality of nozzles for discharging a liquid, a moving mechanism that changes a position of the liquid discharge head with respect to a three-dimensional workpiece, and a sensor that detects a positional relationship of the liquid discharge head with respect to the workpiece, in which when an axis parallel to a normal line of the nozzle surface is set as a first axis, an axis parallel to the nozzle surface and intersecting an extending direction of the nozzle array is set as a second axis, and an axis that intersects both the first axis and the second axis is set as a third axis, the sensor detects a relative positional relationship of the liquid discharge head with respect to the workpiece in a direction along the third axis.

An information processing apparatus includes an acquisition unit, a decision unit, a determination unit, and a change unit. The acquisition unit acquires a measurement result regarding a printing medium characteristic value. The decision unit decides a candidate for a printing medium type based on the acquired measurement result, and a reference characteristic value of each of printing media types set in advance to identify a type of the measured printing medium. Information associated with the printing medium type to be printed is input. The determination unit determines whether to change the reference characteristic value of the printing medium type associated with the input information based on the measurement result and the printing medium type associated with the input information. Wherein, when the determination unit determines to change the reference characteristic value, the change unit changes the reference characteristic value of the printing medium type based on the measurement result.

Embodiments of a method of printing low volumes of paper bags on a digital printing press are provided. In the method, a plurality of orders are received. Each order includes a particular format relating to a bag size selected from a predetermined number of bag sizes and a graphic to be printed. In the method, the plurality of orders are organized into a plurality of batches. Each batch includes orders of the plurality of orders having a same bag size. A first batch is selected, and the graphic of the orders contained in the first batch is digitally printed on a first roll of paper having dimensions associated with the bag size of the first batch. The first roll of paper is fed through the digital printing press, and the digital printing press prints the graphic of each order contained in the first batch without stopping when transitioning between orders.

Method and devices for dynamically preventing printing errors caused by a media deformation are disclosed. In one example, a pen to print media space (PPS) distance is measured. A media deformation is identified in response to measuring the PPS distance. A corrective function is identified in response to identifying the media deformation. The corrective function identified is then performed. The proposed method provides for consistent quality across a print.

In one example, an inkjet web printer includes a print engine and a controller programmed to determine that a second print job following a first print job may be printed without stopping the web and, without stopping the web, cause the print engine to print the second print job.