Abstract: A printer may comprise a printhead comprising a number of nozzles, an immiscible fluid applicator, and a processor to instruct the immiscible fluid applicator to apply immiscible fluid onto the surface of the printhead to cap the number of nozzles. A printer subassembly may comprise an immiscible fluid applicator to wipe a layer of immiscible fluid onto a surface of a printhead. A printer may comprise a page wide array printhead, an immiscible fluid applicator to wipe a layer of immiscible fluid over a printhead to cap nozzles over the width of the printhead, and a controller to instruct the printhead to print after the layer of immiscible fluid has been applied over the printhead so that ink ejects through the immiscible fluid while non-used nozzles remain capped by the immiscible fluid layer.

Abstract: In an example, a printhead-wiping device comprises: a wiper element and a biasing mechanism, the biasing mechanism to bias the wiper element towards a printhead. An actuator may be used to adjust a preload force applied to the biasing mechanism. The preload force applied to the biasing mechanism may be controlled using a controller so as to control a wiping force applied by the wiper element against the printhead.

Abstract: Powder distribution in additive manufacturing may include systems or methods to distribute powder from an intermediate buffer or reservoir while scanning over a stage with the buffer or reservoir.

Abstract: A method comprises switching on a first radiation source of a plurality of radiation sources. The plurality of radiation sources are for delivering radiation towards a print area of a printing apparatus. Each of the plurality of radiation sources may be connected to control circuitry via one of a plurality of circuit terminals. The method may further comprise detecting, using a detector, a change resulting from radiation from the first radiation source. The method may further comprise determining, using a processor, based on the detected change, connection information indicative of the circuit terminal to which the first radiation source is connected.

Abstract: In an example, a method includes controlling a drive mechanism (110) of an additive manufacturing apparatus (100) to move a build platform (104) of the apparatus relative a static member (102); monitoring the movement of the build platform (104) using an optical sensor (302) that senses relative displacement between the build platform (104) and the static member (102); and generating calibration data based on the movement of the build platform (104) for calibrating a drive controller (120) of the drive mechanism (110) to compensate for run-out effects in the movement of the build platform.

Abstract: In an example, a printhead-wiping device comprises: a wiper element and a biasing mechanism, the biasing mechanism to bias the wiper element towards a printhead. An actuator may be used to adjust a preload force applied to the biasing mechanism. The preload force applied to the biasing mechanism may be controlled using a controller so as to control a wiping force applied by the wiper element against the printhead.

Abstract: A printer is disclosed herein. The printer has a printhead having a plurality of ink nozzles for ejecting ink, a servicing mechanism for capturing the ejected ink from the ink nozzles, to service the printhead, and a control device coupled to the printhead and the servicing mechanism for regulating the servicing. As part of the regulation, the control device continues feeding a substrate towards the printhead during an idle period. The idle period of the printhead can be a duration when printing on the substrate is suspended. Further, the control device regulates ejection of ink from the ink nozzles towards the substrate during the idle period and operates the servicing mechanism during the idle period. In an example, the servicing mechanism captures the ink before the ink reaches the substrate.

Abstract: In one example, a method for wiping the face of a printhead includes wiping across the face of the printhead and then wiping along the face of the printhead with a web of cleaning material. In another example, a wiper for wiping a face of a printhead includes a rotatable shaft having an axis of rotation and a helical blade affixed to the shaft. The helical blade is simultaneously rotatable on the shaft against the face of the printhead and translatable along the face of the printhead in a direction parallel to the axis of rotation.

Abstract: A method of applying a cap to a printhead may comprise selectively applying an immiscible fluid to a surface of a printhead in which the immiscible fluid caps a number of nozzles on a number of nozzles defined within the printhead. A printhead may comprise a layer of immiscible fluid in which the immiscible fluid is selectively applied to the surface of the printhead and in which the immiscible fluid caps a number of nozzles defined within the printhead. A printer may comprise a printhead comprising a number of nozzles, an immiscible fluid applicator, and a processor to instruction the immiscible fluid applicator to apply a layer of immiscible fluid to the surface of the printhead.

Abstract: A printer is disclosed herein. The printer has a printhead having a plurality of ink nozzles for ejecting ink, a servicing mechanism for capturing the ejected ink from the ink nozzles, to service the printhead, and a control device coupled to the printhead and the servicing mechanism for regulating the servicing. As part of the regulation, the control device continues feeding a substrate towards the printhead during an idle period. The idle period of the printhead can be a duration when printing on the substrate is suspended. Further, the control device regulates ejection of ink from the ink nozzles towards the substrate during the idle period and operates the servicing mechanism during the idle period. In an example, the servicing mechanism captures the ink before the ink reaches the substrate.

Abstract: A printer may comprise a printhead comprising a number of nozzles, an immiscible fluid applicator, and a processor to instruct the immiscible fluid applicator to apply immiscible fluid onto the surface of the printhead to cap the number of nozzles. A printer subassembly may comprise an immiscible fluid applicator to wipe a layer of immiscible fluid onto a surface of a printhead. A printer may comprise a page wide array printhead, an immiscible fluid applicator to wipe a layer of immiscible fluid over a printhead to cap nozzles over the width of the printhead, and a controller to instruct the printhead to print after the layer of immiscible fluid has been applied over the printhead so that ink ejects through the immiscible fluid while non-used nozzles remain capped by the immiscible fluid layer.

Abstract: In one example, a method for wiping the face of a printhead includes wiping across the face of the printhead and then wiping along the face of the printhead with a web of cleaning material. In another example, a wiper for wiping a face of a printhead includes a rotatable shaft having an axis of rotation and a helical blade affixed to the shaft. The helical blade is simultaneously rotatable on the shaft against the face of the printhead and translatable along the face of the printhead in a direction parallel to the axis of rotation.

Abstract: In one example, a wiper for wiping the face of a movable printhead includes a stationary blade oriented perpendicular to the direction of travel of the printhead and spanning the path of the printhead.

Abstract: In one example, a wiper for wiping the face of a movable printhead includes a stationary blade oriented perpendicular to the direction of travel of the printhead and spanning the path of the printhead.

Abstract: A method to control a printer carriage in which the printer carriage is controlled to move along a first axis at a first predetermined speed when a printhead, installed on the printer carriage, is ejecting printing fluid in a print zone. The printer carriage is moveable bidirectionally along the first axis in swaths to enable the printhead to print in the print zone. The printer carriage is also controlled to move along the first axis at a second predetermined speed, higher than the first predetermined speed, when the printhead is not ejecting printing fluid in the print zone.

Abstract: A method to control a printer carriage in which the printer carriage is controlled to move along a first axis at a first predetermined speed when a printhead, installed on the printer carriage, is ejecting printing fluid in a print zone. The printer carriage is moveable bidirectionally along the first axis in swaths to enable the printhead to print in the print zone. The printer carriage is also controlled to move along the first axis at a second predetermined speed, higher than the first predetermined speed, when the printhead is not ejecting printing fluid in the print zone.

Abstract: A method of determining a delay value by an image forming system may include transporting a media along a media transport path by a media transport unit, heating the media by a heating unit, providing a plurality of print passes across the media transport path by a print head assembly, and applying ink to the media to form an image including a plurality of swaths by the print head assembly such that a respective swath is formed on the media corresponding to a respective print pass. The method may also include detecting a temperature of the media by a temperature module to determine whether the detected temperature is outside of a target temperature range, and determining a delay value by a delay determination module in response to a determination that the detected temperature is outside of the target temperature range.

Abstract: A method to control a printer carriage in which the printer carriage is controlled to move along a first axis at a first predetermined speed when a printhead, installed on the printer carriage, is ejecting printing fluid in a print zone. The printer carriage is moveable bidirectionally along the first axis in swaths to enable the printhead to print in the print zone. The printer carriage is also controlled to move along the first axis at a second predetermined speed, higher than the first predetermined speed, when the printhead is not ejecting printing fluid in the print zone.

Abstract: A printing system with adaptive printhead temperature control, comprises a least one printhead for inkjet printing; heating means to heat said printhead or ink in said printhead to a predetermined temperature range; and control means to analyze content information of a print job to be printed, wherein said control means sets said predetermined temperature range and sets a heating power of said heating means at a given position of said printhead in accordance with content information relating to an entire print page of said print job, or a plurality of print pages of said print job.

Abstract: A method to control a printer carriage in which the printer carriage is controlled to move along a first axis at a first predetermined speed when a printhead, installed on the printer carriage, is ejecting printing fluid in a print zone. The printer carriage is moveable bidirectionally along the first axis in swaths to enable the printhead to print in the print zone. The printer carriage is also controlled to move along the first axis at a second predetermined speed, higher than the first predetermined speed, when the printhead is not ejecting printing fluid in the print zone.