Abstract: In an example, a data unit includes a mounting to removably mount the data unit on a receiving portion of an additive manufacturing build material container, a data source to provide data comprising a plurality of additive manufacturing parameters and a communications interface to communicate with a reader of an additive manufacturing build material processing apparatus. The communications interface is to transmit data from the data source to the additive manufacturing build material processing apparatus.

Abstract: In an example, a data unit includes a mounting to removably mount the data unit on a receiving portion of an additive manufacturing build material container, a data source to provide data comprising a plurality of additive manufacturing parameters and a communications interface to communicate with a reader of an additive manufacturing build material processing apparatus. The communications interface is to transmit data from the data source to the additive manufacturing build material processing apparatus.

Abstract: In an example, a data unit includes a mounting to removably mount the data unit on a receiving portion of an additive manufacturing build material container, a data source to provide data comprising a plurality of additive manufacturing parameters and a communications interface to communicate with a reader of an additive manufacturing build material processing apparatus. The communications interface is to transmit data from the data source to the additive manufacturing build material processing apparatus.

Abstract: The present subject matter describes a heating unit. The heating unit comprises a heating element and a controlling unit coupled to the heating element to determine a desired value of a direct current (DC) voltage based on heating element parameters. The desired value is a value of DC voltage desired for operation of the heating element. The controlling unit computes a value of a duty cycle parameter based on device input parameters and the desired value of the DC voltage. The heating unit further comprises a power factor correction (PFC) unit coupled to the controlling unit and the heating element to convert an input alternating current (AC) voltage, received by the PFC unit from an AC supply, to a direct current (DC) voltage of the desired value based on the duty cycle parameter. The PFC unit provides the DC voltage to the heating element.

Abstract: In an example, a data unit includes a mounting to removably mount the data unit on a receiving portion of an additive manufacturing build material container, a data source to provide data comprising a plurality of additive manufacturing parameters and a communications interface to communicate with a reader of an additive manufacturing build material processing apparatus. The communications interface is to transmit data from the data source to the additive manufacturing build material processing apparatus.

Abstract: In some examples, a media stacker includes a drawer defining a chamber, and a plurality of moving elements to engage media sheets of different sizes as the media sheets are output from a system. The plurality of moving elements are to slide the media sheets to a target position in the drawer, and the plurality of moving elements are to disengage from the media sheets once the media sheets have reached the target position. A plurality of retaining elements are to engage the media sheets of the different sizes as the media sheets slide into the drawer.

Abstract: The present subject matter describes a heating unit. The heating unit comprises a heating element and a controlling unit coupled to the heating element to determine a desired value of a direct current (DC) voltage based on heating element parameters. The desired value is a value of DC voltage desired for operation of the heating element. The controlling unit computes a value of a duty cycle parameter based on device input parameters and the desired value of the DC voltage. The heating unit further comprises a power factor correction (PFC) unit coupled to the controlling unit and the heating element to convert an input alternating current (AC) voltage, received by the PFC unit from an AC supply, to a direct current (DC) voltage of the desired value based on the duty cycle parameter. The PFC unit provides the DC voltage to the heating element.

Abstract: In some examples, a media stacker includes a drawer defining a chamber, and a plurality of moving elements to engage media sheets of different sizes as the media sheets are output from a system. The plurality of moving elements are to slide the media sheets to a target position in the drawer, and the plurality of moving elements are to disengage from the media sheets once the media sheets have reached the target position. A plurality of retaining elements are to engage the media sheets of the different sizes as the media sheets slide into the drawer.

Abstract: A drawer defines a chamber to receive a media sheet from a system. A moving element is to engage the media sheet as the media sheet is output from the system. The moving element is to slide the media sheet to a target position in the drawer, and the moving element is to disengage from the media sheet once the particular media sheet has reached the target position. A retaining element is to engage the media sheet as the media sheet slides into the drawer.

Abstract: A drawer defines a chamber to receive a media sheet from a system. A moving element is to engage the media sheet as the media sheet is output from the system. The moving element is to slide the media sheet to a target position in the drawer, and the moving element is to disengage from the media sheet once the particular media sheet has reached the target position. A retaining element is to engage the media sheet as the media sheet slides into the drawer.

Abstract: A sheet scanner comprises a sheet inlet on a front side, a scanned sheet outlet on a rear side, and a deflector to direct scanned sheets from the outlet towards the front side of the scanner, over the top cover thereof, and further comprises a stopper on the top cover, at the front side of the scanner and above the sheet inlet, to temporarily restrain the leading edge of a scanned sheet such that the sheet advances and folds over itself and beyond the stopper, the leading edge being released from the stopper when the sheet folded over itself and beyond the stopper pulls it downwards.

Abstract: A system having a low power operation mode and a normal operation mode, the system including a power supply unit for supplying at least a first voltage and a second voltage; a first circuit which operates during the normal operation mode but does not operate during the low power operation mode; a second circuit which operates during the low power operation mode; and a switching unit for selectively supplying the first circuit with the first voltage or the second voltage from the power supply unit; wherein the power supply unit supplies a power status signal and the switching unit is controlled based on the power status signal.

Abstract: A sheet scanner comprises a sheet inlet on a front side, a scanned sheet outlet on a rear side, and a deflector to direct scanned sheets from the outlet towards the front side of the scanner, over the top cover thereof, and further comprises a stopper on the top cover, at the front side of the scanner and above the sheet inlet, to temporarily restrain the leading edge of a scanned sheet such that the sheet advances and folds over itself and beyond the stopper, the leading edge being released from the stopper when the sheet folded over itself and beyond the stopper pulls it downwards.

Abstract: According to one example, there is provided a controller readable medium on which are stored controller readable instructions. The instructions are such that, when executed by a controller, perform the steps of commencing the printing of a print job on a media sheet, determining when about half of the media sheet ejected out of a printer media output is at the level of a stacker unit, activating a first array of fans to retain a portion of the ejected media sheet, completing the print job, and activating a second array of fans to blow the trailing edge of the ejected media sheet over the stacker unit.