Abstract: Certain examples described herein relate to a carriage assembly for an additive manufacturing system. The carriage assembly comprises a movable carriage to move over a build zone of the additive manufacturing system, a thermal sensor device on the carriage to obtain thermal data associated with a region of build material in the build zone, radiation device on the carriage to apply radiation onto the build material. The radiation device is configurable between a preheating mode, to apply radiation onto the region of build material to raise a surface temperature thereof, and a fusing mode, to apply radiation onto the region of build material to selectively fuse at least part of the region of build material.

Abstract: Example implementations relate to an apparatus to control supplying power to a linear load; the power having a predetermined current profile; the apparatus comprising a controller to establish synchronisation information associated with an AC input voltage of an AC supply; and produce at least one pulse width modulation signal in response to the synchronisation information and a target instantaneous current of the predetermined current profile; and at least one output to output the at least one pulse width modulation signal to a current modulator for controlling current to the linear load.

Abstract: Certain examples described herein relate to a carriage assembly for an additive manufacturing system. The carriage assembly comprises a movable carriage to move over a build zone of the additive manufacturing system, a thermal sensor device on the carriage to obtain thermal data associated with a region of build material in the build zone, radiation device on the carriage to apply radiation onto the build material. The radiation device is configurable between a preheating mode, to apply radiation onto the region of build material to raise a surface temperature thereof, and a fusing mode, to apply radiation onto the region of build material to selectively fuse at least part of the region of build material.

Abstract: A method and system for causing an additive manufacturing system to print objects are described herein. A controller (110) of an additive manufacturing system (100) that comprises a build unit (120) and the controller (110) is arranged to receive print data defining an object to be printed by the additive manufacturing system (100). The controller (110) is arranged to cause the additive manufacturing system (100) to print a further object according to the modified print data, wherein the modified print data is determined on the basis of the print data.