Abstract: An additive manufacturing device calibration system and method. In laser control systems, such as the laser control systems used for SL and SLS 3D printers, the laser beam is moved to a location by applying a control value. Often the control value and the location of the laser beam are in different spaces. One calibration system and method involves the input of a number of control values and their corresponding laser beam locations, and the adjusting of the parameters of a mapping function such that the control values generated by applying the mapping function to the input laser beam locations best matches the corresponding input control values.

Abstract: A laser material processing system comprises: a housing defining an engraving chamber, an xy laser beam steering system, a non-telescoping focus mechanism, and a camera system that facilitates production of engravings that exceed the xy dimensions of the engraving chamber and/or facilitates placement of an engraving depicted in a software user interface in a specific location in the work area. The housing includes a removable bottom panel that allows processing of workpieces of infinite thickness. The focus mechanism includes a carriage mirror subassembly, a sliding member moveably attached to the carriage mirror subassembly, and a focusing lens subassembly attached to a lower portion of the sliding member. The carriage mirror subassembly and focusing lens subassembly are configured to receive and focus a laser beam to a focal point. The focusing lens subassembly is adjusted along a z-axis by vertically sliding the sliding member.

Abstract: An additive-manufacturing removable raft. Layers of material are sequentially deposited on a build platform. Portions of the perimeters of the layers are defined as bevel portions, the bevel portion of each layer after the first overhanging the bevel portion of the preceding layer to form an edge surface of the raft at an acute angle with respect to the build platform.