Additive Manufacturing. 3D Printing for Prototyping and by Andreas Gebhardt, Jan-Steffen Heotter

By Andreas Gebhardt, Jan-Steffen Heotter

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In contrast, a slice file contains additional machine-specific information on the geometric data and is not exchangeable between the various additive manufacturing systems. All contour-oriented formulations define the contour cuts directly into the respective z coordinate of the 3D CAD model and cut at the mathematically precise object [Fockele, 94]. These constitute the 2D information. The established plotter software formats are based on HPGL files (Hewlett Packard graphic language) or similar standard formulations.

The AMF format is struggling to gain broad acceptance, though has not yet among the major manufacturers. joining this layer with the preceding one (z direction). Joining the layers in the z direction with one another is achieved in the same way as joining them in the x-y direction, with the exception of layer lamination processes. The energy or the amount of binder necessary for the joining is proportioned in such a way that not only the layer itself but also part of the preceding layer is affected and thus joined to the new layer.

The advantages of both model types are combined in so-called hybrid models, which include elements of the basic solid as well as those of the surface model. 2 Generation of Layer Information models usually generate faultless STL data, as the edges of the surfaces used for the issuing are exactly fitted by the system itself when the resulting hybrid model is generated. 2 Demands on CAD Systems When judging CAD systems as the basis for additive manufacturing processes, many of the properties discussed in the preceding as possible should be taken into consideration.

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