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

By Andreas Gebhardt, Jan-Steffen Heotter

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2 Generation of Layer Information simul­taneously on the platform. In some AM processes the components are placed into and one above each other. 6 Data flow during additive manufacturing Third-party software contains optional features that allow, for example, the derivation of 3D data from 2D sketches. Some of this software is just used to display the 3D model. This kind of software is trimmed of the needed features of CAD software and can transform the model into the STL format. When the model is included with the geometrical and directional information, it is necessary to establish the machine and material parameters required for the control of the rapid prototyping process in order to proceed with the building process.

B) Colors: Colors are defined by red, green, blue, and the alpha channel. Each channel is assigned a value between 0 and 1, which indicates the intensity of the color. These values may exist as constants or made as a formula depending on the geometrical location. The alpha channel controls the transparency and allows subordinate colors to shine through. The element can be used on materials, objects, volumes, vertexes, or triangles. The rank order of colors is reversed such that the color of a triangle has the highest priority.

This contributed to the fact that this process, long before it was discovered for ­additive manufacturing, was used for shading and thus for the visualization of three-dimen­sional CAD lattice models. Decisive for the establishment of the STL format as an interface for additive manufacturing was the early publication of the interface formulation. The STL interface, which has been known since then as the ste­reolithography interface, could be used by both machine manufacturers and free software businesses.

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