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3D Printing for Architects with MakerBot by Matthew B. Stokes

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Learning about Selective Laser Sintering

SLS fuses small particles of material (plastic, metal, ceramic, or glass) using a high- powered laser. The technique is similar to SLA printing in such a way that the laser traces the cross-sectional shape before a platform descends. Perhaps the biggest advantage of SLS printing is that the granular material supports the top layer of material, giving rise to part geometry not previously possible using SLA printing without some sort of supporting structure created underneath the model.

An example of this is illustrated in the following image in the printing of one side of an inverted two-dimensional triangle. If the internal angle of the pyramid is low, there is enough material in the bottom layer for the ...

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