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The build direction is the z-direction of the Principal Coordinate System. For each scenario the Build Direction can be easily rotated and is then used for the Design Rules as well as material properties.
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View from underneath wit the corresponding support structures in Simufact Additive:
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In the following graph the influence of the strategies is illustrated. It can be saved up to 78% of support volume with activated Support Reduction. As a trade off the mass of the part increases. Because more material is used the part gets a little bit stiffer.
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