Reciprocal Reuleaux Triangle for FDM
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Description
The predecessor to this design featured a triangle inside a square hole within another triangle inside a square hole. It sounded nice but the square hole broke up the symmetry of the triangle, plus it didn't exploit the reciprocal capability of a reuleaux triangle to contain a square inside a triangular hole.
Instructions
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Very nice, but mine fell apart. Some minor curling on the corners of the triangle and square left it out of whack. :( I thought I had my curling and warping problems under control, but it seems to change every day.
Nicely done. Would it be possible to make it a little bit thicker so the parts don't threaten to pop out?
I can't seem to slice it with the inside square as a solid.
Both VisCAM View and NetFabb say there aren't any errors. The square is made with just 48 triangles, it's solid, it's watertight, and it's sliceable. The only oddity is its position, which is about 0.01mm higher than the other parts. Maybe your slicer is overlooking the solid face due to that minuscule offset. Does the next slice exhibit the same problem?
The solid objects in your graphic have 2 toolpaths around the 'solid' objects, but 3 paths around the square. The third path suggests your slicer is detecting the vertices but not finding the face so it's adding an inner boundary. Can you flip the model over and slice it from the opposite side?
Pretty! Wish I had thought of this!
But if you don't post an scad file, I might be forced to duplicate this and post it in the parent thing. :-P We must have our parametric model!
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Nice model, but mine falls apart. This might be partly due to using slic3r which seems to be more dimensionally accurate than skeinforge. When I look at the 3D view of the STL I can see the slop in the model that my actual printed object has.
The slicing process also rounds off the sharp edges of the convex parts (depending on your layer thickness) and the model itself relies on those sharp edges to have any hope of staying together.