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Tetrahedron 2

by dennedesigns, published

Tetrahedron 2 by dennedesigns Jul 16, 2015
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200Views 105Downloads Found in Math

Summary

Update 2/26/2015 Thanks to DesignMakeTeach for suggestions for improving this model. I've redone the model with these in mind. New file is tetrahedron_keller_2016.stl.

This model is the tetrahedron defined by equations y=−6, z=0, z=x+4, and 2x+y+z=4. The equations are printed on the model.

This model was designed and printed by my WLU summer research student Ryan McDonnell ('17). See http://mathvis.academic.wlu.edu/2015/07/14/tetrahedra/ for more information.

Instructions

You may have to scale by a factor of 10 if you're using MakerWare, since it tends to import files in mm, not cm. Object is sized to be 12cm in the longest dimension, but smaller prints should work just fine.

This object was made on a MakerBot2X. We used the following settings:
2 shells
0.20mm layer height
10% infill (hexagonal pattern)
No supports
raft off

We printed the object with the z=0 face as the base. Thus, we needed to add some ABS juice to the build bed to be sure the object stuck and didn't curl up at the corners.

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Howdy,

Printing the model and had a little feedback during slicing.

Bottom of model does not appear to be flat when imported into slicer. Slight rotation in model as saved causes one corner to be printed first. Layers view (gcode visualizer) in Cura shows issue. Lay flat command in Cura aligns model properly for printing. Can cause issues with bed adhesion when printing the model.

Model imports in at a z height of 402.428 mm which is outside print volume of most consumer 3D printers. Users can rescale but inexperienced users might not know how to change or could scale too small for equation on bottom surface to be read.

Thanks for posting.

I've now redone the model to be the correct size, should import as 12cmx6cmx4cm. Rotation problems also corrected. Thank you so much for the feedback.

Thanks for letting me know about these issues. This was one of our earlier designs. I'll check it out and make the necessary fixes later this week.

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