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Snap-together polyhedron verticies

by mrule, published

Snap-together polyhedron verticies by mrule Nov 24, 2010

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Description

update : a revised script and set which includes 4,5 and 6-fold vertices ( slash facets, not sure which to call these ) can be found at thingiverse.com/thing:4934 and thingiverse.com/thing:5028.

These two triangular pieces can be assembled into any polyhedron based on equilateral triangles. This includes tetrahedra, octahedra, icosahedra, and many others.

The structure of the pieces is such that they resemble both faces and vertices, so the octahedron is also cube-like, and the icosahedron also looks like a dodecahedron. ( a tetrahedron is self-dual, so that doesn't count ).

Recent Comments

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Can you publish the openSCAD file so we can tweak the design?

No, that's correct. These were designed for the elasticity of ABS and don't really work correctly with PLA.

Maybe I printed too many walls (2) or too much infill (30%), but I can snap them together only under hot water (PLA). They make a very nice connection though. Inseparable (when cold) and frictionless.

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Instructions

Print out two each of Y1 and Y2, assemble into tetrahedron
Print out four each of Y1 and Y2, assemble into octahedron
Print out ten each of Y1 and Y2, assemble into icosahedron

A range of other shapes are possible. I believe the C60 buckyball is possible with these elements.

Comments

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maxy on Jul 26, 2012 said:

Maybe I printed too many walls (2) or too much infill (30%), but I can snap them together only under hot water (PLA). They make a very nice connection though. Inseparable (when cold) and frictionless.

mrule on Jul 26, 2012 said:

No, that's correct. These were designed for the elasticity of ABS and don't really work correctly with PLA.

pogden on Nov 21, 2011 said:

There is a self intersection where the male connector meets the body. OpenSCAD will not import this file. Can you please either fix this problem of upload the .scad source so I can.

Anonymous on Nov 21, 2011 said:

Is this something that can be fixed in Meshlab? I am not sure I can find the original file -- I don't have time to track it down right now, maybe later today. Sorry about the importing problems.

tc_fea on Apr 1, 2011 said:

my younger son took one, so I had to make another. :)

cyberbadger on Dec 2, 2010 said:

I made a nice structure using these parts, I only used Y1.stl and Y2.stl.

Printed on a UP! printer, (pp3dp.com).

-cyberbadger

cyberbadger on Dec 2, 2010 said:

I guess I made your C60 buckyball!

WilliamAAdams on Nov 25, 2010 said:

This looks very simple and fun. What did you use to do the modeling?

mrule on Nov 25, 2010 said:

openSCAD

Zomboe on Nov 25, 2010 said:

Cool idea! And nice print quality.

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