Tetrahedron Gantry Concept
by coelestinian, published
This is just an idea. I don't know how feasible it is, or whether it's worth building or calibrating. In fact, I don't know almost anything about it...
It's a somewhat different 3D gantry design based around a tetrahedron. There are three axes, belt-driven or what-have-you, and each is connected by a sarrus linkage to the end platform.
I like it because it's extremely stable (tetrahedron) and every axis is exactly the same.
However, (1) it needs complex maths, (2) there's a large footprint, and (3) nobody's actually tried it.
1) Make it more of a tetrahedron instead of a right-angled pyramid thing.
2) Design actual files.
3) Print and assemble.
4) Be astonished (hopefully) at amazing stability and resolution!
(As for the OpenSCAD file, open and animate it at around 20 FPS, 180 steps)