3D Chain Link Rings

by Neufrank, published

3D Chain Link Rings by Neufrank Oct 15, 2011
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I just started learning how to use OpenSCAD and this is my first creation. Making this also reminded me of some forgotten trigonometry to get the angles right between openings. The angle between the diagonal of a cube and the base is the arccosine of the square root of 2/3. The angle between the diagonal of a cube and an edge is the arcsine of the square root of 2/3.

I would love to see someone make this on a 3D printer. However, I am just learning about the technology and don't know if it is even printable.

These units can also be interlocked in various ways in one, two and three dimensions (at least on a computer). A sort of three dimensional chain might be made.

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What program did you use?

It should be possible to print it on a 3D printer, but it would probably be on one of those that prints laying down a thin layer of powder, 'drawing' with a liquid glue, adding another thin layer of powder, drawing, layering and so on. The item i lifted out of the powderand shaken clean, and the remaining powder is reused on the next print.

Printing on a RepRap or similar wouldn't be possible without either adding lots of support structures, or rebuilding the printer for powder-based printing.
(Powder-based is probably not as accurate as the direct-pastic extrusion used on a RepRap)
A pity, for this looks like a really awesome design
(In other words; could someone please disprove me?)

I have had such a blast relearning Trigonometry for my models.

More material would be used for support than for the print itself. Very cool model, though. :)