Two color triskelion design
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A multi-part triskelion that is similar to the traditional triple spiral pattern, but uses ellipses.
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I made some this design some time back to cut on a Cricut. It is based on a traditional spiral triskelion but with the spirals compressed into ellipses to match the curvature of the surrounding circle. The inner spirals look a little like horns. That was unintentional but I like the effect.
This 3D print was mostly for trying out an idea for glueless assembly using pegs.
Print the parts in two colors (or however you like) and assemble them as shown in the photos. You need one outer spiral, one triangle, and three each of the inner spirals and pegs.
The peg may require some force to fit through the series of holes. Be careful not to snap it. I found that I could hold the peg with pliers just outside the hole and push a few millimeters when it is stuck. Normally it pushes freely with a little friction. You might also be able to print a simple tool for it.
It is not intended to be disassembled once the pegs are in. You might be able to get them out if you try.
The first set of STL models are sized at 50mm and can be assembled easily at that size. I have scaled it down to 40mm (shown in the cover photo) and that was a lot more trouble to assemble but doable.
I have also scaled it to coaster size (90 mm) and have provided STL models at this size. It is uniformly scaled in planar coordinates, but with thickness set to 6mm. It has somewhat larger gaps as a result, but they are not very noticeable. I also adjusted the peg for a snug fit at this scale.