I took guru\'s very cool OpenSCAD file, cleaned it up, made it fully parametric, and fiddled with the parameters.

Specifically, the following parameters are different:

• I made the rings a bit thicker so the build quality is improved.
• The number of rings is now adjustable, and they are arranged in a circle.
• I played with the tilt of the rings and the distance between them so they didn\'t overlap. (necessary, since they are now bigger)
• The tor versions have had the cylinder section replaced with a toroid and have been further tweaked.

The ideal offset between rings could probably be calculated, but I don\'t feel like thinking that hard just right now. (Maybe in a future revision.)

I\'ve included here 3 and 7 ring sets. Up to 7 can be made before the first and last rings overlap. The toroid version has been tweaked so that 10 rings can fit and make a complete circle.

Guru\'s original design makes the ring out of a section of a cylinder, and I have left that version in the file. I have included a torus (revolved circle) version of the ring as well. However, the torus version, due to the slightly smaller perimeter, has a slightly worse surface finish. (I may tweak this and try a larger diameter later.)

Use the existing sets, or play with the parameters and make your own.
(If you find a combination of parameters that makes a nice non-overlapping set of a different number or size, post it!) I\'ll add other combinations here if people ask.

Note that this model may tickle bugs in the skeinforge-0006 fill and towering modules. The fill bug may cause some segments to be unnecessarily solid. Interaction between the fill bug and towering bug may cause the head to pass through a previous tower. One of my revisions had this problem, but the 3 ring version here seemed to work OK. (In other words, watch your build in case something goes wrong!)

The torus version has a slightly worse overhang than the cylinder version. Oddly, it seems to handle it better and sags less anyway.

I couldn't get skeinforge-0006 to slice ringsN10tor.stl at all. Version 7 seemed to work, but I haven't tried to build it yet. Note that this build is within 3mm of the full platform size, and may cause the head to move over the screws.