Sun Gears

by 67restomodder, published

Sun Gears by 67restomodder Jun 10, 2011
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After playing with both the Heart Gears http://www.thingiverse.com/thing:6291 and Gear Gears http://www.thingiverse.com/thing:6533, a good friend wanted something different. She liked the way the Heart Gears moved and is totally into solar power, so she asked if I could make gears that looked like a sun. Believe it or not, I am very new at this and had very little experience with OpenSCAD. I understood that if I could get an stl file of a sun it should be relatively straightforward. Unfortunately, I could not find a good one. However, I did find the Geek Campfire thing by jonschwartz http://www.thingiverse.com/thing:578, and thought it would look pretty cool if I put several of them around a squashed sphere. Voila! I made her one in translucent blue PLA (at her request) and now you can make one too. The image of the one I printed is an earlier revision (hence the flat ends of the two tallest gears), but I fixed that in this release. I have included an stl of the complete assembly, but only so you can see what it looks like.


Print one of each gear and one core. Attach the gears to the core with M3 screws (I used 18mm long ones) I included a couple of files with four gears on one plate if you have enough build area. I printed these with .35mm layers with one extra shell with reasonable results.

If you want to play with this in OpenSCAD, you will need to get the parametric involute gear v5.0 OpenSCAD file from http://www.thingiverse.com/thing:3575 and the Geek Campfire stl file from http://www.thingiverse.com/thing:578. Put both of these files in the same directory with sun_gears.stl and have fun (but don't get burned).

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Is there a particular order in which these gears are supposed to be assembled?

It has been a while since I built this, but I think I mounted the large gears first, followed by the small ones. I did it this way because none of the large gears mesh directly with other large gears -- each small gear meshes with three large ones.

Way to go; you picked a pretty tricky object as your first foray into OpenSCAD. Looks good!

Sun goes supernova when you twist it. Nice.