Ball in Vine

by stevemedwin, published

Ball in Vine by stevemedwin Jul 4, 2013

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Here's the recipe for how I designed this thing: Start with two concentric spheres, one larger than the other. Use a big "move" brush to push parts of the outer sphere into the inner sphere, revealing the surface of the inner sphere. Continue nudging the outer sphere until an interesting network of surfaces or a vine is showing. Subtract the inner sphere from the outer sphere leaving just the vine. Remesh or retopologize as necessary to clean up the mesh. Finally add a smaller sphere inside the remaining vine. If the sphere doesn't touch the vine, then it will freely move once it's printed. A blast of compressed air (like Dust-Off) will get the sphere spinning pretty fast! It also can glide on a smooth surface like a desk or table.

Update: I have uploaded the vine and ball as separate files in case someone wants to try printing each in a different color. I don't have a way to test this so if it works, please upload a photo. If you want to print in one color, do not use these separate files.

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I uploaded separate files for the ball and vine. Please let me know if this works. I opened them in another CAD program and they look aligned.

I try it out and let you know when I post the files.

The files have X/Y/Z coordinates, so they'll be aligned. Just don't move the parts around manually...

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I used ReplicatorG to prepare the file, a MakerBot Replicator2 with the Replicator 2 slicing defaults and the following settings with white MakerBot PLA to do the printing:

Infill = 10%
Layer Height = 0.200
Shells = 1
Feedrate = 40
Travel Feed = 55
Temperature = 220

I used a raft with full support. Be patient removing the support structure as the clearance between the sphere and vine is pretty tight.


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JeppeHMikkelsen on Jul 13, 2013 said:

I would be cool with one where the vine and the ball are different files so you can use two colors

stevemedwin on Jul 14, 2013 said:

If they are two separate files, how do you set up the registration so they print correctly? Alternatively, you could color the vine with paint markers or even spray paint (after masking the ball) after printing.

ThePelton on Jul 13, 2013 said:

You could use this method to make multiple nested spheres, just like the Chinese carve from Ivory, leaving round holes by which you can see each smaller, more inside, sphere.

stevemedwin on Jul 13, 2013 said:

I tried something like that. I duplicated the "vine" three times, shrinking each one so they nested. However I didn't shrink them enough because some are fused and won't move independently. I'm not sure whether to continue on that path or try something else.

Thanks for your comment.

pp3dpNL on Jul 13, 2013 said: