Hilbert Cube
Description
After trying and failing to do it in openscad, I worked around it's limitations by writing a ruby script that generates openscad code. This ruby script can create a 1-3 iterations of a hilbert curve in 3d. I borrowed code from a Processing script by Thomas Diewald at openprocessing.org/visuals/?visualID=15599
Unfortunately after doing this, I realized it wasn't really a hilbert cube as the shape is not one continuous curve. :( Still it looks cool and is pretty much impossible to print without dissolvable support. It would be awesome if someone smarter than me would make a proper parametric hilbert cube generator, plz!
I also found a really nice and proper curved hilbert cube by Carlo H. Séquin at cs.berkeley.edu/~sequin/X/Hilbert_Cube/ I resized it and made a support model for it. I don't know what the license is on it, hopefully he won't mind me reposting it here. The problem with this model is that it is curved in a way that makes it a more difficult print.
See also this hilbert cube print from shapeways: youtube.com/watch?v=9cdWpQ2D-O8
Instructions
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Can anyone with a dualextruder right now load PVA in one size, PLA in the other, and have this work out of the box? Or did you need to do some modifications to make this work? I'd love a blog post.
Another awesome job Tony! 8-) :)
There are three polishers/agitators at the BotLair from Project Shellter. Put your part and water in a ziploc bag and toss into one of them. The agitation should speed up the dissolving time considerably!
can you post a video of this being printed I would love to see your set up in action!! Keep up the cool work !!
Instead of going for full dualstrusion with two stls, couldn't you just enable SF's support feature and include the extruder switch in suppoert_start.gcode and support_end.gcode? It would be a) automated and b) use less PVA, since SF generates light support and uses it only where neccesary.
Oh that is too cool!! What do you have the dual extruders on? Is that a mix of PLA and ABS?
Have you tried any other materials for dualstrusion? I did some research on rubber-like materials (for things like one piece printed hinges or water tight gaskets.) have you looked into thermoplastic-elastomers? I've only seen it sold in pellets. I figured if anyone in the 3d printer community would know it would be the renown Mr. Buser.