Tag Archives: rubik cube

Revising the 3x2x1 Rubik’s “Cube”

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3x2x1 Rubik's Cube

3x2x1 Rubik's Cube

I finally found the time to print a copy of my 3x2x1 Rubik’s Cube.  Having printed it, I’d make a number of improvements in the next design iteration.  I would:

  • Make the circular slots in the center cubes smaller or the circular tabs in the four outside cubes larger.
  • Enlargen the holes for the nut and bolt.
  • Make these cubes solid so that they slide against each other easier.1
  • Consider replacing the entire nut/bolt requirement with a connection similar to the becco block connectors.  This would make for a totally printable solution.
  • Print the cubes two at a time to minimize warping without a heated build platform.

It slides reasonably well and is certainly functional.  However, after several center cube rotations I will tighten the center bolt.2

  1. The four cube sections at the extremities are hollow. [↩]
  2. The hole for the nut is tight enough that it doesn’t rotate as I turn the bolt. [↩]

A MakerBot printed 3x2x1 Rubik’s Cube!

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Lotu's print of the 3x2x1 Simplified Rubik's Cube

Lotu's print of the 3x2x1 Simplified Rubik's Cube

SWEET.  I’ve been so busy of late123 that I haven’t even been able to print several of the things I’ve uploaded. I’ve uploaded several cookie cutters, with another sitting on my hard drive and one more knocking about in my head keeping the cobwebs company.  I’ve also uploaded my variation on a simplified Rubik’s cube.

Well, someone printed it!  It looks AMAZING!  I wonder if it works properly?  I slapped the design together rather hastily after getting frustrated with my MakerBot failing to print TomZ’s 1x2x3 Rubik’s cube.4

I can’t wait to either get some feedback from Lotu (who printed it) or print up one of my own so I can improve on the design.  I’d really like to make a version that is 100% printed – with a snap joint in the middle rather than a nut/bolt system.  If I go down that route, I was thinking about incorporating what I learned from the fantastic Becco blocks connection system by r3becca.

If you print one of these, please answer the following questions:

  1. Which STL did you use?  The one with all 6 pieces or the one with 3?  Would you prefer printing the pieces one at a time?
  2. How well did they fit together?  Are they very snug?  Too loose?
  3. How well does the nut/bolt work?
  4. Did you have to adjust your Skeinforge settings at all?  Why?  How?
  5. Do you have giant hex wrenches like Lotu does?
  1. Mostly writing nonsense. [↩]
  2. Which is particularly funny since my day job consists almost entirely of writing. [↩]
  3. Which is even funnier when you consider that you can tell I’m doing a particularly good job when my writing is completely incomprehensible. [↩]
  4. Did you catch how I swapped all the numbers around to differentiate my derivative?  I thought that was pretty clever… [↩]