This is nearly identical to my prior version http://www.thingiverse.com/thing:3485 . It's been slightly altered so that instead of totally hollow external cubes the interior sides come up to a point - so that there is a minimum 45 degree angle support for the top part. The next version I upload will have totally solid cubes with additional improvements discussed in this blog post http://makerblock.com/2010/08/revising-the-3x2x1-rubiks-cube/
All parts are contained within a single STL. Make sure your build platform is centered as closely as you can - the STL is nearly as wide as the full platform. Before converting to GCode, I used RepG to center the STL - you should too just in case.
For more reading about this puzzle cube and other nifty stuff, check out my blog at http://MakerBlock.com
- Print the STL containing all parts.
- Drill out the holes in the two center pieces so that an M3 nut and an M3x16 bolt will fit into either side.
- Slot two end cubes into either center cube.
- Bolt the two halves together.
- Affix colored stickers or, as I did, glue colored pieces of paper.
- LRR. http://makerblock.com/2010/06/skeinforge-ui-suggestions/#identifier_0_1590