Arbitrary Burr Puzzle STL Engine Six-Piece, Parametric

thingiverse

I like brain teasers and especially burr puzzles since my childhood. Years ago I made the burr of Philippe Dubois from wood and enjoyed a 24-hour solving session. When I obtained my 3D printer, one of my first designs was a FreeCAD version of the same (included here). Now I created a six-piece burr "engine" in OpenSCAD. It accepts a matrix of zeroes and ones where a '0' represents an empty position in the 3D model. So besides the included two designs you may add your own description for a different puzzle. (Disclaimer: This is not a "generator", you should have a valid puzzle description to create a new STL...) Philippe Dubois (difficulty: 6.1) and Bill Cutler's "Buffling" Burr (difficulty: 5) are included. (You just need to uncomment one and comment the other one to switch in the scad file) I found the latter much easier to solve (it took me 15 min), anyway it was fun to solve it, as well. Bill's Buffling Burr needs support for one piece. The other one from my sets print well without support. Be careful with your new designs about support... I used 7 and 6 for unit size. It gives 14*14*42 and 12*12*36 mm pieces accordingly. You may also use different colours for different sets to not mix them afterwards. I won't include the solutions here, it is much more fun to find it out by yourselves. But they are available on the web for the impatient players. Some useful links on burr puzzles: https://www.craftsmanspace.com/free-projects/six-piece-burr-puzzles.html https://en.wikipedia.org/wiki/Burr_puzzle https://www.cs.brandeis.edu/~storer/JimPuzzles/BURR/3PieceTrickSegerblom/IbmPage.pdf