6 Piece Burrs with Rotating Stick

thingiverse

Puzzle description: To open a standard 6 piece burr you perform only moves of a singele piece (or a group of pieces) which must be parallel to one of the three axis of the burr. Here you have one rotating stick which behaves differently: It can be rotated by 90 degrees in-place. This is the first step of disassembling the burr. All later moves are as usual. Sticks for the burrs are numbered with the system of Jürg Känel (described here: http://www.robspuzzlepage.com/interlocking.htm#identifying) wich is also used by the Printable Puzzle Project (https://www.puzzlehub.org/). To allow the necessary rotation we need a special modification for the stick no. 1024. The two middle cubies are rounded: not to a stick with circular cross-section but we use a Reuleaux triangle. Otherwise the rotating stick gets stuck. The modified stick gets the name 1024B. Using the provided burr sticks you can construct eight different burrs, all containing the modified stick 1024B. Burr 1: Sticks 103, 359, 871, 928, 975, and 1024B Burr 2: Sticks 103, 615, 792, 824, 928, and 1024B Burr 3: Sticks 359, 615, 911, 975 (2x), and 1024B Burr 4: Sticks 52, 188, 615, 928, 1007, and 1024B Burr 5: Sticks 3, 568, 928, 975, 976, and 1024B Burr 6: Sticks 103, 188, 615, 824, 1007, and 1024B Burr 7: Sticks 103, 359, 911, 975, 1007, and 1024B Burr 8: Sticks 103, 792 (2x), 871, 888, and 1024B The burrs with rotating stick can be found in the foolowig Chinese puzzle blog: http://bbs.mf8-china.com/forum.php?mod=viewthread&tid=97179. The numbering used there compared with our numbering differs by 1. If you can read German: Mehr Informationen gibt es in https://welt-der-geduldspiele.blogspot.com/search?q=3D-Druck Puzzle difficulty: These burr puzzles with rotating stick are comparably difficult to standard six piece burrs. Disassembling is easy after you have opened the rotating stick. Assembling is similar because you have to close the rotating stick in the very last step. Without this rotation you just have to assemble a burr with a slightly different form (see photo with "open" stick). All the stickes were modeled using PuzzleCad (https://www.thingiverse.com/thing:3198014) by Aaron Siegel. The stick 1024B is a modified variant of stick 1024. Printing instructions: Easy to print. Individual STL files are provided for the different pieces so you can print them in different colors. Prints are fine with no supports. I printed the puzzle in PLA at 0.1 mm layer height.