3x3 Bump Mod

thingiverse

I couldn't seem to find any mirror block puzzles that weren't extensions, so I decided to make one. The puzzle should turn well with minimal post-processing, assuming that your printer is dialed in nicely. I arranged all the pieces such that they should print optimally. I used a 3D printed core and some 3m screws to hold the centers down. I got some small springs off amazon to use, but some of the centers are too shallow to fit the springs so I just tightened those down till I could turn them freely but they weren't wobbly. The springs are 0.5x5x10mm. I don't know if a normal cube core would work, but the puzzle is made to be 56mm in size, so it might work nicely. The puzzle has two versions: a symmetrically bumped cube, and an asymmetrically bumped cube. The pictures without stickers are of the asymmetric cube, which is slightly more straightforward to solve. The symmetric version (shown stickered) can end up with parity, so it can be a bit more challenging! I included the broken-up sections and the entire object stl files. Prusa Slic3r can split the whole object stl files into separate objects if you wanted to group the pieces differently; I'm not sure if Cura has that same functionality. 11/17/2021: updated the clearance between the centers and the edges to eliminate weird gaps when turning. Added a png file for the symmetric bump stickers. The edge to edge length for the sticker png should be 53mm, so be sure to scale it correctly before cutting them out! 11/15/2021: updated the symmetric bump corners and core stl to provide better separation between the pieces.