Magnetic puzzle box geocache

prusaprinters

<p>I designed this puzzle for a geocache. It's heavily inspired by RWReese's design, and it opens the same way; you have to smack the puzzle to get ball bearings to jump from one magnet to another, unlocking the cache. Once unlocked, it slides open to reveal a standard "bison" container which holds the log sheet.</p> <p>The base of the puzzle has six rare earth magnets so that it can be directly stuck to a metal surface.</p> <p>You'll need:</p> <ul> <li>Eight 3/8" x 1/10" rare earth disc magnets (I purchased mine at Lee Valley, part #99K32.03)</li> <li>Two 3/8" steel ball bearings (I bought steel slingshot ammo from Canadian Tire)</li> <li>And glue to permanently attach the magnets in place (I used two-part epoxy)</li> </ul> <p>Make sure the holes are clean - the magnets should sit flat in the bottom of the holes, and the ball bearings should freely move in the holes without sticking.</p> <p>When gluing the magnets in place, be careful not to get any glue on the sides of the holes that might cause the ball bearings to jam. I suggest sticking the two halves of the puzzle to a metal surface, to keep the magnets in place at the bottom of the holes when the glue dries.</p> <p>OpenSCAD design file is attached. Enjoy!</p> <h3>Print Settings</h3> <p><strong>Printer:</strong></p> <p>AM8</p> <p class="detail-setting rafts"><strong>Rafts: </strong> <div><p>No</p></div> <p><strong>Supports:</strong></p> <p>No</p> <p class="detail-setting resolution"><strong>Resolution: </strong> <div><p>0.15mm (suggested)</p></div> <p><strong>Infill:</strong></p> <p>Minimum 25%</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>Sliced using slic3r prusa edition.</p> I used PLA plastic, a 0.15mm layer height, 3 walls, 4 top/bottom layers and 30% grid infill. </div></p></p> Category: Puzzles