Open / Closed Sign

prusaprinters

<p>Inspired by Ikeda Yosuke's open/close sign design which relies on gravity and relatively frictionless joints, I decided to design one using planetary gears to drive the movement of the letters. An animation of the transition can be seen here: <a href="https://youtu.be/TmrUlpgojlY">https://youtu.be/TmrUlpgojlY</a></p> <p>The gears are made to snap fit onto their respective axles, tolerances for rotational and press fit parts have been confirmed and should work well with a properly calibrated printer.</p> <p>Updated 24/3/17:</p> <ul> <li>D in "closed" has finally been added to the design. Using the joiner.stl piece, the letter d should lay perfectly over the top of the c and the l. First glue the joiner to your gear_right in the correct position and then glue it to your letter d to allow proper alignment.</li> <li>Type has been refined a little bit, particularly on the letters e, d, c, and l.</li> </ul> <p>Updated 11/2/17:</p> <ul> <li>Registration points added for letters to attach to gears<br/> Split base plate for smaller build platforms (minimum build size required 160 x 160 mm)</li> <li>Refined font to remove sharp edges<br/> E and S/N has been chamfered on the bottom edge to avoid catching</li> <li>Planet gears and gear_left have been heightened by 1mm in order avoid contact with the axle<br/> gear_left has modified gears to only allow rotation in the direction such that letters don't touch each other.</li> </ul>