Encoder wheels to be used with fork sensors/fork light barriers. 2D: Generate an encoder and export the file. As open scad currently only exports lines you need to fill the interrupter areas in a separate program (e.g. Inkscape), and make the lines as thin as you desire. Once done print it on a transparent sheet. Make sure to set your printer to print with maximum contrast. Even with those settings I had to print two layers in order to make it work reliably. 3D: !!!!not tested yet!!!! generate, print, enjoy