Potentiometer Knob
thingiverse
Print your knobs upside-down, just as shown in the preview, without any supports needed. I highly recommend printing multiple knobs at once to ensure sufficient cooling of the layers. Designed specifically for this potentiometer: https://www.conrad.de/de/leitplastik-potentiometer-mono-50-k-tt-electronics-ab-p160kn-0fc20-b-50-kr-1-st-452798.html (Or equivalent 6mm shaft potentiometers) Feel free to experiment with the settings in the SCAD file; they are optimized for my Kossel printer using Slic3r.
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