This Gothic Trefoil with Dagger subdivisions shows you when your Prusa i3 MK3 3D printer is extruding filament, retracting it, or doing nothing with it. https://youtu.be/5cWGoj7Rs7k shows this indicator in action.
Print this thing in a light color PLA and glue a magnet to it to make an Extruder Motion Indicator that shows off your Gothic side (see details below).
TrefoilWithDaggers.FCStd is the FreeCAD design file I created for this Thing. That file has extra Sketches that walk through the steps of designing the Trefoil. Just open each sketch in turn to see the details.
Remember to come back and post what you've printed as Make.
It's good for the designer and the community (that means you)!
To post a Make, come back to this Thing and click Post a Make.
Or, you can use the Thingiverse Mobile app found on
and the Apple App Store.