Ender 3 Optical Filament Runout Sensor Mount

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4309535.

This sensor mount remix is designed to use the same sensor the Prusa MK3 uses since the PCB is easy to buy on Amazon, Aliexpress, etc.

The mount uses the same screws mounting screws used to secure the trapezoidal nuts. You'll need an M2 x 8mm screw (usually included with the sensor kit) to attach the PCB to the mount. I suggest adding two small pieces of PTFE tubing to the mount since they'll prevent light from getting into the sensor and accidentally triggering it.

I've included the native design files in case anyone would like to modify the design to fit their printer.