Triangle Labs Filament Runout Sensor Top Rail Mount

thingiverse

This is an upgraded filament runout sensor mount that I discovered on Thingiverse for the Traingles Lab Sensor. I customized it to screw onto the top 2020 rail of my printer beneath the spool. This solution only works if you have your spool mounted at the top of your printer. Install T-nuts in the pre-drilled holes first, then fasten the holder by screwing into the openings that match up with the part. You can slide this close to your spool as desired and secure it in place. There's a tapered guide designed to minimize filament stress. I use this setup without a Bowden tube since my Ender 3 is equipped with a Basaraba direct drive, allowing the filament to run directly from the sensor into the extruder.