Filament Run Out Sensor - Lack Enclosure by Mattwall

Last crawled date: 3 years, 1 month ago

This is my filament run out sensor and guide tube for my lack printing enclosure. you'll also need 2 M3 screws x 12mm (although I used one 8mm long and one 12mm long), a limit switch with wheel like the image, a couple of short pieces of Boden tube, 2 extruder end Boden tube couplers (M6 thread), a small zip tie and enough wire to reach your main board. I'm not going to go over the firmware settings or connections to main board here as they are very well documented elsewhere and this is more about this design of sensor rather than a tutorial on how to add a filament sensor.
Once the main section has been printed, screw in the 2 Boden couplers and push in the short lengths of tube. Using one of the M3 screws mount the limit switch using the hole a the switch end (I had to slightly open up the hole in the switch itself to be free on the M3 screw), it should self tap as it goes in, don't fully tighten as the limit switch should have some movement. Add the other screw to the lower hole and this will be used for adjusting the senor. Use the small zip tie to secure the wires. Finally push in some filament as we need to adjust the switch position by using the lower screw until it clicks when filament is both inserted and removed.