u/o7j

Hi everyone, I managed to solve two problems in one with this little print.

Re-using the redundant z-limit switch sensor as a filament run-out sensor, and routing my filament nicely from my filament drying box via top gantry into my Sprite Pro. I remixed an existing file from Printables: https://www.printables.com/model/298272-ender-3v2-filament-runout-sensor and had the original idea from a 5yr. old post on here.

https://preview.redd.it/i2n7g61e0qah1.png?width=881&format=png&auto=webp&s=9052588e5285b0075669b6d91fdf2929fcfc2215

https://preview.redd.it/re4hpn0m0qah1.jpg?width=1500&format=pjpg&auto=webp&s=2e573c34dc5b39388840a23288335b6b6574715d

https://preview.redd.it/nutmon0m0qah1.jpg?width=1500&format=pjpg&auto=webp&s=75eb0568693c9cf70fb3aa08cf94dc39a929c18b

I extended the z limit switch cable and routed it in the extrusion grooves.

I am using a 4.2.2 board with Kilpper and Mainsail, and added the following into the printer.cgf file.

[filament_switch_sensor filament_sensor] 
switch_pin: ^PA7 
pause_on_runout: True 
runout_gcode: 
  PAUSE 
  M117 Filament runout! 
insert_gcode: 
  M117 Filament inserted

STL here: https://www.printables.com/model/1770029-ender3-v2-runout-sensor-with-top-mount-filament-gu