End of filament sensor Bowden Edition (run-out sensor)

thingiverse

I recently came across an interesting remix of a bookmaker's end of filament sensor switch that caught my attention. The original design, available on Thingiverse (https://www.thingiverse.com/thing:1134134), impressed me with its well-designed mount. However, I found it to be somewhat limiting for my specific setup. My 3D printer features bowden tubes running from the filament dry box into the case, through the extruder, and eventually reaching the hot end. This unique configuration made it difficult to get the sensor switch working properly. To overcome this challenge, I decided to add a view window that doubles as a directional arrow, providing an essential visual cue for setup. The modification requires only two M3 nuts and two M3 screws, which are easily spliced into the bowden tube. The rest of the process is relatively straightforward and can be completed by following the provided guide (https://nutz95.wordpress.com/2017/03/10/filament-change-module-runout-sensor-for-reprap-3d-printers/).