filament runout optical sensor

thingiverse

This is a universal filament sensor designed to work seamlessly with every type of 1.75mm filament, regardless of color or clarity. I specifically created this for the Bq Hephestos 2, but it's compatible with any Prusa i3 style 3D printer. You can easily purchase an end stop sensor from Aliexpress: https://www.aliexpress.com/item/6-pcs-lot-Optical-Endstop-Light-Control-Limit-Optical-Switch-for-3D-Printers-RAMPS-1-4/32434841034.html?spm=a2g0s.9042311.0.0.27424c4dDT23Br. To set up the sensor, navigate to Configuration.h and search for the FILAMENT_RUNOUT_SENSOR define. Remove the comment from this line to enable the filament runout sensor feature. Here's my configuration file: // Uncomment to define a filament runout sensor that checks for the presence of filament #define FILAMENT_RUNOUT_SENSOR #ifdef FILAMENT_RUNOUT_SENSOR // Set to true or false, depending on your specific setup const bool FIL_RUNOUT_INVERTING = false; // Use internal pullup for filament runout pins if defined define ENDSTOPPULLUP_FIL_RUNOUT // Define the script to be executed when a filament runout is detected define FILAMENT_RUNOUT_SCRIPT "M600" #endif // FILAMENT_RUNOUT_SENSOR I used pin 57 for my setup, which you can find in my pins_BQ_ZUM_MEGA_3D configuration. For more information on configuring Marlin firmware, visit the official documentation: http://marlinfw.org/docs/configuration/configuration.html#filament-runout-sensor.