Cheap and Easy Filament Out Sensor box

thingiverse

It appears you've provided a tutorial on how to set up and test a filament sensor for a 3D printer using Octoprint. I'll break down the steps into sections. ### Configuration 1. **Before Print Job**: Add the following lines: ``` G60 S0 ; save current position to S0 G91 ; set to relative positioning G1 E-1 F300 ; retract the filament a bit before lifting the nozzle, to release some of the pressure G1 Z+2 F{travel_speed} ; move Z up a bit G28 X0 ; move X to min endstops, so the head is out of the way M104 S0 ; extruder heater off M140 S0 ; heated bed heater off (if you have it) M84 ; disable motors M117 Change Filament ; Put printing message on LCD screen ``` 2. **Before Print Job Resumed**: Add the following lines: ``` G90 ; set to absolute positioning G61 S0 ; restore position ``` ### The Real Test 1. Prepare the Printer: Ensure the printer is ready to print. 2. Run the Filament Through: Insert new filament into the extruder and ensure it's properly seated. 3. Start Printing: Begin a test print, such as a 20mm cube. 4. Simulate Filament Out: Snip the filament above the sensor box, but not under it. 5. Test the Sensor: The printer should detect the filament out condition and move the extruder head to the left, displaying "Change Filament." 6. Reactivate Print: Manually heat the extruder hotend to 200°C and heat the bed to 60°C (or your preferred settings). Then, pull out the old filament and insert new one. 7. Resume Printing: Click "Resume" in Octoprint to continue printing. This setup provides a safe and automated way to detect and respond to filament running out during long prints, saving time and reducing the risk of damage to the printer or finished products.