With simplicity in mind and only requires a basic micro switch this filament run out mount will keep you printing even when the spool has ended.
Easy to use by inserting a basic limit switch, connect a wire to each outside terminal on the switch then run the other ends to your controller cards end stop pins for your extruder. Simple and effective.
This is a Digital download product. STL files will be available for download after purchase. Be sure to create a username and password at checkout. Once payment has completed you may download the STL files from the My Account area of the site.