Filament Runout and Binding Sensor

Detects filament runout and binding. Mounts directly to 2020 extrusions using M5 bolts and t-nuts. Can mount to either vertical or horizontal extrusions. Filament spool must be mounted below and to the right of the sensor (when facing the sensor). Bowden tube mounts to the top of the sensor.

In addition to the three printed parts you will also need:
2x M5 screws - 10 mm
2x M5 t-nuts
2x M3 screws - 18 - 20 mm long, longer will not hurt anything
4x M3 screws - 10 - 12 mm long, longer will not hurt anything
2x M3 nuts and washers (or bed adjustment nuts)
2x limit switches - http://a.co/d/1JXC5kr from Amazon
4x magnets - 10mm x 3mm - http://a.co/d/10lAWrz from Amazon
1x bowden tube and fitting - http://a.co/d/ax3PiVd from Amazon
1x epoxy to glue magnets
1x wire and connections

Recommended:
3mm tap
6mm tap
soldering iron/flux/solder

Assembly


Print all three parts.


Using a M3 tap, tap all 4 mounting holes in the limit switches - you may be able to cut threads