Filament Width Sensor Prototype Version 3
Made by extreme_sitting, uploaded
I used black ABS and painted the top with primer. The instructions and information is a bit scattered between docs, pictures, and a video, but it was surprisingly easy to set up and calibrate. I'm using Marlin 1.1.4. I can finally get good prints from inconsistent filament.
I printed 2 versions. One at .2 and the other at .4. The main difference seems to be the cap for the light tube. It fits really loose in general, but the higher resolution version fit the low resolution tube pretty well. I also didn't use ABS juice because I hate dealing with it; so I went with Krazy Glue.