Filament Width Sensor Prototype Version 3
Made by gammy, uploaded
All in all, a success, although I do have a problem with the sensor underestimating values, as compared to my caliper. I'd appreciate it if anyone has any comments/recommendations regarding this.
I did not build the PCB myself; I ordered it, and it arrived quickly.
Also worth noting is that my printer uses an early-revision Mini-RAMBO board, which lacks GPIO pin headers, and has a smaller pitch than newer boards. I decided on directly soldering the analog pin in place with kynar wire. Power could however be directly used from adjacent pins without soldering.
I also needed to manually compile the Lulzbot Mini customized version of the MARLIN firmware, the code to which is available here:
Note that the Lulzbot Mini branch is called
FoxGlove, and what you need to do is to simply remove the comment enabling