Change Z in real-time based on IR sensor

[lek]

I have a Duet board on my 3d printer and love it, looked over at my laser and was curious if I could install a Duet board on it, and also have some kind of auto focus sensor on the head that can run the Z table up and down based on the material it is cutting.

Similar to this:
https://www.youtube.com/watch?v=TvP1nIesntg&feature=youtu.be

Would something like this work?
https://miscsolutions.wordpress.com/mini-height-sensor-board/

Thank you.

[dc42]

See https://duet3d.dozuki.com/Wiki/Gcode?revisionid=HEAD#Section_M594_Enter_Leave_Height_Following_mode.

The IR sensor doesn't have a true analog output, although it could do with modified firmware and a smoothing capacitor on the output.