Has anyone else tried the SHARP GP2Y0AH01F sensor for auto bed leveling and Z height adjustment? I have a proof of concept put together and it seems to be working well so far. I can get 0.1mm repeat-ability. It has an analog output that I run through a comparator to produce the digital signal for the Smoothie board.
I didn’t want an inductive sensor because of the size and weight and I really like printing on glass. The other IR sensors are not at all accurate. This one does require a piece of paper to be placed on the bed to take measurements, but everyone has that.
http://www.sharp-world.com/products/device/lineup/data/pdf/datasheet/gp2y0ah01k_e.pdf