Originally Posted by
TTalma
The one I linked to is the one I use. The seller only had one, it was a lucky purchase. When I was researching doing this, I saw other using a hall effect sensor, but the issue with them is that the amount of metal at the end of the cutter could affect depth.
If you do a little googling you can find mechanical limit switches that are position repeatable. I believe most of them are just hall effect sensors in a nice package, where the mechanical switch trips the hall effect.
The biggest problem I have with mine is that once in a while a chip will land on it and goof up the depth, I plan to add blow off, but need more time!