I've been using the archaic method of stepping down the Z-axis/bit until it causes drag on a piece of paper. Its been faily accurate, but I feel I can do better. I've looked at the tool setters with the little light and that looks like it could be a tad more accurate than what I'm doing. But what about a contact plate? Could I potentially hook a contact plate to the leads going to my Limit switch in the Z-axis and to the bit and then step down until the "circuit" is closed? Then add the thickness of the plate to get my true zero?
Can I do this through a Z-axis homing script? Or would it damage the tip of the bit upon contact with the plate? Or are these things so accurate where once 1st contact is made the movement stops immediately... I know electricity travels fast and all, but I don't want to drive my fine tip bits into a copper plate and damage the cutting tip. I'm just looking for a quicker and more accurate way to zero the Z-axis.