On 06/11/2020 13:33, JohnP wrote:
wrote in :

What type of edge finder do you use (wiggler, split-cylinder or
electronic) and can you recommend it?


As an ex-Jig Borer I would use a Mercer dial indicator in a jointed arm in
the spindle and rotate it to touch each side of a slip gauge - adjusting
until I got equal readings and then pitch over by hald the slip gauge size.
Alternatively I had a block with a should that I could hold onto the edge
that had a slot centred over the shoulder. Rotate the dial indicator to get
equal readings.

I'm probably about to expose my lack of knowledge, but how does that
help find the edge of an object that you want to machine?