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Martin H. Eastburn Martin H. Eastburn is offline
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Default What is an edge finder and how does it work?

I'll take a stab at it.

It is a go-no go feeler gauge.

When set up the central core is on a tipsy edge of movement.

So now when it is held a slightest touch will set it off.

One eases up to the edge and it trips. Now where is the
spindle center.

The edge finder is held in center by the holder. Mill holders
are best, chuck ok and almost as good if tightened using all
three holes.

The trigger cylinder is say .125" in diameter. Taking half of this,
we determine where the center really is since we touched the edge.

It is like a balance beam on a knife edge. Pushed latterly and the
beam 'drops'.

http://en.wikipedia.org/wiki/Wiggler_(tool)

Martin

Bob La Londe wrote:
Seriously. What is an edge finder, and how does it work?