finding center of a hole

[BeerFizz]

Hi,

I have an edge finder with a conical end, which I guess may be used for finding the center of a hole.

In the Mach 3 offsets window, there is an area for using an edge finder to set the offsets.

I have played around with this and haven't got it to work just right.

I would like to be able to use this to find the exact center of a hole and then set this as X0, Y0.

Could someone please give me a step by step on how to do this.

Thanks.

[Eurisko]

It's much easier to find the center of a hole using a dial test indicator.

A spring action contact point easily adjusts to any angle. A needle on the graduated dial indicates how far the contact point moves.

Mount the indicator in the spindle, locate the contact point against the hole wall, and position the X&Y axes until the needle shows no movement (while rotating the spindle by hand).

You are now perfectly centered in the bore.