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  1. #1
    Join Date
    Nov 2003

    finding center of a hole


    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.


  2. #2
    Join Date
    Jan 2007
    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.

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