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Thread: Adding A Tool Touch Off to my Centroid Acorn CNC System

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    rgsparber's Avatar
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    Nov 2012
    Phoenix, AZ
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    Adding A Tool Touch Off to my Centroid Acorn CNC System

    This article describes how I connected a Tool Touch Off to my Centroid Acorn CNC System.

    If none of this statement makes sense to you, let me explain a little. A Tool Touch Off is a fancy electrical switch. In its "normal" state, the switch is closed. When a disk on the top of the device is depressed a tiny amount, the switch opens. This switch is connected to my Centroid Acorn brand Computer Numerical Control system.

    As configured, I install my various cutters one at a time in the mill and push a few buttons. The system lowers each cutter down on my Tool Touch Off and can sense touch down. This lets it measure the length of each cutter. It can then compensates for the variation in cutter length as machining automatically proceeds.

    If you are interested, please see

    Your comments are welcome. All of us are smarter than any one of us.



  2. The Following User Says Thank You to rgsparber For This Useful Post:

    Seedtick (09-01-2017)

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    Oct 2015
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    Thanks for this Rick. I'm about to start investigating and building a CNC so will look at this with interest.


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    Aug 2013
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    Thanks Rick! We've added your CNC Tool Touch Off to our CNC category, as well as to your builder page: Rick's Homemade Tools. Your receipt:

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