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  1. #6
    Aahh...I see - I use nice flat acrylic as spoiler backing board with double sided tape, the acrylic gets thrown....



    (btw the green wire is my auto Z zero sensor wire to my CNC board..the right hand side clamping strip is conductive & makes contact with the FR4 copper surface. The tool is grounded...therefore when the tool touches to copper FR4 surface, the CNC-USB software knows it's exactly Z0)


    ....but only after I've used both sides! (I don't need totally flat because CNC-USB software probes the Z plane prior to V cutting)
    Last edited by HankMcSpank; 12-05-2013 at 12:46 PM.

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