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  1. #1
    Join Date
    Mar 2018
    Posts
    22

    Plasma tourch arc issue

    Hi Guys,

    I'm running a mach3 plasma setup. I have the mach3 USB motion board. If my pierce and cut hight is higher than 1mm the tourch makes a small spark but does not fire. And then 95% of the time it disconnects all USB devices from my pc. The pc issue only happens when the tourch does not fire.

  2. #2
    Join Date
    Nov 2012
    Posts
    591

    Re: Plasma tourch arc issue

    You'll do better on some Mach-specific forum is my guess. This forum is for the Tormach mills, which used to come with Mach 3 a few years ago.

    Regarding the "PC peripherals stop," that sounds like EMI from an inductive kick-back, which seems likely caused by your arc equipment. You'll need to do all the things to insulate against EMI. Putting the PC on a phase of its own would be a good start, as would EMI protection filters on both PC and plasma circuits, and possibly ferrite rings around all cables going into the control box. (Beware that ferrite on USB may make degrade signal quality, so you may need to not put them on USB cables.)

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