Hello Chuck, I have been using mach3 for many years on my 9' x 23' plasma table and basically what you're trying to do requires that you use a plasma post processor with THC. That is where your THC is going to be initiated in the output G-Code and then ran in the plasma screen set that interact with your THC controller. The other part of the THC is a Plasma Cutter with torch active/ volts or adding this option through the installation of an Amp coil. You need to check with your plasma manufacturer for this option on your model or get one from the manufacturer of your THC controller that you will be using. Hope this helps.
