Plasma CNC Proma THC install with Mach3
The Proma Compact THC at $250 is the bottom of the line torch height controller. It simply monitors the voltage being used to generate the plasma arc, compares that to a voltage you set on the unit and then triggers two input switches to Mach3 to tell it to move the torch up or down in order to maintain the selected voltage. But; it works!
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