I have the THC300 and I am running Mach 2.I get the tip voltage read-out when I manualy fire the torch.The ark O.K. led comes on and the computer ark ok comes on.But when I try to fire the torch with an M3 command it does not fire ,if I click fire torch in Mach2 nothing happens.
My question is Do you think I do not have it configured correctly ,because I don't know where the pins are for torch on and torch off.