The systems and methods of the present invention provide a circuit for controlling
the magnitude of the main and pilot arc current provided to an arc cutting or welding
machine. In one embodiment, the circuit allows the user to set the pilot arc current
such that it automatically tracks the main arc current setting. The pilot arc current
is set to a value that is proportional to the main arc current, such that the pilot
arc current value is tailored to the specific cutting operation to be performed
and/or the specific nozzle and electrode being used. In an alternative embodiment,
the circuit allows the user to select from different pilot arc current levels,
such as low, medium, and high current levels. This allows the user to override
the pilot arc control in instances where the plasma arc cutting or welding machine
is operated under conditions not optimal for the selected nozzle and electrode.