
Originally Posted by
performance
brit,
The Tig/Stick process is CC or constant current. The current stays the same at a given setting, but the arc voltage varies as the length of the arc changes.
The Mig process is CV or constant Voltage. The voltage remains constant and amperage is controlled or managed through the wire speed. Technically the amps go up the faster the wire is fed because the stickout generally increases.
I am not sure what you mean by a "coiled" mig gun. Are you referring to a spool gun? The spool gun is also CV.
Now with that said, you can buy voltage sensing wire feeders that automatically regulate the wire speed if the unit is to be run off of CC power supplies. It isn't a great solution, but it does generally offer satisfactory results when CV isn't available. These type units are used on engine driven welders and typically have a switch that will go from CV to Voltage Sensing depending upon the type of power supply. But they are more than the price of a new mig usually, even used they are quite expensive. If you have one though, it should work fine. Just watch duty cycle issues. I'd suggest our Power I MIG 160 with a spool gun. It does have a stick function and can get by with scratch start tig if needed. Its compact and portable and the price is right!!