TIG Welding Machines: What is Scratch-Start, Lift-Arc, and HF Ignition?
What is Scratch-Start TIG Ignition? Scratch start is a very basic and rudimentary process, usually found on low-cost inverter welders that have been essentially designed for Stick (MMA) welding. The TIG tungsten electrode is scratched on the job to initiate the arc, and must be quickly lifted off the job…