When welding both stainless and aluminium at low currents (typically 20 - 40
30A) I frequently find that the arc changes from a fairly dim to a very bright light, apparently for no reason and at random. This makes it very difficult to see what's going on because my eyes can't react quickly enough to the light level before it changes.What causes this and how do I avoid it?
I'm using a Lincoln Invertec 205 with pure argon and 1.6mm rods (red ones for stainless, white ones for ali). (And no, I don't have the pulser switched on!)
Nick.