I am having a problem piercing with the machine I am running. I would like to use the lower amperage tips to get a good quality cut on light gauge steel, but they wont pierce. It arcs and it seems that the arc wanders around under the nozzle . Ive tried using another ground clamp direct to an "in ground" bar, and have used a grinder to get through the work piece mill scale.
Doesn't make any difference.. What else can I try?
thanks
Bruce