Just tried to fix a part off my dad's 37' motor home. It's a diesel pusher and the rear has a louvered hatch that is an aluminum frame with aluminum fins going across it. Each fin is about 30" long and they're just tacked on either end of the U shaped frame. Several of these have come loose and I cleaned it all up, set my HTP Invertig to 140amps max, used a Lanth electrode (1/16) cleaning/penetration in the middle, 150Mhz for freq and a point on the electrode. I struck the arc and instead of a nice, controllable arc I got this dancing wide looking firey thing. Tried stepping up the amps and feeding a little 4047 rod in and the parent material just kinda bubbled up and got all sooty. Parent material was around 1/16 thick flat stock.
I got mad so I grabbed a piece of 1/8 flat stock that I had practiced on and tried to run a bead down that...the electrode just kinda melted back up into the cup and left a little soot on the piece. I haven't used this machine in a few months so maybe I just lost what little touch I had??
I must have broken several rules here...anyone??
Thanks
J