In a nutshell..
I did a Level 2 welding course. Bought a nice Rtech AC/DC 200. Practising on some 3mm sheet, doing some simple joints..
http://www.r-techwelding.co.uk/welding_equipment/Tig_Welder/Tig_Welder_R-Tech_Tig201
So, DC it welds lovely.. No problems at all. Very clean and stable..
But welding on AC I can't get the arc to focus at all. All it seems to do is wash the surface of the aluminium sheet. If I crank the amps up to 80-90 if just builds a big puddle. I just can't get a small focused puddle. It's just scratching the surface or GONE.... I've tried all types of tungstuns, rods, flow rates etc.
100% argon, torch in the Neg, 32A Supply, Set to AC, pulse off, frequency in the middle (50%)
Any ideas ???
Cheers
I did a Level 2 welding course. Bought a nice Rtech AC/DC 200. Practising on some 3mm sheet, doing some simple joints..
http://www.r-techwelding.co.uk/welding_equipment/Tig_Welder/Tig_Welder_R-Tech_Tig201
So, DC it welds lovely.. No problems at all. Very clean and stable..
But welding on AC I can't get the arc to focus at all. All it seems to do is wash the surface of the aluminium sheet. If I crank the amps up to 80-90 if just builds a big puddle. I just can't get a small focused puddle. It's just scratching the surface or GONE.... I've tried all types of tungstuns, rods, flow rates etc.
100% argon, torch in the Neg, 32A Supply, Set to AC, pulse off, frequency in the middle (50%)
Any ideas ???
Cheers