Hi guys im new to tig welding so newbe question coming I have bought a rtech 170 acdc welder no problems there and have had about 4 hour's welding with it ( over a week) my steel work is improving its just the Ali thats giving me a headache the problem is the weld apperance, trust me l know im a looong way of any good yet but the finish seems " gritty " im using gray tungstons and multistrikes clean Ali aprox 60 amps (2mm plate) 10 cu feet 1.6 gas lens with a number 7 cup any pointers would be appreciated cheers guys
Rog
Rog