That's great. You won't have to have as much EP balance if you clean the weld area prior to welding. Too much EP balance may cause the aluminum to spit back onto the tungsten given enough amperage. For practice it's not necessary to clean the weld area but for production it's the only way to get co...

Things are coming together quite well, tungsten staying clean and welding is ok too, more practice and I’ll be there, thanks to you all who took the time to reply and help me out. A couple of pics

You need to set your AC balance to 65-75% EN, or equivalently 25-35% EP. It all depends how your particular machine is configured. At the moment it just sounds like you're trying settings out without really knowing what they are, based on your post. RTFM. :) And yes, it has a lot to do with tungste...

You said you were "AC welding alloy", but you never actually said what you were trying to weld. What base metals are you trying to weld? Maybe I should have said aluminium, I am getting my head around welding aluminuim, i have done a lot of Tig welding steel, moly tube, and stainless, but...

You need to set your AC balance to 65-75% EN, or equivalently 25-35% EP. It all depends how your particular machine is configured. At the moment it just sounds like you're trying settings out without really knowing what they are, based on your post. RTFM. :) And yes, it has a lot to do with tungste...

Oscar, increasing the post flow of gas has solved my problem of tungsten discolouring so I’m happy there. With the AC balance, 10-80, 80 being hotter on the tongsten, I will try what yes suggested, only thing I’m trying to work out now is why it crackles while welding on AC, almost sounds like a Mig...

Thanks tweake, ok my post flow was very minimal, lol trying to save gas , I’ll up it see how i go, thanks mate

Hi group, just wondering why my tungsten keeps discolouring when AC welding alloy, I have a UniMig Tig 200 AC/DC machine, new, just bought it, using Zirconium tungsten (white tip) just can’t keep tungsten clean on AC, it does ball up but only very small, I’ve clean the job real good and wipe over wi...

Can pure argon be used with mig welding without causing problems? I have tried it, seems to work, weld seems a little dirtier and no crackle sound and very few sparks while welding. Cheers