Problem balling tungsten when welding

[mad68rs]

oh and since you mentioned welding aluminum - which you do on AC... make sure you set your machine to DCEN - DC electrode negative... this means about 2/3 of the heat will be in the work and about 1/3 in the tungsten... having the machine set to AC will cause the tungsten to ball, and DCEP - dc electrode postive will put more heat into the tunsten then the work