Question about the joint. On some occasions when trying to do a but joint with aluminum I can not get the puddle started using the TIG process. For what ever reason the material just falls away and I cannot get a nice clean puddle started. I can really notice it when using diamond plate material. I ran into this problem again the other day with simple alumimum angle iron. The material is clean.

This is a great site I purchased a Miller Syncowave 180 SD 3 years ago and might have 3 hrs on it. I enjoy metalworking and am now starting to use the welder a bit more.