Hmmmmm. Lets see if we can get you up and running. OK, what size filler wire are you using? I myself, prefer to set the gap slightly less than the filler wire diameter. Are you holding your tungsten at as much of a 90 degree angle as you possibly can? I have found that the more perpindicular you run your tungsten, the more you drive your filler wire into the joint giving you that desired wedding band effect. I have seen welders use different methods of adding their filler metal. Some like to open up a key hole, and then push the wire in and let the keyhole fill up. Myself, I prefer when I can, (which is almost 99.9% of the time, to bend the wire to reflect the inner diameter of the pipe or tube, and just lay it in the root opening, and run the tungsten right on the wire, with a slight up down motion just a little less than the width of the wire, moving as fast as I can, still making sure to fuse both the top and bottom edges of the root. What type of root bevel preparation are you dealing with? We always make sure that we are welding with what we call a knife edge, no land what so ever. What size tungsten are you using? Most times, I try to use the same size tungsten as the filler wire. Do you have a nice sharp needle point with the grinding lines, (unless using already processed, polished tungsten) running in a spiral down to the point, and then flatten just the very tip so that when you look at the point, you see just a very small flat spot on the tungsten. Make sure your tungsten is clean. Any contamination will cause your arc to wander off to the side of your tungsten, rather than coming right off the point, and thus you are loosing control of you arc Try to think of the arc coming off the tip of your tungsten as a driving force. (driving the filler metal into the root. What is your heat setting? Might be you are not hot enough. It could also be that you are traveling too fast. I guess we need some more information so that we can help you. My email is in my profile if you wish to contact me. If you wish, I will give you my phone # and we could discuss this. I guess I have alot of questions for you, but there are so many variables that can affect your penetration.
My 1.5 cents worth.
Mike