I have been tiging mild seel and have had some really good results and have tried switching it to AC and have laid down some really nice looking beads on aluminium.
To be honest these beads looked great and really surprised me when I did them.
I am using my mates tig set and bits of scrap. He hasn't done any alloy stuff before either.
But my problem is it doesn't seen that directional and as precise as the dc on mild steel.
The puddle does appear where it would on dc and is off to the side a little. My mate says that I should not have the tungsten sticking out but level inside the shroud and we have ground the tungsten to a point, then we have ground the point off so it is flat about half the width of the tungsten and having the sloped sides.
I am just having problems tacking the aluminium together so I can weld it and focusing the puddle where I think it should go. Tacking is a real problem as I seem to just burn up the aluminium or make a ball of filler rod on top of the metal.
I have tried to alter the amps and can see the hot and cold when I am making simple runs.
So what am I doing wrong? Do I need to clean the metal more? Have I set things up wrong?
Have I got the tungsten too far inside the shround? Should it be sticking out 4mm like on DC?
Do I just need more practice?
Thanks for your advice.
Oh and would stainless steel be easier to weld? Would it be just a little more difficult than mild steel?
To be honest these beads looked great and really surprised me when I did them.
I am using my mates tig set and bits of scrap. He hasn't done any alloy stuff before either.
But my problem is it doesn't seen that directional and as precise as the dc on mild steel.
The puddle does appear where it would on dc and is off to the side a little. My mate says that I should not have the tungsten sticking out but level inside the shroud and we have ground the tungsten to a point, then we have ground the point off so it is flat about half the width of the tungsten and having the sloped sides.
I am just having problems tacking the aluminium together so I can weld it and focusing the puddle where I think it should go. Tacking is a real problem as I seem to just burn up the aluminium or make a ball of filler rod on top of the metal.
I have tried to alter the amps and can see the hot and cold when I am making simple runs.
So what am I doing wrong? Do I need to clean the metal more? Have I set things up wrong?
Have I got the tungsten too far inside the shround? Should it be sticking out 4mm like on DC?
Do I just need more practice?
Thanks for your advice.
Oh and would stainless steel be easier to weld? Would it be just a little more difficult than mild steel?