In my experience it depends what you are doing.pavetim wrote:Ok forgive the noob questions but that's what I am lol. For the trailer, like I said it's 3/16 mild steel. The miller calculator says 3/32 tungsten which I have, says 190-200 amps but that seems like ALOT. It says inverter tigs req's less heat but how much, I have an inverter tig. It calls for 1/8 filler too and again that seems awefully thick. I'll play around with some scraps first, just wanted your guys opinions before I start here is what I figure i'll start with.
17 series air cooled WP torch
3/32 2% Thoriated tungsten sharpened to point
1/8 ER70S-2 filler rod
170 amps running foot switch.
For example, I was tig welding 3/16" "t" joint today showing a student what to do.
I ran 160 amps because that's all that machine has. I would have run more like 180-190 on the other machine.
These adjustments just get done based on experience and personal taste. The student found 160 amps to be just right for his abilities because he could go slower.
I used 1/16" filler because that's all we have at the school right now - works fine but 3/32" filler would have been nice too.
With a gap I would have liked 150-160 amps - or less depending on the gap and bevel.
Why weld the trailer with tig when stick would be faster?
And of course the obvious question for me is, if you're a noob, why are you building a trailer?
