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Can you adjust ac balance on your tig?
Hmmm, homer what you mean?I need to grind more before the welding?As I said before, my english sucksLooks like he needs a bit more cleaning action
You mean the welding is to wide?Or that the metal is not clean enough?Lol, I was thinking a little less. Atleast in some spots, it looks like the cleaning action extends out pretty far from the bead, especially on what looks to be non cast alum.
But I didn't go to school for welding, and his beads look better than mine easily haha, as do yours homer.
Well, when TIG welding, you are using an AC power source. The properties of the AC wave actually can clean the aluminum depending on how you have the AC balance set. (On my Miller, 3 is balanced.) But with the AC balance, you can adjust the amount of penetration vs amount of cleaning action needed. (More cleaning action for aluminum that is dirty, like cast aluminum tends to be)
There depending on the aluminum, you don't need as much cleaning action, which is indicated by the white border on the weld bead.
Doesn't mean anything is wrong, just think you probably don't need much cleaning on that aluminum.
SP% Dial
is the length of welding time versus cleaning time, set to max cleaning at 30% welding time and 70% cleaning,
You are getting it, essentially. But you can change the size of the white border around the bead by using AC balance. So if you have really dirty alum, your white border will be larger with more cleaning action. But on clean alum, you would have a smaller white border.
I looked up your machine,
You don't have an AC balance knob, so that may be the reason why. But you do have SP % which seems to control the balance of the AC Sine wave.
Check out this link,
http://www.goodsdirect.net/200adc.htm
So, if you have that knob set higher (like 70%) you will have a bigger white border, good for dirty aluminum. But for clean metal you can probably bring it down a little bit more and reduce the size of the white border on the bead.
Welds look great. Very consistent!
I'd love to have a MIG around.
I'll be measuring that engine mount this weekend I think.