Aluminum Welding Wave Form.

"If some one of you do not mind to spend a little time to light me up on the question, I will surely apppreate."

Have a look at http://en.wikipedia.org/wiki/Gas_tungsten_arc_welding it took less than a minute to find! Tig welders are usually 3 phase so DC ripple isn't a great problem

Hello! Thank's for the link, i will read it completly a little later and probably more than ounce to make sure i understand more about welding process if i can call it like so.

I 'm still looking for a scope picture sort of thing, you know the saying a picture worth a 1000 words, that is all. i agree, disapointment is bad for you.

Thank's to bother...

To be honest reading about something isn't always a help. If you get on OK with the welders where you work ask if you can have a go. Surely there will be odd bits of scrap to practice on. It worked for me with MIG and stick, but I couldn't get the hang of gas welding.

Your thinking of Mig welders these can be 3 Phase with 3 phase rectifiers which reduces the ripple. All standard transformer tigs are 2 phase, With the exception of inverters which can be 2 or 3 phase this is converted to DC before switching to an AC or DC output. A big advantage of the inverters is that the output is at a high frequency AC or very smooth DC due to the low ripple these give much better arc characteristics than the low frequency transformer welders. As you say Wiki gives a lot of details regarding AC Aluminum welding , current balance and high frequency high voltage.The OP should read up then ask some questions if needed.

send your local supplier a mail, i am sure he will give you all you need.

Thank you, I probably made myself no clear enough. I tough from an electtrician point of view, that there was a lot people who tried to convert an ordinary cheap ac welder to a most sophisticated machine that is all, just curiousity and been at work offshore with all power electronic components at my disposition and too much time to think about craky ideas like that.

But you are right about the local supplier. I just could not resist to the 3 in 1 Plasma stick tig combo machine for sale on ebay. It will be on my door step when i arrive home waiting for me...

And it is still just for fun

I'm not entirely sure that I understand the question. However, if you are trying to understand what is happening while the welder is using AC current, the following article may be helpful. I "think" you are referring to the pulsed mode.

http://www.aws.org/wj/supplement/wj0707-196.pdf