tig welding with bobcat 225

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Can anyone tell me what setting my bobcat 225 nt has to be on for tig welding aluminum? I have a dayton arc stabilizer hooked up to bobcat, scratch start. Thanks
Reply:AC. Im unfamiliar with the bobcats, they do produce AC correct?
Reply:you can't scratch start on aluminum without the use of a run in tab made of a different material. (which material i can't remember but i think it was copper.)Ryan_______________________OF COURSE I DON'T LOOK BUSY... I DID IT RIGHT THE FIRST TIME
Reply:yes using copper will work but will take practice to start arcidealarc 250/250 ac-dc tigidealarc 250/250 ac-dc tig #2 used for sticklincoln sp100hh125dual arbor grinder polisher30 yrs of hand tools52 pitch blocks 6p-26prake gauge -pitch gaugeG&D prop repair 918-207-6938Hulbert,okla 74441
Reply:Isn't the dayton unit a HF unit for arc starting and stabilization?
Reply:Thanks ac worked great and I was able to scratch start without a piece of copper.