Nice score!
Here is big welder I use:
It might look familiar to you. It is after all, a Miller 330ab/p. I didn't steal mine though.:greenwithenvy:
In 2000 or 2001, I think my dad found this one on craigs list. It was $1,000 and came with pretty much what yours has, but the cooler isn't anything great. I changed the cooler setup a bit and made a cage for it next to the welder. I haven't skinned the frame yet. The 330 is rated at 460 amps max. I only have a 50 amp 240v circuit to the garage, so 250 amps is the max I can push it. If I run at 250 for a long time it will heat up the breaker. I bought 6/3 cord for mine as well. It would need 104 amps at 240v for full output.
The best item I have on it is a heavy duty flex head water cooled tig torch. I had a light duty flex torch and it eventually leaked. It had a slim neck like the hard torches. The new one has a neck that is an inch wide and over half an inch thick. It makes it much easier to hold the torch in a comfortable position.
My welder also needed new capacitors for the high frequency. They are about a hundred bucks each from Miller IIRC. I would try some from an electronic shop if they were needed again, and could be found. I had a guy do some electrical repair on the machine when I first got it. The post flow timer or circuit leading to it needs some work as it likes to keep cycling after the initial post flow.
I use thoriated tungsten for steel and pure for aluminum. I tried the blue tungsten for aluminum recently and it seems to do OK on the sine wave machine. I haven't used it enough to know for sure. Pure works well, but I don't think even 1/8" pure is rated for 250 amps AC. Aluminum sucks up the heat and I find that I have to run the pedal 50-100% with the machine set at 250 amps, for the average aluminum work I have done. You can set the limit of the amperage on the front of the machine and the foot pedal will let you work from 5 amps up to that set point. Mine has a start adjustment that I leave on 0. If you set it higher, then you start above 5 amps. For thinner aluminum, I will set the dial to 50% while on the 250A AC range. It gives you more control with the pedal.
I have the 330 owners manual in a PDF if you need it, just hit me up.
Have fun!