welder/welding machine question

I own a welding shop (29years)and I am still using my miller 250 on 220vac
I have the miller spool gun. You need to run the wire feed really fast compared to steel. It’s about wire speed with aluminum not so much heat. Unless you’re trying to weld like 1/2” or thicker.
As for Chinese units- amature hour.
Miller is also kinda weak as if you drop it the wrong way which happens- the spool holder is not the most robust. It is plastic.

All my other spool guns are made by a company called Profax. One was run over by a 25ton excavator and with bolt on parts lived another 5years.

As for the Hobart - sorry I screamed thru the post - really long for my old and tired eyes. You can make almost any spool gun work with any welder if you know the Wiring diagram and operating voltages and pin layout. Miller uses a 14pin airplane style plug.
I dont know the Hobart plug but you can get adapter harnesses and be done with it. I run miller because I need to count on my stuff. Hobart is nice but not the same caliper for a professional weld shop in my humble opinion.

There are a few connections-
Power off the transformer, your imbical cord. And your gas which does not typically get controlled by the welder (mig) but is controlled by the trigger on the gun. Also you need either a Argon or a helium argon mix for gas coverage for aluminum- if you don’t know that already.

PM me directly if you need assistance- I will help where i can.
Syleng1