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Originally Posted by sanddrag
I read on this page that you can make a pretty decent TIG welder with an alternator and electric motor. My question is, can I make an Arc/Stick welder with an alternator and a gas engine? Does arc welding put a higher load on the electronics (alternator) because it is more of a direct short? Will it burn out the alternator, or will it be okay? The engine I have is an old 3HP Briggs horizontal shaft lawnmower engine. How much of an alternator (how many amps) could I run off of that? The above linked page recommends a 5HP electric motor for a 130amp alternator, but electric motors and gas engines have different torque characteristics.
If this will work, how much do you think an old alternator will cost and where should I get it (U pick parts maybe)?
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Uh isn't an alternator also known as an electric motor? I would take a look at Automative alternators and look at their output but i know their is a dirrect corelation between the power a motor outputs and the power it can make. Im pretty sure that if you ground it, other then the speed wearing down the part or being too stressfull, the motor shouldn't burn it out. Ehhh not as much experience here as i would like but im interested in knowing info about this too!