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Unread 08-17-2019, 02:48 PM   #1 (permalink)
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Dual Voltage Welders

I have a 220v machine but it's just a cheapie Mig Pak 15 from Canadian Tire. I will be starting a project soon that will require body work and a 115v will be a bit friendlier for blowing holes in sheet metal.

I know about the Hobart MVP and I feel like this would be my first choice. I know Firepower has a dual voltage unit but I am not impressed. Any other obvious choices I should be reviewing? Miller has terrible reviews but I thought Hobart was Miller?
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Unread 08-17-2019, 03:04 PM   #2 (permalink)
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You know that a 120v machine can't be turned down less than a 240v machine right?

Just get some 0.023 wire and tips

But Fwiw, I love my Miller 211. Got for about $1100 otd after the sale and rebates. Nothing wrong with Hobart either.
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Unread 08-17-2019, 03:06 PM   #3 (permalink)
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I've got a miller 211. It's a good machine, anything more than 1/8" on a 15 amp breaker and you'll pop the breaker. Running on 220 it's great for thicker stuff. Miller guns suck. I just replaced mine with a tweco knock off and it's much better. I can never get a miller liner to last and always run into bound up wire.
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Unread 08-17-2019, 06:25 PM   #4 (permalink)
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Quote:
Originally Posted by YotaAtieToo View Post
You know that a 120v machine can't be turned down less than a 240v machine right?

Just get some 0.023 wire and tips

But Fwiw, I love my Miller 211. Got for about $1100 otd after the sale and rebates. Nothing wrong with Hobart either.
I did not know that, I guess I just assumed, ha we all know a 115v isn't good for 1/4"

the other reason I was thinking about dual voltage is because I presently do not have 240v at the new house
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Last edited by [Memphis]; 08-17-2019 at 06:26 PM.
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Unread 08-18-2019, 08:10 PM   #5 (permalink)
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I did not know that, I guess I just assumed, ha we all know a 115v isn't good for 1/4"

the other reason I was thinking about dual voltage is because I presently do not have 240v at the new house
Get a good quality 240V MIG and run it on a LiteFuze LT5000 voltage converter. That way you can run it off a regular 120V/20A outlet/breaker, and you can run any 240V 1-Φ welder up to the power limit of the outlet, which will be about 2400W. The advantage is that a good MIG welder usually has more adjustability and controls to fine-tune the arc to your liking.

This is my HTP Pro Pulse 220 running off a 120V/20A breaker that is being up-converted to 240V with the LiteFuze transformer. Like I said, the power output (and thus welding power) is limited to 2400W (which is roughly 110A of welding amperage at typical MIG voltages) because that is all the breaker will allow, but the main idea is that the machine doesn't know that the "real" power source is a standard 120V outlet, so it powers up and works, so long as you don't trip the breaker.
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Unread 08-18-2019, 08:50 PM   #6 (permalink)
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Originally Posted by [Memphis] View Post
the other reason I was thinking about dual voltage is because I presently do not have 240v at the new house
make a pigtail from your welder outlet to two 115v plugs
ground prong to grounds, each hot to one of the plugs' hots, neutrals floating (unless your welder has a 4 wire plug which I'd doubt)
plug the 115v plugs into two outlets on different breakers (out of phase) and hey presto it's 220v, same as a 220v outlet is wired
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Unread 08-19-2019, 03:18 PM   #7 (permalink)
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make a pigtail from your welder outlet to two 115v plugs
ground prong to grounds, each hot to one of the plugs' hots, neutrals floating (unless your welder has a 4 wire plug which I'd doubt)
plug the 115v plugs into two outlets on different breakers (out of phase) and hey presto it's 220v, same as a 220v outlet is wired
That will also work and will provide 4,800W of power if the outlets have a solid 120V on them. 4,800W of power translates into a good ~170-180A of welding current for an inverter based welder (depending on the voltage output at the welder), and a whole lot less if it is a transformer welder. Just watch out for the flames for suggesting non code-compliant electrical advice! I got flamed for it!

Last edited by OscarJr; 08-19-2019 at 03:26 PM.
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Unread 08-19-2019, 06:00 PM   #8 (permalink)
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Just watch out for the flames for suggesting non code-compliant electrical advice! I got flamed for it!
fuck that, a lot of floor sanders are wired like that
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