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converting a 3 phase welder to single phase.

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86turbodsl

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And one item that was not covered, you need a LARGE RPC to run a typical welder. It's not worth it in my opinion, as an owner of a large RPC even. Either convert to single phase ala haas-kamp method, or get a single phase unit. You'll be money ahead if you don't already need an rpc.

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weldslikebutter

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I was looking at buying a China welder I have some projects to do, Hoping that some of you ole buggers are still here. Old topic in all
It's listed as 380 volt and some one say's you just need to wire it the same as its exactly like 220v single phase. I enjoyed reading since I not Mr. electrical, also Do glass vacuum tubes play a good part in getting a warm sounding arc, like some stated for a guitar amp produces a warm sound. I recall a welder I use to use big bigger thing. believed from the 70's era but had the sweetest welds from it.
I believe it also had a glass vacuum tube in it least it looked like one? just bigger.
 

dogdog

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A link to that say welder will be helpful... This thread is a transformer based 3 phase welder.

A lot have changed since. and the newer welders are inverter base that are capable of dual voltage (and/or) dual phase capable.
But some like the miller dynasty 200 I have are frequency sensative, as in 60Hz single phase or 3 phase any voltage up to 480V .. I needed a different power supply module if I bring to to other part of the world. So check with your seller.
 
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dogdog

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Both says single phase 240v

And both Miller and Hobart are older transformer base welder. You can probably still find the information from Miller or Hobart website the proper specs for these welders. These are not China welders.
 

dogdog

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As far as amp rating or wiring needs for your ac power you need to view the input specs not the output specifications there are few discussion about these things here. Go find the spec info on the welder then you can get a better idea. There are 3 phase model of those looking ones as well so you will need to check carefully. Either case those are heavy.
 

BukitCase

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I realize this old thread is more about older welders; but I'm still waiting for somebody to tell me where to find AUTOSET on my MM-252 - My first MIG was the transformer version of the MM211, autoset worked fine but kinda limited in options - I sold it to a friend when I found a CL deal on a mm252 with a NIB 30A spool gun and 3 tanks, dual running gear, even the 252 itself had only run about 4 pounds of wire.

I missed the smaller size for some stuff, so bought the inverter MM211, still have the MM252 (it's run about 150# of wire since I got it)

The ONLY machine I'm aware of from miller that sorta LOOKS like the MM252 but DOES have autoset, is the MM212 - same size case. However, last I looked (I was considering the 212 til I found my deal) the 212 uses the same "basic" autoset as the transformer MM211, where pretty much ALL of Miller's NEWER inverter types (INCLUDING the inverter 211) have the "enhanced" autoset - more wire sizes, more gas types, aluminum, etc -

Just tryin' to save the previous poster from bothering to look for autoset in his MM252... Steve
 

dogdog

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https://www.kijiji.ca/v-view-details.html?adId=1614932583
This pretty much just like the one I use to use. I would would need to pick it up tho
https://www.lenmark.com/products/di...rent-ac-dc-arc-welding-power-source-no-901784
Then I found this one, I made an offer on it, Would this need a 100 amp breaker as well?

Not sure what $1600 CDN to USD is, that is almost a 50 year old machine... definitely no MM252

Input power of 90A @ 230V... and #3 wire size... I don't think this is a right fit for home shop or small shops. heck you are better off with some inverter welders somewhere else. Even if Hobard / Miller is a good brand. Cost you more to operate in the long run, and no guarantee parts. but that is JMO. You can google the Hobard machine ones, probably the same. if not very similar.


 

weldslikebutter

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Well I was originally looking at one from China, but there listings are funny like, for instance they will list machines at 400 for a name yet it's only a 250 amp machine and than I noticed there power is at 380 volts, wondered if they some how scaled differently. I not overly electrical inclined, in searching I came came across this older thread. The machine is listed for $999 US Time I convert to Canadian and shipping duties yea I'm better off buying from here, plus they always supply cheaply missing items, or it's just poor quality items, like a 5 foot ground clamp, no foot pedal no water cooler options than it comes to what about the consumables for the torch they provide. It losses it attraction. When they demonstrate the machines in question on aluminum - either they are really bad at welding, or the machine is not capable as described.

The gambler said it best know when walk know when to run... Than I got to thinking of the old Hobart I use to run bigger, heavier, but long lasting and still welding being able to produce butter welds, when there maintained, so I started looking at older one's, cheaper in price and some times they come with all the gear necessary like a cart even, to start welding. when you get into welding aluminum it's nice to have water cooled, you don't want to cook your hand even slightly, you might pay for when you get older. Same for grinding to much.
I'm older and I don't need that either.
So as a hobbyist playing with Stainless steel, aluminum, brass, copper, bronze, trying to not to get into the steel so much, unless it's small pieces and toss everything into a tumbler and see you in a few hours. Sitting at a table is more my speed now a days.
TIG Brush is more ideal, electrolytic weld cleaner, simple fast vs grinding, sanding, polishing, using primers and painting.
I also don't need the excess of dirt involved as well.
Had an ole Lincoln antique, 1948 stick machine that had a hand crank on it than I put a starter on it, small hobbyist model, upgrading it as it broke down showing its age, was in the period of mechanic's illustrated, it just was not overly designed well, it required Loctite, the engine shock the **** of it lol, learning lesson that was. when it was running it ran great. Than I got old and sickness appeared.

Starting over again been out of the loop for a number of years, I don't mind solving problems in older pieces or making them last longer, the machine I get will be a hobby as well, upgrading it. Putting gauges on it, if it does not have any, I'm in no rush really, but looking for a welder that is smooth in it's operating ranges has some sweet spots settings. Has some decent range to it. I really can't do heavy anymore, requiring a crane, plus I'm working out of a single car garage, for most stuff it will be DIY jigs. but I need the welder first.
 

dogdog

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Alpha Tig is popular with some people here. Maybe 2022 have some newer ones that does AC/DC tig for you. Start a thread ask, some one will reply. Plenty of these type of post here on the other section General tools tools discussion... or the weldingweb forum have tons of welders that will give you an brand independent honest feed back.

Inverer based we;der At least it is smaller and lighter weight.. Hobby welder here only so can't say yeah/Nay for your needs. Just know what you are getting into, those are huge / heavy and consumes power.
 
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