Any one have a 3 in 1 tig/arc/plasma unit

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keytops
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Any one have a 3 in 1 tig/arc/plasma unit

Post by keytops » Mon Jan 17, 2011 9:46 pm

These 3 in 1 machines are all over ebay from $200 to $2000 any of them any good? Anyone have one? Deceny buy? Chinese garbage. I have a miller MIG that I like but it would be nice to play with aluminum too so I'm looking for a welder and I stumbled upon these things

http://tiny.cc/3in1tig
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Post by marko76 » Mon Jan 17, 2011 10:17 pm

You can definitely weld Aluminum with a mig. You just have to change out the gears and use Argon (...and yes you can use other gasses, I just prefer Argon...)
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Post by eazye2000 » Tue Jan 18, 2011 1:06 am

Straight Argon with a MIG, or get fancy and get a mix with some Helium...
But yeah, a MIG welding aluminum depends on if it has only DC capability, or if it has the bells and whistles of AC or push/pull or pulsing... Not sure what Miller you have, or if you can do any of this.

But my Lincoln MIG that only did DC, I used straight Argon, and could weld almost 1/8" at 140amps DC. Key is to get the metal pre-heated and practice about 10 minutes on something that is similar of what you want to do. It's almost like dripping wax into a crack if that makes sense.

But I have no experience with the Chinese 3-in-1 machines. I do, however, have a 50amp Plasma from eBay for like 400 bucks, and it does 1/2" cuts on steel like nobody's business.... I think it's a gamble on eBay with this foreign stuff.

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Post by KoukiKAT » Tue Jan 18, 2011 8:43 am

I've considered getting a multipurpose box. I like the Longevity ones, since they seem to have pretty good warranties and customer service. No experience with them though.
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Post by Jordan Gladman » Tue Jan 18, 2011 8:55 pm

You cant TIG aluminum unless you get a high frequency TIG, the cheap scratch start TIGs barely weld steel as it is. I bought a Miller 180 w/ spool gun, works great for welding aluminum. IMO this is one of the cheapest solutions for laying a decent weld on aluminum, anything short of a decent TIG or spool gun is going to be hell. Lincon offers a spool gun, find out if it fits your unit. Trying to use a regular feeder and nylon liner will get you about 1" of weld for every 10' of wire because you pretty much jam up the wire every time you start and stop, its not fun.
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Post by Jackasknissan » Sun Jan 30, 2011 12:06 am

any dc stick welder, and a spoolmate 30 w/ pulse pack, works fantastic, consideringi weld aluminum boats from time to time at work, and also for boat building all that gets used in the shop is a miller xmt 304 with a xr30 push. pull wire feeder.

fiy, tig is the only aluminum weldoing that is done in AC, both stick and wire feed, are done in dcen,

the positive electrodfe element is what cleans with tig, and the nagative gives the heast input into the weldment. the buzzing you hear has to do with the frequency the inits pule at, as well as the arcs trim ( aka luder buzz is les vlotge, wheich means a dirtier arc, and the wire pushes more penatrastion.

invest in either a tig or a good spool gun combo ( the spoolmate 30 is the best gun out there, it is a time proven design, .

the spoolmate 100 200 work, but are ****, the 3035 is mediokre at best,

very often for service calls, all that gets used is the portable dc CC stick welder, and a spoolmate 30.

cc/ cv, traditionally mig has always been done on constant voltage, so it keeps a constant self correcting arc loength. how ever with lincolnms. power350 they are using a pulsed current setup ( same idea as puleded tig only a much greater differetial in current). this has shown that you can use a tradition cv spool gun, on a cc machine, and the ghange in arc length, which does change the heat input( resistance) will change the voltage which according to ohms law means that when are lengh changes, aperage must inturn, which changes voltage and restabilizes the arc to its proper burn rate.


helium is a hotter arc, and gives a far less stable arc and gives much more spatter.

how ever with a helium/ oxy/ argon mix ( about 1-2% oxy) its enough to give more penetration and a slightly more stable arc


I probably went into more info that 99% of those out there.

sorry
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Post by Jackasknissan » Sun Jan 30, 2011 12:34 am

any dc stick welder, and a spoolmate 30 w/ pulse pack, works fantastic, consideringi weld aluminum boats from time to time at work, and also for boat building all that gets used in the shop is a miller xmt 304 with a xr30 push. pull wire feeder.

fiy, tig is the only aluminum weldoing that is done in AC, both stick and wire feed, are done in dcen,

the positive electrodfe element is what cleans with tig, and the nagative gives the heast input into the weldment. the buzzing you hear has to do with the frequency the inits pule at, as well as the arcs trim ( aka luder buzz is les vlotge, wheich means a dirtier arc, and the wire pushes more penatrastion.

invest in either a tig or a good spool gun combo ( the spoolmate 30 is the best gun out there, it is a time proven design, .

the spoolmate 100 200 work, but are ****, the 3035 is mediokre at best,

very often for service calls, all that gets used is the portable dc CC stick welder, and a spoolmate 30.

cc/ cv, traditionally mig has always been done on constant voltage, so it keeps a constant self correcting arc loength. how ever with lincolnms. power350 they are using a pulsed current setup ( same idea as puleded tig only a much greater differetial in current). this has shown that you can use a tradition cv spool gun, on a cc machine, and the ghange in arc length, which does change the heat input( resistance) will change the voltage which according to ohms law means that when are lengh changes, aperage must inturn, which changes voltage and restabilizes the arc to its proper burn rate.


helium is a hotter arc, and gives a far less stable arc and gives much more spatter.

how ever with a helium/ oxy/ argon mix ( about 1-2% oxy) its enough to give more penetration and a slightly more stable arc


I probably went into more info that 99% of those out there.

sorry
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Post by HoboNasty » Mon Jan 31, 2011 5:50 pm

I don't know anything about welding. So I got out of this that AC is for aluminum and DC is for Steel?

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Post by keytops » Fri Feb 04, 2011 9:40 pm

Yea. That is correct.

I definitly plan on getting a welder with the AC balance function so I can adjust penetration/ cleanliness. The plasma cutting feature is also a big plus, I know thats going to come in handy. I think I'll put some of my tax money toward one but I was hoping someone on here has tried them and knows if they are decent or a waste of time.
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Post by je_decoy » Thu Mar 03, 2011 2:49 pm

keytops wrote:Yea. That is correct.

I definitly plan on getting a welder with the AC balance function so I can adjust penetration/ cleanliness. The plasma cutting feature is also a big plus, I know thats going to come in handy. I think I'll put some of my tax money toward one but I was hoping someone on here has tried them and knows if they are decent or a waste of time.
If your looking at getting a multiple welding unit I have used miller dynasty and they are very good machines im not to sure of how much they go for lately but awesome rusults and clean welds no matter what process you choose ... well I hope this helps good luck

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