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TIG Welding with Engine Driven Welders


Tue, 31 Aug 2021 15:16:36 GMT
Let me start out by saying that I am not a professional welder.  I have been welding for 10- 12 years now and would like to think that my skill level level is slightly above hobby welding even though that is about all that I do.I have been looking to expand my skill set and learn to TIG weld.  Most all of my projects are mild steel but would like to get into light weight aluminum and stainless.In looking for a new unit, I have found that it might be beneficial to purchase an engine driven unit like the Miller Bobcat 250.  Due to the fact the stick quality should be much better than my old DC Stick.  It would also be very beneficial to have a 10,000 watt gen. around.   I do most welding out of my shop, and think I could tolerate the engine noise when the machine is needed.My question is how well do the engine driven welders perform for AC/DC TIG? In addition,I do plan on plugging my Hobart 140 into the generator and run flux core when mobile wire welding is needed.  How smooth is the power leaving the unit?  I know it has enough power, just not sure how steady it would be.Thanks for the input..TW
Reply:Tig weld steel, dcne, scratch start.  To weld aluminum using argon on ac you would need high frequency.  You could weld thin aluminum on dcpe, scratch start but high amperage will melt the tungsten.  You can weld aluminum with dcne, scratch start with helium.MILLER 330 AB/PMILLER GOLD STAR 130KUBOTA BX24CASE MINI HAY PRESSBENCH MILLHYPERTHERM 45BABY HOSSFELD
Reply:Grid power is always better in my experience that generator power. It is more stable for some reason especially when using a small MIG is concerned. That said generators work well and can be used as a power source for all welding processes as long as you have the appropriate equipment to connect to them. DCSP can be used to TIG stainless, steel, brass, or bronze right off the generator. Aluminum will need the high frequency stabilizer as Riley noted. If your generator doesn't have settings for the type of welding you are doing you may well need to buy a converter box for your application. Good luck.
Reply:I have a 12k watt that i use for my Lincoln square wave 175.  It drive this just fine but I need every bit of the gen for welding 3/16 aluminum.  Getting up into the 150 amp range really pulls the gen.  I know the lincoln can pull 45 amps out of the wall so it works the gen pretty hard.I have a new Syncorwave 250dx at the shop but I'm pretty sure that the gen could not pull it at 150 amps as the shop 50 breaker is ony good for a few minutes at 150 amps.  We are currently getting ready to go to 3 phase with it on it's own circuit.An inverter welder would work very nicely however.
Reply:if you're going to want to tig weld aluminum you would be better off stepping up to the next level and getting a trailblazer and a high freqency box.   once you have that setup you'll probably want to get a cooler;   once you have the cooler you can run up to 225 amps ac;then you'll find that maybe you are a little close to the generator even with a 25 ft torch;   so you'll want to set up an extension cord arrangement which will include two extension cords for 110,  ground and hot cables, 14 pin power cable and your argon line, another 25 ft or so. you end up with something like you see in the picture,  it will give you less than fifty feet of travel from the generator.   it could be longer though.  are you ready for that?i also have an inverter that will provide me with 250 amps of ac and i could/do run that off the trailblazer but i need the generator sometimes because access to power even if present can be problematic and the gen provides me with multiple functions.that said if you buy the bobcat you probably won't be happy with the aluminum setup.you can set up a spool gun but that's going to run you a grand and you have to be the wc115 interface for it.   they are harder to locate than the freq/box. and you'll probably have to pay more for one.and if all you are going to do is weld light gauge aluminum then you can forego the cooler.i think i picked the HF for about 375 on ebay and it came with a torch/26V and ground, 30 feet of 1/0.   i am near the ocean and it amazes me how many people from inland want to weld aluminum;  is there that much going on to justify the added expense?i keep an 8000//12000 generac generator in the shop and can run my inverter with it but rarely do.   south florida is the land of hurrican scares and you can buy generators down here after every hurricane season (which in most cases is a season without hurricanes) for dirt cheap.  i bought this electric start for 650 dollars with one minute of run time.   i keep it around cause you just never know;   maybe once the weatherman will get it right.good luck.almost forgot;  fingertip control or footpedal.  one aircooled torch and one water cooled. Attached ImagesLast edited by fdcmiami; 03-09-2012 at 07:57 AM.
Reply:Bentwings,You may want to do a little homework regarding installing 3 Phase power to run a Syncrowave 250.The Syncrowave 250 is a Single Phase machine (only).  You just need to upgrade the service to provide the machine with 100A/Single Phase power.Everyone has an opinion, but to me a Bobcat (or even a Trailblazer) is a poor substitute for a dedicated/purpose built tig welder, especially if doing aluminum/SS is your goal.  That's why you'll find that many of the mobile guys are running a Dynasty 200 off their engine drives.With the price of fuel being what it is now, an engine drive for shop use doesn't make much sense.Syncro 250 DX Dynasty 200 DXMM 251 w/30A SG XMT 304 w/714 Feeder & Optima PulserHH187Dialarc 250 AC/DCHypertherm PM 1250Smith, Harris, Victor O/ASmith and Thermco Gas MixersAccess to a full fab shop with CNC Plasma, Water Jet, etc.
Reply:Sorry my bad....spoke before I knew the facts.You are absolutely correct on the 3 ph.  I just finished going thru the Miller "book".  100A it will have to be.  Hopefully the electrician will be round next week while we are not busy.  I had asked about this originally as we have a 3ph air compressor.  Well I'll leave it to the electrician to fix it.Too bad when the "kid" my Lincoln 175 SQ Wave has to show the "big guy" how to do the job.  haha

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