C'mon Larry! The inverter is only part of the power supply which is only part of the "guts..." You still need all of the other associated components that control, condition, step down & rectify, etc. and, other components that allow for AC square wave output as well as a variety of other features that an XMT or a 350P simply doesn't offer... Besides, the only maker of small engine driven portable power sources that were capable of being carried into most confined spaces, or locations where to hook up to a larger engine drive would not be practical were the Italian "Buco" gas drive really small portable welders which I personally sold a pallet full of them to the NYC Transit Authority for their field elevated platform and track maintenance & repair crews but the last time I checked, nobody sells anything like those puppies anymore...
Then there's the fact that most hobbyists/small sized maintenance shops will not initially purchase an engine drive as their first welding power supply as the stats show because they don't need one for their situation even though that could also change in a very short period of time which would indeed make it a more prudent choice to make when deciding to purchase equipment for an expanding entity...
Oh and you mentioned Fronius which is probably true in certain respects but, have you ever run any OTC Daihen CO2 GMAW equipment? They're not too shabby as well but that's a different topic so I won't go into that one any further since I would rather point something about my experience that's relevant to this discussion that you may have overlooked... Then again, I don't bring this up that often anymore to remind anyone of my own diverse experience with welding equipment...
In fact everything that you point in greater detail compared to your previous post, I have been aware of for many moons and, may I remind you again that I was repairing this type of equipment as a factory authorized welding equipment repairman certified by the same Miller folks from Appleton, WI before you ever laid eyes to the "guts" of any of these power sources, or engine drives as well as all of the associated optional component& kits for the four major arc welding processes including all of their wire feeders, guns, torches, hoses, regulators, etc. that they and other manufacturers offer including portable wire feeders such as the Miller S32P & S model portable CC/CV units also...
I installed. repaired & upgraded hundreds of Miller power sources as well as their associated accessories & optional components & kits since 1984... And I remember when the inverters first came out before Miller or Lincoln or L-Tech had their first puppies out in the market while demonstrating them back in the early eighties when they first were being sold worldwide, and also performing factory authorized warranty repairs in the older Pow Con units like the 300, 400 and 500 SM's & ST's as well as the Plasma Plus power sources which were probably the first multi-process & plasma cutting power supply sold world wide... Hint-hint to Welddeveloper to securing access to their service manuals to give you some ideas for your design!
So I'm very aware of Inverter technology and it's subsequent improvements since as well as what the 3 major outfits have to offer since from being a factory authorized service person for both Lincoln and L-Tech which used to be Linde part of Union Carbide and, is now known as ESAB North America where from the same factory in Florence, NC that Linde/L-Tech used to produce their older green machines, pop out the ESAB yellow puppies... I say this because judging from your response to my previous post, it seems that you didn't acknowledge this in your last post of this thread, or you completely forgot about that sort of experience and knowledge I have acquired throughout my career in welding...
There's more than that when it comes to my own experience with all sorts of both low-end as well as high-end welding equipment... But I'll stop here because I don't want to bore anyone with too much of what I'm experienced in actually doing during my career.
So I just wanted to re-acquaint you and anyone else for that matter, on my welding & cutting equipment repair knowledge from my experience as a welding technical sales rep way back in the eighties... And even though a whole lot has changed since then, the electronic principles still remain the same, and I have always maintained a current understanding of whats new and exciting out there as well as refreshing and renewing my experience with older equipment also... This old"Sea Wolf" still knows his way around all sorts of welding equipment "guts" almost as well as I know my way around both Fast attack and "Boomer" Submarines my friend.
Btw, Have you ever run a Gilliland GMAW power sources Larry? I have run Fronius equipment over here in Pittsburgh and I have to admit that their equipment is awesome but, you haven't GMA welded until you run a Gilliland power source...
http://mtgilliland.com/Gilliland.htm#There's not much at all to learn from them in their website because their technology is proprietary in such a way that their main customers are some US Naval shipyards... For example, EB used this equipment to weld the hull sections together of the Submarines they built like the 688 Los Angeles Class Fast Attacks and the Trident Ohio Class Super-Boomers and they still used them @ the EB Quonset Point facility where they actually put together the steel and weld it up to make those hull sections for the Virginia class Submarines that both Newport News & EB spit out... These really do put the Fronius power sources to shame when it comes to the smoothness of the arc characteristics then again their main customers are any one of the major shipyards that build ships for the USN so you need to ask folks who have tried this equipment because mostly everybody else aren't aware of this equipment and they're also made in the USA! You should check them out first before you give that much credit to Fronius because they're not alone @ the top of the mountain... In fact, have you ever run Oerlikon? here's their MIG/MAG catalogue:
http://www.oerlikon-welding.com/http://www.oerlikon-welding.com/file/otherelement/pj/mig%20mag48919.pdfAsk Fronius/Stephan about them... He'll fill you in on them... That is, unless he just gets angry and changes the subject!
I'll say it again here: Everything that the Asians have going for them now was stolen by them from us in the first place Larry! All their advances in electronics come from what they stole from silicon valley & the Boston corridor with all these foreign students studying here since the Seventies for crying out loud!!! I'm tired of seeing the innovation that originally started here go to Asia because they can do it cheaper!!! I still think we can do it better here and I'm willing to pay more to support that sort of change from the status quo!
Where's Dave? I know his opinion on this topic would be at least worth noticing where ever the heck he's @
I'm done in this thread - "snort!!!"
Respectfully,
Henry