From what I have read so far, this type of GMAW torch isn't meant to be used for such heavy wall thicknesses that would require more than 400 amperes... I mean it's rated @ 400Amps so of course it couldn't compete with SAW(Submerged Arc Welding) when many SAW applications require the use in excess of 400 amps...
On another note, the patent you listed is for a rotating nozzle type GMAW torch assembly which is not the same as being able to rotate the wire electrode @ relatively high rpm's... Therefore stirring the actual weld pool or puddle before the weld deposit solidifies as opposed to rotating the welding nozzle only... Resulting in limited control of the electrode placement in the weld pool relative to the electrode spin diameter...
Have you read the article I posted in my initial post regarding the R&D on Spin Arc technology by EWI to be used in the agile fillet welding of complicated ship structures yet? Here's the link:
http://www.nsrp.org/3-RA-Panel_Final_Reports/2003_Tandem_Spin_Arc_Final_Report.pdfBtw, thank you for your welcome back as well and then my thanks also go to the rest of my friends here... You all know who you are, Al, Allan, Brent, Kent. Milton, Stony, Tommyjoking and whoever else I forgot to list... This and other posts does encourage me to get well ASAP!
Respectfully,
Henry
P.S. Hey Glynn, you didn't surprise me with your reply in a previous post my friend so, thank you for your prayers and well wishes.