Originally Posted by
.RC.
So fabrication in industry uses flux cored wire....
I would have thought it would be cheaper gas process.. Flux cored wire is many $$$..
I have an AS400 welder Graeme... 400 amps DC perkins engine driven... it is old and looks like scrap, but it works..
I also have a Miller Bluestar DX welder.... Supposed to be 180 amps output DC, again engine driven.. We did measure it putting out 220 amps though with a clamp meter..
The MIG is a transmig 250SE... Separate wire feeder unit.. With a 32 amp input 250 amps is 50% duty cycle... It has an overload light on it... I assume it works, I have never had it come on...
I am not sure how to get into spray mode.... I know if I turn the volts all the way up and turn the feed down all I get is a humming sound, no crackle... Turn the feed up and it starts crackling again... I usually run Coregas 5/2 5% CO2, 2% O2 remainder argon... Although I emptied my bottle and have not yet got a refill but in the meantime I got given a half full G size bottle of BOC universal gas to empty..
Years ago I used a LN25 on an old 225 amp linc weldenpower and flux cored wire to build a 30M X 18M shed out of universal beam... I did all the welding on it, it is still standing :D I have read though that CC power sources with wire feeders are only good for heavy sections in the horizontal position...
I have been up very close and personal with medium sized container ships.... It is interesting seeing the welding on the hull.... Many multiple runs, looks like it was done by dave the apprentice as they go all over the place, there is no way they are robotic welded.... These ships are made in China...