[TheForge] spray arc mig welding

[Dave Brown]

At 17:41 11/19/03, you wrote:
>You can spray weld with 75/25, just not optimally.

Generally speaking you want to be at 80% argon, or better.  There are a lot 
of good articles out there on wire feed welding (aka GMAW) and 
short-circuit vs spray-arc (sometimes known as "across the arc").  Just use 
GOOGLE or other search engine and enter "GMAW spray arc" (without the 
quotes) and you will find a lot of information.  One good site is:
http://www.thefabricator.com/xp/Fabricator/Articles/Welding/Article254/Article254_p1.xml
and there are lots more.

But if you're not welding sheet metal (under 1/8"), then spray arc is the 
way to go, although it's not the way to go for overhead welding and can be 
tricky for vertical welding because it is hotter than short circuit welding 
and the puddle is more liquid and drips if you're not careful.

All wire welders are not well suited for spray-arc, or so I understand.  My 
welder (POW-CON, now ARCON) has a position switch to select short circuit 
vx spray arc.


Dave Brown
Heritage Smithing
Green Bay, WI
ABANA, UMBA, GoM, MODA, ARG