1. a - With 90/10 and .045, you should get into spray transfer at 26V. 22 - 23V would be short circuiting, 24 - 25V would be globular, or there abouts.
c - neither short circuiting or globular would be pre-qualified.
2. d - 3g is not possible or practical with globular.
e - slim to none
f - see 1.-a
IMHO... Globular is useless unless your machine is stuck on those settings, un-adjustable, and your only trying to temporarily trying to stick together two pieces of sheet metal...
Tim
Just use FCAW... sheesh.
(1) I think you will find that 190 amps is the lowest spray transfer amperage that is manufacturer recommended for .045 solid wire.
a. Yes
b. Yes
c. no
(2)
(d) it can be done... But it's stupidly impractical.. Even if you could get a pqr and qualify welders off of it.. Production would be inconsistant.
(e) triggering is a stupid technique for structural applications.. Bad chances.. Trigger sheet metal only.. Not D.1 code work. Can it be done? Yes. chances of succsess? very slim.
(f) I would like to see chapter and verse quoting that globular is not prequalified (it shouldn't be in my opinion, but nobody asked me)... However your WPS ranges go into short circuit range.. So NIX on WPS as prequalified as it currently stands.
For whatever it is worth, Lawrence has it pretty well indexed.
Whenever we release a contract package, we specifically disallow globular transfer for solid wire mig. We have had a few guys try to sneak in a globular pre-qualified WPS for out of position structural work and we dont play like that. I say sneak in, technically it is allowed by the code, but we still won't let them do it.
Thanks Lawrence. I am glad to see someone with the same interpretations and opinions.