Question about Pulsed Mig Process

[Oxide00]

Why is pulsed MIG not recognized by the AWS as a acceptable method of transfer?? Does anyone know? Thanks

[performance]

That would be a question for the AWS. I believe, because of the change in the arc, it actually goes between two forms of MIG welding, short circuit and spray transfer, and you are really welding with two separate processes and short circuit isn't considered good for HD construction...That's my guess. Though I don't have a copy of the actual 1.1 statement...Maybe someone here does.

[geezer]

Pulsed mig welding is not all it is cracked up to be , lack of penetration etc. Too get a better understanding of it's flaws go to this site http://www.weldreality.com/pulsed_we...ndamentals.htm

[Robert s]

Porosity in the weld was always our concern. So we always did the same thing when we were asked by the Miller rep if we wanted to try out a pulsed machine. JUST SAY NO.

[performance]

Our new 250P's will have the possibility of turning off the pulse...for those situations where it is prohibited.

[Oxide00]

Hey thanks for the prompt replies. It seems pretty clear to me now. Oh another thing, right after I posted about the imig205p I went to school that night and I came to find a brand new miller 350p welder that the school had purchased for the students to practice on for northrop grumman's weld test funny huh?

[geezer]

It will be interesting to see how that unit does vertical up fillets in pulse mode, something miller pulse units have never been able to successfully for the last 30 years according to this site: http://www.weldreality.com/equipment_evaluation.htm

[Wrenchtamer]

I have never tried it, but I have been told the same thing. That pulsing overhead is begging for a spark shower.

[performance]

Pulsing in theory should offer more control in out of position...But Spray is a flat only process.

[Robert s]

Our new 250P's will have the possibility of turning off the pulse...for those situations where it is prohibited.

Now if you could turn off the pulse on the machine that would be a different story all together. I would like the pulse machine for the ability to speed up my thin sheet work. In that case I would say yes

[Oxide00]

Im starting to wonder if my school bought the welder because of its higher amperage rating and not because of its pulse capabilities. Hmmmmm

[performance]

Oxide, its probably more of a political situation, with either the local welding supply salesman or the Miller rep being "buddies" with the instructor...Not saying anything is traded under the table or anything, but instructors have strong preferences for equipment based off their friendship with the local welding supply people's input...and what Miller wants to clear out or what Miller is giving an extra incentive on to "push".