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Mig polarity and other stuff...long...sigh
QUESTION:There are a few sites that relate wire speed, size and voltage to current.
It has some decent explanations and a forum run by the
cranky but knowledgeable Ed Craig. You are correct that larger wire will
result in more amps given the same wire speed and voltage. The size of the
welder is really not relevant until you get to the maximum output, ie the
same wire size, voltage and speed will run the same amps on a 250 as a 350.
I would try the unit without the pulsed feature and get the spray settings
down first. With regular spray transfer you should have more argon in your
mix- 92/8 will get you into spray mode at lower wire size/speed. You need at
least 85% argon to achieve spray transfer at reasonable current levels. I
don't have a fancy pulse welder but I think the same would be true for
pulse.
ANSWER: There is no Pulse Off/on switch. This beasty was made in the mid to
late 1980s, when the technology was prett new.
There are two user adjustable controls on the power supply. Amps and
off/on
Which kinda sorta makes it better as one doesnt get confused trying to
figure out what all the knobs and doofunnies do.
Will 100% argon work better than the C25? Can I use CO2?
Gunner
"Pax Americana is a philosophy. Hardly an empire.
Making sure other people play nice and dont kill each other (and us)
off in job lots is hardly empire building, particularly when you give
them self determination under "play nice" rules.
Think of it as having your older brother knock the out of you
for torturing the cat." Gunner
My limited understanding is you need at least 8% CO2 for heat and
penetration. More CO2 moves you up the chart as far as the amps needed to
get into spray. The pulse stuff I haven't used. I have an old ESAB 250 CV
unit that came out of a New Holland Skid Steer factory. I just got a new
wire feeder, a Miller 22A which I'm setting up to replace the ancient feeder
it came with. Tomorrow morning I hook up the gas and I'm ready to go. Spray
is nice when it works right. Very clean and the arc pulls into corners,
etc..I want to try some low alloy metal cored wire next for a little more
versatility.
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