"The regulator varies the pressure through a specially drilled or
critical orifice usually mounted at the outlet of the regulator."
Flow rate of the gas depends on the pressure and the size of the hole
(orifice) the gas needs to flow through. So you haven't posted enough
info to make even a rough guess. So you need to know size of the
orifice and the orifice must be smaller than the gas hose inside the
MIG whip. There is an online calculator to figure out gas flow. Here's
The MIG polarity is opposite to the fluxcore polarity.
"10 LPM is a good starting point for most gases."
You can measure 10 liters per minute with a bottle and a bucket. Fill
the bottle with water, invert it with the mouth under water in the
bucket, insert the gas hose and observe the emptying time. Your
restrictor orifice could be a needle valve or a screw clamp on the
hose, perhaps with a cigarette filter inside. If you can hit 10 LPM at
10 PSI then your pressure gauge gives flow rate.
Take the water to the welder, don't risk the unsecured tank falling
over in the kitchen and becoming a rocket.
The final test is if you have sufficient gas flow to keep the weld
clean, which you can easily see while you adjust the regulator.
Yeah, that's what I would do too. I mean spending ten minutes putting
a couple hypothetical hole diameters and gas pressures into the boxes
on a web site that you already have a link to and letting the site do
the calcutations is pretty damn technical. You're better off letting
someone esle do the welding too. I would say it's pretty technical to
figure out which shade to use or which autodark hood to use.
Yer makin' it a lot harder than it has to be . Start out at say 3 psi ,
if your welds look clean cut it back a bit , if they're cruddy jack it
up a bit . Or are you just a garden variety jackass that wants to
discuss endlessly why no one will tell you exactly what to do ?
Due to lack of answers I just went out and did it, the regulator I used
turned out to be marked in MPa' s not PSI, I just set it on about .1 MPa
which dropped a bit when using,welder played up a bit and would not work
but seeing it is an inverter and therefore electronic I did what I do
with the computer and rebooted IE. off then on again, Voltage round
20volt current round 120A feed about 4.01 meters per minute and it just
worked (clean weld not much spatter) regulator got cold but did not freeze
Can experiment with CO2 feed
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