help flux core overhead

by Travis
(canada)

Hey i was just wanted to get a few tips here. I have to do a fcaw test in the overhead postion for cwb. Was wondering about the heats. Its a .045 wire and will most likely be 75-25 mix. Also was a little worried about burning the edge away and puddle falling out when welding the beveled side of the plate. The gun position should be just slightly forward and have about 1/4 inch stick out right?

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stickout will probably be more like 1/2" for flux core.

I have found this resource very useful to find a starting place for flux core settings.

http://www.millerwelds.com/resources/calculators/mig_flux_amperage_calculator.php


all manufacturers setttings are a little different but since you dont know what kind of wire you will be using, you probably can look up the settings.

copy some settings down on a cheat sheet and put it in your pocket just in case.

the miller settings always seem a little high on wire speed.

also the settings on the miller weld calculator are intended for 2f fillets so you might choose a lower thickness than you will be welding ...but its a good starting point.

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Apr 10, 2014
rained on by massive spatter NEW
by: Anonymous

see this question was like three years ago, but i bet it was a grounding issue...

Oct 27, 2011
Overhead Spatter
by: ttocS

Hello,

I'm a bit new to fluxcore but must say I love it... and I've been a welder since 1994 so I took right to it.

I'm also looking to take a 3/8" metal weld test (30 degree bevels) in overhead flux core with .045 wire.

I was running 75/25 gas, and was using 2 machines to weld with. One was a "roller machine" that the gun and spool was connected to and the other was just a welding machine that connected to and powered the "roller machine."

I had the welding machine heat set to 130 and the wire speed set to 230. That setting ran like a dream in vert & horiz. The slag was falling off with a flick of my finger.

When I went to do over head I was rained on by massive spatter... like more metal on the floor than on the practice plate.

Eventually I got it to "purr" again… but not exactly sure how… perhaps gun angle? I began to make very nice overhead welds. I switched out my practice metal for a test coupon and though it seemed like I changed nothing, the rain came back. Like everything was fine on my practice plate but as soon as I switched out for a test coupon, I couldn't get the metal to stick to my test plate.

Can anyone help with why that is? Is there a difference being "in the groove" for this symptom, than just running on the surface of a practice plate?

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