Machine Welder Automotive
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What type of Miller welder?
I had a welding class a while back and there was this miller wire feed welder, fairly large probably around 100-300 amp range, with a built in feeder. It used flux cored wire. It made beautiful welds. After welding you CHIPPED the slag off in big pieces SIMILAR TO STICK WELDING, very easy clean up, IT WASN'T LIKE MOST OTHER SMALLER WIRE FEED WELDERS THAT PRODUCE SLAG YOU HAVE WIRE BRUSH OFF, and you still don't get it all off (E.G. a small lincoln welder with .035 innershield wire.) My questions are, what machine could this be? Also, is it the machine, or the specific type of consumable that produces a weld like this with such easy slag removal and visual appeal? I know this is wordy
but hopefully someone will know what I am talking about. I want to buy one of these machines. You can email me, I will provide my phone number, I would like to talk to someone with knowledge if possible. i thought i would get the most response in the automotive category given the choices. thanks.
One reason for the big difference in the appearance of those welds could be that some flux core wire is designed to be used WITH a shielding gas.
It seems that Flux Core is chosen not just in an effort to avoid the use of a shielding gas. It has other advantages like deep penetration and less required cleaning of the base metal. You'd think that companies using flux-core wire would save the money, and skip the gas...but the results when using the shielding gas must provide an advantage to them. Perhaps it reduces slag inclusions, and, like you experienced, it makes really pretty welds that are easy to clean.
You may have used a nice, high-end machine, with a quality consumable, AND a shielding gas. That's bound to give you prettier results than a low-end machine, with no gas, using a gas-free flux wire.
I have a Millermatic 251, but I use solid wire and a shielding gas. The results have been wonderful, so I've not had a need to even explore the use of flux-cored wire. Perhaps you might find the same thing to be true, if you get a higher-end machine and use gas.
If, however, you know that you'll need flux-core wire, do some research into the consumables, and see which ones may benefit (or require) the use of a shielding gas. I don't know anything about flux-core wire. You might find some information at the Lincoln or Miller websites. For the record, my Miller is a great welder, and I'm very pleased with the purchase.
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