This weekend I'm renting a aluminum welding unit that will connect to my ranger8 welder, what I need to know is - do I use ac current or will dc straigh/reverse polarity be better? It has been such a long time since I have welded aluminum with a 1lb spool gun so I can't remember how to set up the machine. Any help will be appreciated
Thanks
Gary
DC for aluminum MIG. AC for aluminum TIG.
Gary
some have posted that using MIG dc on Al requires DCRP. is that the case ??
DCEP... verified here:
What Polarity Setting is Needed? All MIG welding, including on aluminum materials, requires electrode positive polarity, while flux-cored processes typically use electrode negative. If you are switching your wire feed welder between processes, make sure to switch your polarity. This is a common mistake that many beginning welders make.
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