Hello, I am new to this newsgroup and never done any electric welding until recently. I have a few questions and wondering if anyone could explain and perhaps give me a few tips.
I have recently bought a Lincoln Electric Mig welder (115 volts unit with 60 amp @ 15amp circuit or 88 amp to 20amp circuit). The unit can be fitted with Argon gas (separate regulator is required) however I choose to go with flux core wirefeed. I am trying to weld car body panel (20 awg sheet metal to existing floor pan of my car).
Questions: Sheet metal preparation: Electric wire brush on clean metal is it okay? Also sheet metal come with like coated oil to prevent rust, can I wipe it down with a rag or do I have to clean it with cleaning solvent?
After about 1 hour on and off welding, my thumb (triggering thumb) feel funny for hours after. Why?
How dangerous is the fume from flux core if inhale?
Is it necessary to run a solid seam of or tack the metal at 1/2 inch distance?
The welder manual said when using flux core, the power must be reversed (which I did) why?
Thx in advance for your help.
Paul