Re: Flux-core/MIG for frame welding?
i do all my welding for this hobby with a lincoln electric flux core (fcaw) machine - i have access to other tools but choose this for portability and just because so many people tell me it "can't" be done. I can always make reliable welds, but on a good day i can make 'em fairly purtty too!
Welding bicycle tube, particularlly butt welding bicycle tube, is tough. It is thin and has got paint or chrome covering, it burns athrough fast.
getting the settings correct is critical
prep is critical
steady distance is critical
extra lighting on your work can improve your output
Sometime i use inserts.
I like my FCAW machine, and it is super portable