HARBOR FREIGHT 90 AMP FLUX WIRE WELDER MANUALS
Even the Harbor Freight manuals for the 170 and 180 amp units say that flux core should be DCEN. Everyone including Steve Bleile, ChuckE2009, Miller, and everyone else says that flux core welding should be DCEN. Now during the building of my new gasifier I am taking some YouTube courses on flux core welding, and the topic of DCEN comes up over and over. ChrisAdmin and Wayne Keith both highly recommend a quality welder for gasifier building, and I agree. I was a bit confused and intimidated by that statement, though, and never seriously considered it. I read one reviewer say that he modified his HF welder to weld with DCEN (direct current electrode negative) instead of A/C. However, I decided it would work on my truck exhaust system, and it did. I asked my brother, an experienced MIG welder about flux core.
I studied the reviews on the HF website over a period of time before buying it.
Now I still have the welder, and I’m building a gasifier. I have the 90 dollar 90 amp flux core welder from Harbor Freight (item #68887) that I paid for by doing the muffler job on my truck two and a half years ago. Behold some simple, cheap modifications to turn a metal glue gun into a higher performance machine with a rock solid arc that welds like a dream.
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