I dont think it does it may be an option to un do the wires inside but it sounds a bit long winded
why do you have to change it
or is that a silly question
I was one of the ones that noticed no difference. Though from Matt's posts it seems the difference becomes more noticeable on thicker steel (my ecperiments were on 1.5mm). Might vary with welder too.
I'm guessing the Clarke 135? I was mostly messing with a Clarke 90EN where I could directly compare the polarity but only on thin stuff. I remember you mentioning a big difference with gassless. The welders ought to be similar - were you welding huge thicknesses? Of should I try for a new theory?
The big difference was with gas. With the wrong polarity had no penetration and weld sloppily piled up. It was as if the drops from the wire were repelled by the metal and thrown around.
I was using a minimum wire speed and 1/8" steel. Later I learned that a faster wire speed worked better.
Ahh - I only tried it the other way around. Will have to play again. Only trouble is everytime I buy a reel of gasless I do an experiment for 5 minutes then give the remainder of the reel away to someone - will need to buy another reel.