The more I find out the less I know. Have been quite happily buzzing along performing "farmers" welds for quite a number of years now oblivious to the fact that there might be more to welding than a shower of sparks, dipping into these forums for a wee while opened my eyes to the science behind it all, so a few questions and apologies if they are covered elsewhere. First one, never knew anything about wire speed creating the power requirement for the metal thickness and that I should find out the wire feed rate per minute so had a go measuring it. Question , is the wire rate/minute the same for all thicknesses ie. is 315 feet/minute the same whether its 0.8mm or 1mm etc. wire and is there a link to a table I could use as a reference to multiply the wire thickness by to get the amps ie. read on here 0.8 has the wire speed divided by 2, what are the others?