Hi all.I am new to this site and only been tiggin' a couple of months.
Got the equivalent of the 210ext just before xmas,main differences are its blue,50Hz and no fancy perspex face cover,as im in the EU
Anyway,the question mightnt even be machine specific....
When welding alumin(i)um,i sometimes hear the arc breaking for a split second,normally when into a longer run i.e. 5 or 6 inches (shorter than that it doesnt occur)
its only brief,and not visible as it happens,or when inspecting the weld after finishing.on occasion it gets more pronounced and on a rare occasion you can see the arc flicker.
it seems like a break in earth/ground.
my question - is aluminum sensitive to earthing more so than steel?it seems to occur as the piece gets hotter?
couple of points,it does not happen on DC
i am nowhere near pushing the duty %,as it happens on 1mm the same as 6mm
tungsten type and prep make no change
thanks
