i have been practising my welding on some exhaust tube in preperation for making an exhaust for my car. i have been doing ok but every now and then the weld blows through with no real reason i have my mig set on the lowest power setting and have tried changing the wire speed up and down, i run a few beads and everything is fine, then bang, a hole. any suggestions why this is happening? could the weld be pulling crap through from the inside of the tube, as it is used tubing i am practising on.
Also, even on my lowest setting i seem to be getting too much penetration on the weld, with most of the bead being on the inside of the tube
dont know if these pics will help
Also, even on my lowest setting i seem to be getting too much penetration on the weld, with most of the bead being on the inside of the tube
dont know if these pics will help