Been practicing today and have some more questions
I've turned the power right down to number 1 and can get good welds with wire speed set to number 8-9
However, in some instances I have noticed the same sound and an almost complete loss of weld whilst practicing
These instances have been where my scrap piece of metal has paint on the reverse side of it - I've ground the side I'm welding so that it's clean, but not the reverse face (as I can't access it)
Would this paint account for this (in this instance) ?