What is the discharge gap of the NC wirewheel cutting and is not related to the thickness of the material? The spark gap of the mold!
Generally 0.01-0.025, and the relationship between the thickness of the material, which is mainly due to the relationship between the speed of processing, my experience is the higher the frequency of the faster the gap is smaller, and vice versa is the opposite.
But the gap you ask someone else is useless, because the machine, electrical parameters, working fluid ---- can not be exactly the same, and these are related to the gap.
First with T15 material cutting diameter is 15 (I think the smallest but also the diameter of 15) round or square