broke out my 235 today for the first time since i purchased off steve before Christmas what a machine lay down a bead perfect but it decided to stop working on me, tried a gun off my old machine (new gun) still no action so decided to wrap it up for the day.After put it all away it suddenly dawned on me that my dad walked passed and put my battery makita drill on the piece that i was working on (side door off 7.5 ton tipper)and i remember reading somewhere before that the welder is shielded in some way that wouldn't let it work is this right or am i dreaming it