Use panel clamps. They will keep your gap perfectand are the difference betweeen an ok butt weld and ok one. Flip piece over to see your penetration. It looks like your weld is sitting on top of the metal. If you grind for appearance which on sheetmetal I am assuming it is an exterior panel you will seriously weaken weld and joint. Turn up heat one click and gap should be thickness of metal for a rough estimate.
|