What causes the arc to scatter/jump around when I try to lay a bead in the joint between a vertical piece of aluminum on a horizontal piece? It doesn't happen all the time, but I don't know what I'm doing to cause the problem or what I'm doing to not make it happen.It also leave a black soot behind when it happens.
Reply:black soot usually means air got into the arc zone and pushed the gas away. Or the metal is not clean enough. make sure your gas flow is not to low or to high. also look for a draft. Each nozzle and diffuser combination uses a different flow rate. Check all your gas hose and fittings for leaks. including the torch. A hole in just the right place will allow air to enter the gas stream. when the air bubble hits the arc it will make a noise and black soot. no gas at all will leave yellow soot on the cup.
Reply:
Originally Posted by ccawgc
black soot usually means air got into the arc zone and pushed the gas away. Or the metal is not clean enough. make sure your gas flow is not to low or to high. also look for a draft. Each nozzle and diffuser combination uses a different flow rate. Check all your gas hose and fittings for leaks. including the torch. A hole in just the right place will allow air to enter the gas stream. when the air bubble hits the arc it will make a noise and black soot. no gas at all will leave yellow soot on the cup.
发表于 2022-1-15 15:51:21
