How to calculate the welding travel speed?

Answer 1

Practice makes perfect. Sorta like painting a line. You have to watch the result and react accordingly. Too slow and the weld widens out and gets too thick (tall), too fast and it narrows down and gets thinner. Also if you travel too slow the edges roll and trap slag. Travel too fast and you get less penetration and the weld is too thin and can crack or cause undercut. As you weld observe the whole picture, where you are going and where you have been (the weld). This applies to all welding processes.