Re: Project: Tow-Rat (Lil' Blue)
An undercut weld happens when you are welding to slow, welding too hot, or welding at the wrong angle. This will cause a cavity to form either below or above the weld and result in a weaker weld. To fix this turn down your amperage, speed up your weld, and turn up your wire speed to help fill in the weld.
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