But with double arcing, the arc path goes from the electrode to the nozzle and then to the workpiece, which can damage consumables. The typical arc path goes from the electrode to the workpiece. Metal spattering up and around the pierce area can make a costly mess. Until the arc penetrates the plate bottom, molten metal needs somewhere to go. For a fab shop supervisor, though, that photogenic shower of molten metal represents an unfortunate but necessary waste.
All those sparks make for some eye-popping graphics, great for annual reports. Photographers love rooster tails-that splash of molten metal produced as a plasma torch moves and pierces through plate. Photo courtesy of ESAB Welding & Cutting Products. Figure 1: Today’s high-density plasma systems can cut quickly through thick plate, and certain technologies have made the initial pierce less of a challenge.
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