Whip and pause with 6013s? - Page 1

DCEP versus DCEN with STICK.

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QUOTE FROM ANOTHER SITE.
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QUOTE:

"... 3. Direct current electrode positive (DCEP) is essentially the former term for reverse polarity, while direct current electrode negative (DCEN) is what we used to refer to as straight polarity. I suspect there was a shift similar to when the term library was changed to learning resource center.
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In DCEP, the electricity courses into the tip of the welding rod, focusing roughly two-thirds of the heat, which helps achieve a deeper penetration. DCEP is typically preferred for thicker steel pieces.
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Conversely, in DCEN, the electrical current exits from the rod, thereby concentrating about one-third of the heat on the rod itself. This results in lesser penetration, making it an ideal selection for thinner materials.
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At this juncture, some of you might be eager to contest my assertion regarding penetration. There are journal articles indicating that DCEN provides superior penetration. It required me to sift through a trio of different journals before I found one that acknowledged my perspective. Nonetheless, they converge in agreeing that DCEP offers the best welding characteristics, complemented by a cleaning action that is absent in DCEN.
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This is all part of welding theory, and from my experience working DCEP on various projects—ranging from high-rises to nuclear facilities and dams—I've never opted to use DCEN. Supporting my instructional theories, the attributes of DCEP, combined with the heat concentration at the electrode tip, initiate a kind of jet action and gas expansion at the tip of the electrode. This phenomenon propels the molten metal across the arc speedily. The impact of this molten metal onto the base also adds to the quality of welds, encouraging deeper penetration. This perspective resonates with the findings in "Modern Welding" by Althouse, Turnquist, Bowditch, and Bowditch.
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Further corroborating my claims, The Hobart School of Welding's Welding Guide affirms: "Electrode negative (straight polarity) is often utilized when a shallower penetration is needed, while electrode positive (reverse polarity) is typically employed for deeper penetration needs."
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To validate my assertions, we conducted an experiment dragging a 1/8-in. rod over an 11-gauge shim. The results illustrated that DCEP burned through in one-and-a-half inches, while DCEN succeeded in burning through only after three-and-a-half inches. I find this empirical investigation highly supportive of my thesis!
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I readily acknowledge that DCEN yields better results in gas tungsten arc welding (GTAW), but that's a different discussion due to the nature of the tungsten electrode. Exerting significant heat on the smaller diameter tungsten using DCEP may lead to the electrode melting away. The capacity for heat output with DCEN permits more penetration.
In some machines, a switch facilitates transitioning between AC, DCEP, or DCEN; in others, a manual change of leads is necessary. ..."

DCEP versus DCEN with TIG.

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