Glowing red ball on the end of solid wire?

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I'm building some items, each one has over 100 welds on it. After some of the welds, there's a glowing red ball on the end of the wire but after others the wire looks normal. Welding 1/2" rod to 1/4" bar, Hobart 210 MVP, Lincoln SuperArc L-56, CO2 gas. I Googled to see what might be causing that but came up empty. I'm curious about it, any suggestions?
Reply:Depending on your settings and whether or not you have too much voltage to "compensate" for straight CO2, you might be in Globular transfer mode, and it just didn't make it across the arc.

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Reply:Possibly after many welds the gun, diffuser, contact tip is hotter and it is just staying glowing a little longer? I have seen the end of my wire glow for a second or two, but never worried about it because I just got done melting steel with it. I can't imagine anything causing it to glow other than the completed weld."Where's Stick man????????" - 7A749"SHHHHHH!! I sent him over to snag that MIC-4 while tbone wasn't looking!

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Reply:Watch a slow mo video of a mig arc and you'll understand the glowing red ball like what oscar just described.Ol' Stonebreaker  "Experience is the name everyone gives to their mistakes"Hobart G-213 portableMiller 175 migMiller thunderbolt ac/dc stick Victor O/A setupMakita chop saw
Reply:Turn the burn back setting downMurphy's Golden Rule: Whoever has the gold, makes the rules.
Reply:I have noticed that when the weld is small, like a tack, I don't usually get the red ball. But when it's longer nearly always the red ball shows up. It doesn't cause any problems, I'm just curious about it. So maybe the extra heat somehow does cause it. I don't know anything about globular transfer but when I read about it, that also seems possible. That welder doesn't have a burn back setting.
Reply:

Originally Posted by Munkul

Turn the burn back setting down
Reply:Some of the modern equipment out there has a wire sharp feature. At post flow the wire actually sharpens. No more snipping the blob off. This will be an everyday feature before long. Until then it's blobville.Thermal Arc 320SP ( Lorch )Cobra PythonsThermal Arc 300 AC/DC  ( Sanrex )ESAB 301i AC/DC  ( Lorch )Thermal Arc 161STL  ( WTL )Thermal Arc 190S  ( Sanrex )Cut Master 82, 42. Cut45 ( WTL )Victor Gas Apps.Boxes and boxes of welding crap.