Tag: tig troubleshooting
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Square Wave 205 TIG Torch Overheating Causes: Amperage, Duty Cycle, Consumables, and Cooling Checks
If the TIG torch on a Lincoln Square Wave 205 gets too hot to hold, discolors the cup, burns collets, loosens tungsten, or overheats the torch head, stop and check amperage, duty…
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Square Wave 205 TIG Gas Lens vs Standard Collet Body: When to Use Each Setup
On a Lincoln Square Wave 205, a gas lens is not an automatic upgrade for every TIG weld. Use a gas lens when you need smoother argon coverage, longer tungsten stickout, better…
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Square Wave 205 TIG Arc Wandering Causes: Tungsten, Gas, Ground, and AC Setup Checks
If a Lincoln Square Wave 205 TIG arc wanders, splits, flutters, or refuses to stay centered on the joint, start with tungsten condition and torch setup before blaming the machine. Arc wandering…
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Lincoln Square Wave 205 TIG Tungsten Contamination Troubleshooting
If the tungsten on a Lincoln Square Wave 205 turns black, balls unevenly, grows a dirty tip, spits into the puddle, or makes the TIG arc wander, stop and correct contamination before…
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TIG Tungsten Contamination Troubleshooting: Black Specks, Arc Wander, Dirty Starts, and Re-Grind Checks
TIG tungsten contamination usually comes from one of five places: the tungsten touched the puddle, the filler rod hit the electrode, shielding gas was interrupted, the tungsten was ground on a dirty…
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Why Stainless TIG Welds Sugar on the Back Side
Stainless TIG sugaring is heavy oxidation on the back side of the weld root. It usually happens when the hot root is exposed to oxygen because the purge is missing, weak, contaminated,…
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How to Fix an Unstable TIG Arc from Poor Tungsten Prep
A wandering TIG arc is often blamed on gas flow, amperage, or the machine. Those issues can matter, but the tungsten electrode is one of the first places to check. A contaminated,…
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Why TIG Tungsten Turns Black Even When the Weld Looks Clean
TIG tungsten turning black is usually a shielding problem, not a mystery tungsten problem. The weld may still look acceptable at first, but a darkened electrode, unstable arc, dull bead edge, or…
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TIG Welds Turning Black and Sooty? Fix Gas Coverage Fast
If your TIG welds are coming out black, sooty, or “dirty,” you’re not alone—this is one of the most common early warning signs of shielding gas problems. It usually shows up mid-bead…
