How can you verify that the wire is feeding properly through the contact tip?

How can you verify that the wire is feeding properly through the contact tip?

• A. Observe a steady arc with minimal bird-nest
• B. Observe a flickering arc
• C. Turn off the shielding gas to test feed
• D. Inspect the weld after cooling to confirm feed status

Answer: (A)

A steady arc with minimal bird-nest shows the wire is being fed through the contact tip reliably and at a consistent rate. When the feed system—drive rollers, liner, and contact tip—is delivering wire smoothly, the arc maintains stability and the transfer remains uniform, which is exactly what you want to confirm proper feeding. A flickering arc, by contrast, points to inconsistent wire delivery, which can come from slipping rollers, a damaged or dirty liner, or improper tension. Testing by turning off the shielding gas isn’t a valid way to verify feed, since gas flow doesn’t diagnose the mechanical delivery of wire and can create unsafe conditions. Inspecting the weld after cooling doesn’t reveal what happened during welding, so it won’t confirm whether the wire fed properly through the tip.

A steady arc with minimal bird-nest shows the wire is being fed through the contact tip reliably and at a consistent rate. When the feed system—drive rollers, liner, and contact tip—is delivering wire smoothly, the arc maintains stability and the transfer remains uniform, which is exactly what you want to confirm proper feeding. A flickering arc, by contrast, points to inconsistent wire delivery, which can come from slipping rollers, a damaged or dirty liner, or improper tension. Testing by turning off the shielding gas isn’t a valid way to verify feed, since gas flow doesn’t diagnose the mechanical delivery of wire and can create unsafe conditions. Inspecting the weld after cooling doesn’t reveal what happened during welding, so it won’t confirm whether the wire fed properly through the tip.