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Which is a common cause of undercut in a MIG weld?

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  1. Splitting the arc evenly between both pieces
  2. Welding clean, dry metal
  3. Too much voltage or travel speed too fast

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References

  1. Hobart Brothers, MIG Troubleshooting for Metal-Cored and Solid Wire www.hobartbrothers.com/resources/technical-articles/mig-troubleshooting-for-metal-cored-and-solid-wire Checked 2026-10-10.

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