Problem | Probable Cause | Remedy |
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Welding arc not stable. | Wire slipping in drive rolls. | Adjust pressure setting on wire feed rolls. Replace worn |
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| drive rolls if necessary. |
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| Wrong size gun liner or contact tip. | Match liner and contact tip to wire size and type. |
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| Incorrect voltage setting for selected wire feed speed on | Readjust welding parameters. |
| welding power source. |
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| Loose connections at the gun weld cable or work cable. | Check and tighten all connections. |
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| Gun in poor shape or loose connection inside gun. | Repair or replace gun as necessary. |
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