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Arc does not ignite
- Cable loose or bad connection
- Strong oxidisation of torch electrode
- Impurities (moisture, air) in shielding gas
- Insulation fault in the torch (“sparks escaping”)
- Water leakage in torch
- Too large or blunt electrode at small current settings
Poor gas shielding
- Impurities in shielding gas
- Impurities in base materials
- Spatters in gas nozzle or tightening bush
- Gas lens grid damaged
- Tightening bush or housing damaged
- Gas flow rate too low or high
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