Fronius MTG 270i US-Style Manual De Instrucciones página 45

Porosity of weld seam
Cause: Spattering in the gas nozzle, causing inadequate gas shield for weld seam
Remedy: Remove welding spatter
Cause: Holes in gas hose or imprecise gas hose connection
Remedy: Replace gas hose
Cause: O-ring at central connector is cut or faulty
Remedy: Replace O-ring
Cause: Moisture/condensate in the gas line
Remedy: Dry gas line
Cause: Gas flow too strong or weak
Remedy: Correct gas flow
Cause: Inadequate quantity of gas at the start or end of welding
Remedy: Increase gas pre-flow and gas post-flow
Cause: Rusted or poor quality wire electrode
Remedy: Use high-quality wire electrode without soiling
Cause: Applies to gas-cooled welding torches: Gas leakage with non-isolated inner
liners
Remedy: For gas-cooled welding torches, only use isolated inner liners
Cause: Too much parting agent applied
Remedy: Remove excess parting agent/apply less parting agent
45