keep your focal point at the bottom surface or 1 mm below the material and use the 10mm gas param to start with. whats your focal lens. nozzle dia
Sarin
Hi "loak"
can you describe your chamber. material - weld configuration, penetration, laser parameters. did you try to cool the chamber? or tried to provide cooling closer to the weld joint.
Sarin
Scientist,
Centre for Laser Processing of Materials.