For robotic welding, where the workpieces are large and the robotic arm has a wide range of motion, it's difficult to capture the fumes at a fixed point. The solution is to confine the fumes within a closed or semi-closed space, ensuring proper ventilation to prevent fumes from escaping and affecting the workshop environment. This can be addressed through individual fume extraction and purification at each station or a central fume purification system for multiple stations.