What is steps would you undertake if the welding machine emitted smoke while in use?

If a welding machine emits smoke while in use, I would immediately stop the operation and unplug the machine to prevent further risk. Next, I would assess the situation for any visible signs of damage or malfunction, such as burnt wires or overheating. If safe to do so, I would allow the machine to cool down and then inspect it for any issues. Finally, I would consult the manufacturer's guidelines and, if necessary, contact a qualified technician for repair or maintenance before using the machine again.