Laser welding has developed into one of the most used joining techniques in sheet metals for applications such as car bodies, medical devices, sensors, batteries, and more. To create successful welds in a serial production, many parameters must be kept within a defined window of specifications, created once during initial development of the process. Some major parameters that must be met include laser power at the workpiece, laser beam quality, focal plane, beam properties, clean status of optics, hitting the seam, cleanliness of the parts, a gap between the parts, welding speed, and machine accuracy…