FCW is a fast component welding system by means of stackable compact scanners. For high productivity requirements, welding speeds become necessary that cannot be achieved with standard laser processes. The FCW system technology consists of several compact scanners, so multiple joining processes remain controllable and to secure the welding quality. The system allows a simple and cost-effective parallelization of laser processes. The FCW leads to scaled productivity. The FCW is both adaptive for the gantries and robots. It enables the simplifies automation and customization on site and saves floor space. Every CSC (compact scanner) can make beam deflection in x- and y-direction and focus correction in z. FCW offers high dynamics because each compact scanner is individually calibrated and can be quickly integrated into the system network. The FCW applications are hairpins, prismatic cells, surface cooler for car battery trays and many more. With FCW welding becomes more efficient.