Developed at KIT (Karlsruhe Institute of Technology), this technology offer gives the possibility to have an expansion of dimensional limits in Additive Manufacturing using powder bed processes. Inspired from other manufacturing technologies (e.g. extrusion), modifications for existing machine layouts have been designed and a concept has been developed allowing the operation of an SLM machine in quasi-continuous operation without length limits driven by the process chamber dimensions. Investigated for fusion components manufacturing, this technology and know-how could now find promising applications in the sectors of aerospace, energy and transports for 3D printing of long complex lightweight structures.