The NELD NELD-3DMA-3-KR27-210 robotic arm 3D printer uses concrete mortar and other additive materials as raw materials, and builds 3D solids through nozzle extrusion and layer-by-layer deposition. The robotic arm 3D printer is a high-end industrial-grade, robot-integrated 3D printing system. It integrates and innovates technologies in the fields of large-scale, free-form-surface and intelligent additive manufacturing, and deeply combines the flexible motion capability of industrial robots with high-performance additive manufacturing processes.