Machines and machine tools for recovery and treatment of unfused powder used in 3D printing; machines and machine tools for removal of excess unfused powder from 3D printed products; additive manufacturing post-processing systems, namely stations for removal and recuperation of unfused powder from additive manufactured build volumes, and optionally for treatment of the recovered powder and dosing of the recovered powder with new powder for reuse in additive manufacturing of 3D parts; additive manufacturing post-processing systems, namely depowdering stations for removal and recuperation of excess powder from additive manufactured parts.