Advances in smart technologies and digital tools are revolutionizing the production industry. This forth revolution is also called Industry 4.0. Elements of this development are digitalization and robotization, machine learning, man-machine interaction and mass customization. In this reality, industrial robots are used as versatile production machines in smart mass-production facilities, yet able to fabricate every object slightly different from the previous one, according to customer specifications. This is common practice in automotive industry. CW4N envisions Industry 4.0 wood upcycling factories. Here, robots and algorithms are used for 3D scanning, sorting, sawing, milling and more. A full production process for circular objects made from an ever changing variety of pieces of wood.