Watch this 4-Axis 3D printer in action

While Fused Deposition Modeling (FDM) 3D Printing has become accessible to the masses, the original approach utilizing paper or plastic/resin Stereo Lithography (SLA) machines from the 90's have merely become refined and enhanced with a wide gamut of materials and components. In the video below, CNC Kitchen discusses his 4-Axis 3D Printer built after meeting Michael Wüthrich and his team at The Zurich University of Applied Sciences (ZHAWZürcher Hochschule für Angewandte Wissenschaften), where The RotBot was created in the process of publishing their paper: A Novel Slicing Strategy to Print Overhangs without Support Material. With the addition of an extra axis, and multiple G-code slicing sessions from planar to conular and back to planar, it's possible to print specific shape types without the need for support materials.