Both FFF (plastic) and continuous fiber 3D printing have a number of limitations. The restrictions are that it is not possible to reinforce parts in two planes at the same time. Since the layers are stacked parallel to each other, the part can only be reinforced in the same plane.
The second limitation is in difficulty printing curved shape models because the extruder cannot move out of the plane so that the nozzle remains always perpendicular to the point where the material is laid out.
However, there is a way for ‘’true 3D printing’’ with continuous fibers. It’s Anisoprint 6-axis robot that allows reinforcing parts of any shape in different planes.
The robot includes a 6-axis robot arm and an end-effector printing with continuous fiber. The robot’s axes allow moving freely in the hemisphere and print parts of complex shapes, without additional supports, molds and tools.