3D printing techologies
1. FDM/FFF
1.3. Polar
The least used system of printers. The movement is based on a print head that moves on two axes and a rotating build platform. The printer is simple in construction, but the execution and preparation of a model for printing are relatively complicated.

Source: Zaklad do 3D Tisku s Jozefom Prušom – Jozef Pruša