This video shows how to make a complete cycloidal extruder that can actually be used in a 3D printer.
STL(free): https://cults3d.com/en/3d-model/vario...
It took me a lot of time to design, make and test before and after. I have also used this to print many models. In order to let everyone pay more attention to and understand this extruder, you can enter this FB group: / 3202068370116874
Note: It is mentioned in the video that you must pay attention to the direction of the cycloidal disc assembly, otherwise it cannot be assembled, please follow the video prompts.