pymadcad VS FreeCAD

I know a software that does some of this stuff written in Python, it's pretty powerfull but it does not cover everything you need. It's on github https://github.com/jimy-byerley/pymadcad

Py-MADCAD is a simple yet powerful CAD (Computer Aided Design) library, written with Python.[0]

[0] https://github.com/jimy-byerley/pymadcad

I tried to use PyMadCAD but once I have created the robotic arm I have no way to control it automatically.

bug reports should be made on the github issue tracker here: https://github.com/FreeCAD/FreeCAD/issues

Try this https://www.freecad.org/

FreeCAD is a general-purpose parametric 3D computer-aided design (CAD) modeler. This open-source software application is based on C, C++, and Python. PVS-Studio doesn't support Python at the moment, so I will only check the C and C++ parts. Here is the link to the project code.

LibreCAD, OpenSCAD (more script based and more for solids), FreeCAD.

would freecad be an option?

Hi! 3d printers read .stl files, generally. You can design your own files for free with FreeCAD in a relatively simple format before sending them to your slicer and printer. Out of personal experience, design a silicone component into your mold, as the hard plastic is unforgiving when de-molding. Good luck!

Second Way: I don't use this second method as the first one already works for me. However, you can download FreeCAD, which is an OpenSourced Free to use software for many hobbyists. I personally think it's slightly trickier to get used to but it works! You can watch this video to model a nose cone in FreeCAD.