Mini Mill CNC Conversion using a KitGuide [2023] MellowPine
The mechanical part consists of replacing the lead screws in the minimill with ball screws and double nuts. The reason why you need a new mechanical system is that the lead screws in benchtop mills have backlash and are not really built for CNC operation. Ball screws have very little backlash and are an excellent choice for a CNC drive system.