As I've upgraded my MF70 spindle to ER11 collet, a potential risk is the torque and power of the original motor (as it is only a 100W motor). So I've upgraded it to a high power brushless motor. The new motor is a 3650 kv2300 motor. Although the highest voltage can be 22V and the max. power can reach to 900W at 50,000 rpm, I'm a bit concern about the heating risk. Thus I only use 12V power supply thus the highest speed will be a bit more than 25,000. Comparing to the original motor, this is far more than enough.
Furthermore, my pinciple of upgrading the machine is try to make as less structural change as possible, so that I can easily restore it back to the manufacture status if needed. To achieve this, I've 3D printed 2 parts which almost identical to the original one (only with some adaptation to my new motor). And it works perfectly well.
By now I think it has almost reached the ultimate potential of this MF70 and would be my final upgrade to it. In case I need bigger and more precise CNC machine in future, I'm thinking to build one by myself.
21 окт 2024
