Hi every expert:
I am thinking about choosing HobbyCNC board for my first CNC converting project. Seems like this board is perfect for all 4 axis control, but how to control the speed of the main spindle motor (cutting tool motor)? or just simply switch on the motor and let it run at high speed during the whole working process? (in this way, just simply power on the main spindle motor and power off after the job finished?)