so my power supply is 24v, i hooked up 30v to the motor and it does increase the rpms when i do that grbl 0.9 is what im using. Someone stated if I upgrade the firmware or edit the config.h file. I can get grbl to allow me to max rpms at 10,000,,, but with grbl 0.9 as it is now, I cannot make the actual motor go over 1000 (without increasing the voltage directly to the motor)
the control boards power supply shipped with it is 24v (it will take up to 36v) and at 1000rpm the voltage on the motor is 24v