PID speed control in ADC-app

I am using the Vesc and an outrunner SK3 6374 192kV as a spindlemotor in my mill/router and in this case you want to keep motor speed constant regardless of torque required, but this seems to be possible only in PPM-app. It would be better to be able to use ADC-app instead and just adjust the voltage to the input similar to how you do it in a VFD as this is common standard in machinebuilding.

The reason I use an outrunner is the very high torque at low rpm compared to the very high rpm and low torque often used by hobbyrouters.