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Yes that's how you would do it when using Analog spindle axis but you still need to set in combination with the pulley Min/max speed to do it properly and get away from spindle over or under speed...

On my system the 0-10 volts goes to an inverter and that is configured accordingly so that 10v = top speed.
To get the S command working so it was 1:1 relationship I played about with the numbers...

Probably not using a VFD eddy it's most likely just using DC speed controller.? . . . . But in either case the principle is the same and the VFD should display the speed in relation to the voltage...

You can set it so that in the G-code an S instruction will select the right speed. For example if you put S18000 it should rotate at 18000 rpm, then calibrate the vfd keypad display so it shows the...