12v --> 10v Nowforever D100S2R2B inverter & MKS-V-V02 CDXHCTECH board

[EddyCurrent]

My interpretation of the E100 manual is that - yes - it provides a 12V supply to the speed controller but that the AI1 input still remains expecting a value from 0-10V from 0-100% RPM. That's pretty much backed off with the graph that the OP provided (full RPM at 20000dmd/24000full x 12V(ref) = 10V). Reading the manual the value for the AI1 input is programmable from 0..10V, but not beyond. There is a gain setting that can be applied also, but I'd expect, again, that requires that the AI1 input is limited to 10V. My concern is that the response to the AI1 input will be limited at 10V, and so no amount of scaling applied by the controller in the VFD would counter this.

What you say is correct but;
1. Regardless, the vfd diagram does show the input connected to 12v
2. I never intended that the parameter should go beyond 10v because that is obvioulsy it's limit set in the firmware, my intention was to set it so that whatever was output from Mach3 e.g. S20000 actually produced 20k RPM at the spindle.