First of all thank you very much for sharing your knowledge.
I would like to change the CNC controller of my machine and I have thought about the UC300 card. The doubt arises from the spindle speed control. My current VDF seems to be controlled by a 0-5 V input (PWM ???). I have reviewed information on the web, in the forum, I have contacted vendors but so far they have not resolved my doubts. I am going to attach a photo of the control port of my current VDF. Let's see if you can help me and clarify my doubts. Thanks in advance!