Hello, I have a general CNC/Encoder question...

I'm developing a CNC Mill and I have closed loop stepper motors with drivers that have encoders input built in.

Example Motor:

I'm looking at potentially using Acorn CNC as my control board which seems to only have one encoder input for the spindle speed.

Question is - do I need multiple encoder inputs on the main control board if my motor drivers already have encoder input?

Would this just be redundant? Or is there some benefit to having additional encoder inputs on the main control board?

Thanks for your time.