by cncdrive » Tue Jul 07, 2020 9:19 pm
I thought you asking help about the UCCNC spindle speed PID control, but now I see that you asking about servo tuning of DGxx drives.
Our setup is not different, there are P (Ap), I (Ai) and D (Ad) gains settings.
There is also PID loop time constant and output limit parameters.
So, it is a generic PID controller. If you will read after how PID controllers work then you should understand which parameter does what.
Do not expect a direct relation like "what do what", PID controllers are analog control loops, each parameter influences the loop stability and loop responseness in different ways,
and the parameters work together to form the control loop. But again, if you will read some articles you should understand it quickly.