I am currently tuning a servo motor,
with the option autotune in "measurement and automation" there is given
a sine function to the motor with an increasing frequency.
Input and output compaired give a bode plot and the transfer function
is calculated (and PID values are suggested and phase and gain margins
calculated)
I want to determine the bode plot of the open loop proces
However
Q1 : How can I extract these values of the bodeplot to a data sheet? Can I know the transferfunction too?
Q2 : Amplitude is zero on the far left of the graph indicating this is
a closed loop, shouldn't this be an open loop to determine the phase
and gain margins?
Q3 : Do I have to pull out the cable of the encoder of the motor myself to create an open loop or is this done on the card?
