I've just converted a CNC from steppers to AC servos. With the maximum value of KI (in the PID loop), there still isn't enough 'holding torque', like there was with the steppers. Increasing KI *considerably* does give a good result, but then there are oscillations that can't be damped out. The maximum value of KI that's stable still allows about .01" of play.
Does this mean I just need a bigger servo motor?