Guys,
What is Auto-Tune and why would you need to auto-tune a drive after entering the appropriate parameters?
Auto-Tuning is the ability of a drive controller to execute a procedure that interacts with a motor load to determine the proper coefficients to use in the motor control algorithm and to determine motor parameters for optimal commutation.
Auto-tune makes the drive motor combo more efficient and basically mates the two together. If you replace the motor, you will need to auto-tune again, likewise if your drive gets replaced you'll need to perform an auto-tune when you are starting your initial setup.