open loop mode: 100% motion - closed loop mode: 80% motion

Why can I reach in closed loop operation only 80% of the motion in open loop operation?


When piezo actuators with a measurement feedback system are operated in closed loop, the full motion will not be available.
The control system needs a voltage buffer to reach the specified critical limits of the zero point and the maximum motion in the specified control response time. The decrease of the motion is approx. 20% of the overall value.


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