 Measures System Response,
 Step and Settle, Resonant Frequency,
Bode Plots
Allows Optimization of all Servo Parameters
Increases Throughput
The new NanoCapture Software (for Windows 95/NT) increases the versa-tility and performance of the E-710 Digital Piezo
Controller. In addition to standard functions for the operation of Piezo NanoPositioning Systems, NanoCapture features
advanced measuring and analysis functions such as resonant frequency, overshoot (Fig. 13), step and settle, Bode plots
(Fig. 14), etc. These features are specifically useful when the mechanical properties of a (factory-) calibrated system are
changed at the operational site by parameters such as increased or reduced payload, different orientation or different
damping conditions. In this case, servo parameters such as gain, notch-filter frequency, etc. need to be adjusted to maintain
optimum system response and stability. NanoCapture supports the operator pro-viding system resonant frequency, rise and
settling time by analyzing the dynamic position feedback data of the NanoPositioning System's integrated capacitance
sensor (no other metrology or measuring instruments are required!). Based on these data, servo parameters are easily
adjusted for optimized settling under any load condition (Fig. 15). NanoCapture even allows setting the position sensor's zero
position for a perfect match of the Piezo Controller's |
electrical range and the NanoPositioning system's mechanical range.
All settings (downloaded to the E-710 Controller) are stored in non volatile flash RAM. PI keeps data files of each E-710
Controller calibrated at the factory for easy restoration of the original settings after shipping.
Fig. 13, Open Loop System Response (measured with
NanoCapture)
Fig. 14, Bode plot (measured with NanoCapture)
Fig. 15, Closed loop step and settle after optimization
(measured with NanoCapture)
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