PI P-843 - Troubleshooting

9 Troubleshooting
No or limited motion
Cable not connected correctly
► Check the cable connecons.
Excessive load
► Do not exceed the maximum push/pull capacity
according to the specicaons (p. 28).
Zero shifting of the position sensor for the
following reasons:
Load in direction of motion
Surrounding/operating temperature of the
piezo actuator is much higher or lower than
the calibration temperature (21 °C to 24 °C)
► Readjust the sensor's zero-point (see manual for
the electronics).
Piezo actuator is depolarized due to over-
heating
► Contact our customer service depart-
ment (p. 27).
Defective actuator
► If possible, replace the defecve actuator with
another actuator and test the new combinaon.
Reduced accuracy
The electronics or mechanics were replaced
► Recalibrate the axis displacement (see controller
manual) or contact our customer service depart-
ment (p. 27).
Axes were mixed up during connection
► In the case of calibrated systems, pay aenon
to the assignment of the axes when connecng
several piezo actuators to a mul-channel con-
troller. This assignment is indicated by labels on
the devices.
The piezo actuator starts oscillating or positions inaccurately
Servo control parameters set incorrectly be-
cause for example, the load was changed
► Switch o the servo mode of the corresponding
axes immediately.
► Check the servo control parameter sengs on
the controller.
► Adjust the servo control parameters on the con-
troller according to the load change.
Operating with an excessively high frequen-
cy
► Operate the piezo actuator at a maximum of one
third of the resonant frequency (see "Data Ta-
ble" (p. 28) for resonant frequency of the un-
loaded piezo actuator, see "Calculang the Maxi-
mum Operang Frequency of the Loaded Piezo
Actuator" (p. 19) for resonant frequency of the
loaded piezo actuator).
9 TROUBLESHOOTING P843M0001EN ‒ 2/23/2021
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