M O T I O N | P O S I T I O N I N G
PZ302EK 1.0.0 11/2019. 0.5
Models with an open housing:
X
When handling the piezo actuator, wear
powder-free nitrile or latex gloves.
X
Prevent the piezo actuator from coming
into contact with conductive liquids (e.g.,
finger sweat) and conductive materials
(e.g., metal dust).
Excessively high or wrongly connected opera-
ting voltages can cause damage to the piezo
actuator.
X
Use compatible electronics and cables from
PI only.
X
Pay attention to the operating voltage
range of the piezo actuator (refer to user
manual).
X
Pay attention to the pin assignment res-
pectively the polarity of the stranded wires
(refer to user manual).
The constant application of high voltage to
piezo actuators can lead to leakage currents
and flashovers that will destroy the ceramic.
X
If possible, limit the maximum operating
voltage during continuous operation.
X
Discharge the piezo actuator when it is not
in use.
Mechanical Dangers
Mechanical forces can destroy the piezo actu-
ator.
X
Avoid shocks and drops.
The piezo actuator can be damaged by pull
forces acting on the stranded wires or the
connecting cable.
X
Avoid pull forces on the stranded wires or
on the connecting cable.
High torques when tightening the load and high
loads can overload the movable part of the
piezo actuator. Mechanical overload can cause
damage to the piezo actuator and the flexures
and can also lead to loss of accuracy.
X
Pay attention to the torque range specified
for the screws used during installation
(refer to user manual).
X
Do not exceed the maximum permissible
torque (refer to user manual) on the mo-
vable part of the piezo actuator.
X
Do not exceed the maximum permissible
load capacities according to the specifica-
tions (refer to user manual).
Excessively high operating frequencies can
destroy the piezo actuator.
X
Select the operating frequency according to
the application.
X
Pay attention to the resonant frequency
and dynamic forces (refer to user manual).
Excessively steep edges in the control signal or
excessively fast discharging can trigger a strong
mechanical impulse and damage the piezo
actuator.
X
Avoid steep edges in the control signal.
X
Discharge the piezo actuator before
short-circuiting.
X
If the connecting cable is accidentally
pulled out during operation, switch off the
electronics before you reconnect.
Uncontrolled oscillation can damage the piezo
actuator or your application. Oscillation is indi-
cated by a humming noise and can be caused by
the following:
▪
▪
A change in the load and/or dynamics
requires the servo control or operating
parameters to be adjusted.
▪
▪
The piezo actuator is operated near to its
resonant frequency.
X
If oscillation occurs, switch off the servo
mode of the electronics or stop the piezo
actuator immediately.
X
Check the servo control settings respec-
tively the settings for the operating para-
meters (refer to user manual).
Models with open housing:
Touching live parts during operation can result
in minor injury from electric shock.
X
Do not touch the piezo actuator during
operation.
X
Insulate the piezo actuator electrically
from the surrounding mechanics before
startup to prevent direct or indirect contact
with live parts. Pay attention to both the
clearance and creepage distances required
for the operating voltage and the standards
applicable to your application.