Soldering Stranded Wires To A Piezo Actuator (Models Without Stranded Wires Only) - PI P-88 Series User Manual

5 Installatio
5.2 Soldering Stranded Wires to a Piezo Actuator (Models Without
Stranded Wires Only)
This section describes how to solder stranded wires to the models without stranded wires.
If your application permits it, we recommend using models that already have stranded wires.
NOTICE
Destruction of the piezo actuator due to incorrect soldering!
Long and repeated soldering processes can dissolve the termination layer that creates the
contact between the inner electrodes and the contact strips of the piezo actuator. The
dissolution of the termination layer destroys the piezo actuator. In addition, the piezo ceramic
can be damaged by depolarization when it is continuously heated above the Curie
temperature.
 The soldering temperature should not be any higher than necessary (max. 350 °C).
 Make sure that the soldering time does not exceed 1 to 2 seconds.
 Use the respective soldering point only once to solder a stranded wire.
If you have to repeat the soldering process:
1. Allow the solder point to cool down.
2. Desolder the stranded wire from the soldering point.
3. Use a different (pre-tinned) soldering point to solder the stranded wire again.
NOTICE
Damage from mechanical stress on the solder connection!
Mechanical stresses (e. g., shear forces) on the solder connection can damage the piezo
actuator.
 Make sure that stranded wires that move are relieved of strain with shrink tubing.
 Solder the stranded wires so that the distance between the soldering point and the firmly
clamped side of the piezo actuator is as small as possible. This reduces mechanical stresses
especially during dynamic operation.
Design and polarity of the electrodes
Figure 9:
22 Version: 1.1.0
Standard electrodes (example view of the contact strips)
PZ259E P-88x/P-08x Piezo Actuator