Applying The Load - PI P-88 Series User Manual

5 Installation
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Applying a preload
 Apply the preload near the axis within the core cross section of the piezo actuator.
5.5

Applying the Load

The P-88x/P-08x can be coupled to a load in various ways, depending on the application:
Gluing the piezo actuator (p. 26) into the mechanical system to be moved or into a
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flexure
Using a ball tip:
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INFORMATION
Diagrams showing how to couple the P-88x/P-08x to a load can be found in "General Notes on
Installation" (p. 20).
Requirements
 You have read and understood the general notes on installation (p. 17).
 The P-88x/P-08x is discharged (p. 39) and short-circuited (p. 40).
Tools and accessories
Suitable adhesive (e.g., cold-hardening epoxy resin adhesive)
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When using a ball tip: Suitable ball tip
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When using a flexure: Suitable flexure
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Applying the load

 Apply the load evenly.
If the piezo actuator is coupled in a milling pocket:
 Ensure that there is full-area contact at the end surface of the piezo actuator. For this
purpose, choose the dimensions of the milling pocket correspondingly or make free
cuts in the milling pocket.
If a point load is applied to the end piece of the piezo actuator:
 Dimension the end piece so that its thickness corresponds to half the cross-sectional
dimension in order to prevent tensile stress on the piezo actuator.
P-88x/P-08x Piezo Actuator
With highly dynamic applications:
The resonant frequency (p. 47) of the preload spring exceeds that of the piezo
actuator.
Gluing a hardened ball tip, which establishes a single-point contact to an even
surface
Gluing a hardened ball tip, which establishes a ring-shaped contact to a calotte
PZ259E Version: 1.1.0 27