P-871 PICMA® Piezo Bender Actuators
Low-Voltage Multilayer Piezo Bender Actuators with Position Sensor
P-871.140, P-871.128, P-871.122 and P-871.112 closed-loop bender actuators (from left to right)
P-871.140, P-871.128, P-871.122 and P-871.112 closed-loop bender actuators (from left to right)
  • Closed-Loop Operation for Superior Accuracy
  • Nanometer-Resolution
  • Displacement to 1.6 mm
  • Ceramic Encapsulation for Extended Lifetime
  • Ideal for Scanning Applications
  • Vacuum-Compatible Versions
  • Low Operating Voltage
  • Mounting Hardware Included
  • Special OEM- and Bench-Top Amplifiers Available
E-651 2-channel and 1-channel controllers with P-871 bender actuators
 
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PDF Catalog Datasheet   Application Articles & Background Info
 
Application Examples
  • Wire bonders
  • Pneumatic valves
  • Fiber optic positioning & switches
  • (Laser)- Beam steering
  • Micropositioning
  • Acceleration sensors
  • Nanotechnology

P-871 transducers are unique closed-loop piezo benders based on the open-loop PL 122 to PL 140 PICMA® -series multilayer actuators (see link). Equipped with high-resolution position feedback sensors they provide better linearity, accuracy and repeatability than other piezo benders on the market. P-871 bender actuators achieve longer positioning ranges than typical piezo stack actuators, up to 1.6 mm, while still providing fast response times in the millisecond range.

Design
These multilayer piezoelectric components are manufactured from ceramic layers of only about 50 µm thickness. They feature internal silver-palladium electrodes and ceramic insulation applied in a cofiring process. Due to the thin layers the operating voltage is significantly lower than for classical parallel bimorph bender elements. For ease of installation, the units come complete with the mounting hardware, cables and connectors.

Closed-Loop Position Control for Higher Accuracy
P-871s are ideal devices for scanning, positioning and beam deflection applications and provide much better accuracy, stability and repeatability than conventional open-loop actuators. The special bender design allows the direct application of a strain gauge sensor to the surface without the need for a polymer insulation layer in between. The advantages are faster response, reduced phase lag and precise position control with non-linearity of <0.5%. The settling time for a small-signal step (up to 1% nominal travel) to an accuracy of better than 1% is between 10 ms (P-871.112) and 30 ms (P-871.140).

Ceramic Insulated Piezo Actuators Provide Long Lifetime
Highest possible reliability is assured by the use of award-winning PICMA® multilayer piezo actuators. PICMA® actuators are the only actuators on the market with ceramic-only insulation, which makes them resistant to ambient humidity and leakage-current failures. They are thus far superior to conventional actuators in reliability and lifetime.

Optimum UHV Compatibility - Minimum Outgassing
The lack of polymer insulation and the high Curie temperature make for optimal ultra-high-vacuum compatibility (no outgassing / high bakeout temperatures, up to 150 °C).

Amplifiers, Drivers & Controllers
PI offers a wide range of standard amplifiers and controllers for piezo actuators. The E-651.1S and E-651.2S desktop controllers and the OEM board E-614.2BS (see link) are specifically designed to operate P-871 bender actuators.

Application Articles, Background Information, External Links

Papers & Articles
 
Related Information:
 
P-286 · P-288 · P-289
Piezo Disk Translators (HVPZT)
 
PL112 – PL140 • PD410 PICMA® Bender Piezo Actuator
All-ceramic Bender Actuators with High Displacement
 
P-601 PiezoMove™ Z-Actuator
Flexure-Guided OEM Piezo Actuator with Long Stroke to 400 µm
 
E-651 – E-614 Piezo Amplifier / Servo Controller
Piezo Controller for Closed-Loop Multilayer Bender Actuators
 




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