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Preloaded piezo actuators
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- Short instructions (5 pages)
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Table of Contents
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Table of Contents
- 1 Legal Information
- 2 About this Document
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Objective and Target Group
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Explanation of Symbols
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Typographic Conventions
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Symbols Used
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Figures
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Downloading Manuals
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- 3 Safety
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Intended Use
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General Safety Instructions
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Organizational Measures
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User Manual
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General Personnel Qualification
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- 4 Product Description
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Model Overview
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Product Labeling
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Type Plate
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Scope of Delivery
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Overview
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Suitable Electronics
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- 5 Unpacking
- 6 Installation
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Avoiding Mounting Errors
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Mounting the P-844 and Connecting to a Protective Earth Conductor
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Fixing the Load
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Connecting the P-844
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- 7 Startup / Operation
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Determining the Operating Parameters
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Calculating the Effective Mass
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Calculating the Maximum Operating Frequency of the Loaded Piezo Actuator
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Calculating the Forces that Occur During Dynamic Operation
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Calculating the Power Requirement for Sinusoidal Operation
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Starting and Operating the P-844
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Discharging the P-844
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- 8 Maintenance
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Cleaning
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- 9 Troubleshooting
- 10 Transportation
- 11 Customer Service Department
- 12 Technical Data
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Specifications
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Maximum Ratings
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Ambient Conditions and Classifications
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Dimensions
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- 13 Old Equipment Disposal
- 14 Appendix
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Pin Assignment
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14.1.1 Voltage Connector
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- 15 EU Declaration of Conformity
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P844M0001EN ‒ 11/13/2018
User Manual
P-844 PRELOADED PIEZO ACTUATORS
M O T I O N | P O S I T I O N I N G
Table ofContents
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Table of Contents
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Summary of Contents for PI P-844
- Page 1 P844M0001EN ‒ 11/13/2018 User Manual P-844 PRELOADED PIEZO ACTUATORS M O T I O N | P O S I T I O N I N G...
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Page 2: Table Of Contents
Scope of Delivery....................9 Overview......................10 Suitable Electronics..................10 Unpacking........................11 Installation......................... 12 Avoiding Mounting Errors................12 Mounting the P-844 and Connecting to a Protective Earth Conductor..13 Fixing the Load....................14 Connecting the P-844..................15 Startup / Operation....................16 Determining the Operating Parameters............16 7.1.1 Calculating the Effective Mass............16... - Page 3 CONTENTS P844M0001EN ‒ 11/13/2018 Troubleshooting......................23 10 Transportation......................24 11 Customer Service Department................. 25 12 Technical Data......................26 12.1 Specifications....................26 12.2 Maximum Ratings................... 26 12.3 Ambient Conditions and Classifications............27 12.4 Dimensions...................... 29 13 Old Equipment Disposal................... 30 14 Appendix........................31 14.1 Pin Assignment....................31 14.1.1 Voltage Connector................
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Page 4: Legal Information
With regard thereto, Physik Instrumente (PI) GmbH & Co. KG reserves all rights. The use of any text, images and drawings is permitted only in part and only when indicating the source. -
Page 5: About This Document
P844M0001EN ‒ 11/13/2018 About this Document Objective and Target Group This user manual contains the information needed for the intended use of the P-844. Basic knowledge of closed-loop systems, motion control concepts, and applicable safety measures is assumed. Explanation of Symbols This chapter explains the symbols and markings used by PI in their user manuals. -
Page 6: Figures
3. Search for the product: a) Click Search. b) Enter the product number up to the period (e.g., P-844) into the search field. c) Click Start search or press the Enter key. d) If necessary: Click Load more results at the bottom of the list. -
Page 7: Safety
Safety Intended Use The P-844 is a laboratory device as defined by DIN EN 61010-1. It is intended for indoor use and use in an environment that is free of dirt, oil, and lubricants. In accordance with its design, the P-844 is intended for the following applications: ■... -
Page 8: User Manual
► Add all information from the manufacturer such as supplements or technical notes to the user manual. ► If you give the P-844 to a third party, also include this user manual as well as other relevant information provided by the manufacturer. -
Page 9: Product Description
Figure 1: Type plate of the P-844 1. Data matrix code (example; contains the serial number) 2. Product number (example) 3. Serial number (example), individual for each P-844 Meaning of the position (counting from the left): 1 = internal information,... -
Page 10: Overview
6. AF17 wrench flat for open-end wrench Arrow: Positive direction of motion of the tip Suitable Electronics The P-844 must be connected to suitable electronics that supply the necessary voltage for operating the P-844. The following electronics are suitable for operating the P-844: Product number Description... -
Page 11: Unpacking
5 UNPACKING P844M0001EN ‒ 11/13/2018 Unpacking NOTICE Destruction of the P-844 due to mechanical overload! Mechanical forces can destroy the P-844. ► Avoid knocks that affect the P-844. ► Do not drop the P-844. Unpacking the P-844 1. Unpack the P-844 with care. -
Page 12: Installation
6 INSTALLATION P844M0001EN ‒ 11/13/2018 Installation Avoiding Mounting Errors Piezo actuators may only be loaded axially. The following figures intend to help you to avoid mounting errors. Figure 3: Not tightly screwed at both ends and no angles A: Wrong: Angular error at the tip B: Right: Axial loading of the actuator C: Wrong: The actuator is screwed tight at both ends Figure 4: Ball tips or flexures for decoupling lateral forces and bending forces... -
Page 13: Mounting The P-844 And Connecting To A Protective Earth Conductor
C: Wrong: Torsion due to torque Mounting the P-844 and Connecting to a Protective Earth Conductor The protective earth connection of the P-844 is established as follows: ■ Mounting hole in the base of the P-844 ■ Suitable, conductive screw ■... -
Page 14: Fixing The Load
If the protective earth conductor is missing or not properly connected, risk of dangerous touch voltages on the P-844 in the event of malfunction or failure of the system. If touch voltages exist, touching the P-844 can lead to minor injury from electric shock. -
Page 15: Connecting The P-844
6 INSTALLATION P844M0001EN ‒ 11/13/2018 Fixing the Load 1. Use an open-end wrench to hold the tip of the P-844 in place. 2. Tighten the nut to secure the load on the tip. 3. Remove the open-end wrench from the tip. -
Page 16: Startup / Operation
"Maximum Ratings" (p. 26). Peak and average output current of the electronics: electronics used (p. 10) for operating the P-844 must meet the following requirements: ■ The electronics can provide the required current. See "Calculating the Power Requirement for Sinusoidal Operation" (p. -
Page 17: Calculating The Maximum Operating Frequency Of The Loaded Piezo Actuator
7 STARTUP / OPERATION P844M0001EN ‒ 11/13/2018 3. Calculate the effective mass m of the unloaded piezo actuator and m ' of the loaded piezo actuator using the formulas in the figure above. 7.1.2 Calculating the Maximum Operating Frequency of the Loaded Piezo Actuator Information In the following calculation, the maximum permissible operating temperature of the piezo... -
Page 18: Starting And Operating The P-844
If the protective earth conductor is missing or not properly connected, risk of dangerous touch voltages on the P-844 in the event of malfunction or failure of the system. If touch voltages exist, touching the P-844 can lead to minor injury from electric shock. - Page 19 The permanent application of a high voltage to piezo actuators leads to a considerable reduction in the lifetime of the piezo ceramic. ► When the P-844 is not being used (e.g., to ensure temperature stability of the electronics), discharge (p. 20) ►...
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Page 20: Discharging The P-844
Reconnecting a charged P-844 to electronics during operation can cause a mechanical impulse that will damage the P-844. ► Do not pull the connecting cable of the P-844 out of the electronics during operation. ► If the connecting cable of the P-844 is accidentally pulled out of the electronics during operation: Switch off the electronics before you reconnect the P-844. - Page 21 P844M0001EN ‒ 11/13/2018 Discharging a P-844 not Connected to the Electronics 1. Insert the P-844's voltage connector into the switched-off electronics from PI and maintain the connection for a few seconds. M O T I O N | P O S I T I O N I N G...
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Page 22: Maintenance
✓ Auxiliary Materials Required ■ Soft, lint-free cloth ■ Mild cleaning agent or disinfectant If you have any questions on the auxiliary materials recommended for the P-844, contact our customer service department (p. 25). NOTICE Short-circuiting due to cleaning fluid penetrating the housing! Cleaning fluid penetrating the P-844’s housing can short-circuit the actuator and drive... -
Page 23: Troubleshooting
9 TROUBLESHOOTING P844M0001EN ‒ 11/13/2018 Troubleshooting No or limited motion Cable not connected correctly ► Check the cable connections. Excessive load ► Do not exceed the maximum push/pull capacity according to the specifications (p. 26). ► Contact our customer service depart‐ Piezo actuator is depolarized due to over- heating ment (p. -
Page 24: Transportation
27). 2. Pack the P-844 in the original packaging. 3. If the P-844 is to be sent, use a stable outer box. M O T I O N | P O S I T I O N I N G... -
Page 25: Customer Service Department
P844M0001EN ‒ 11/13/2018 Customer Service Department For enquiries and orders, contact your PI representative or send us an email. If you have any questions concerning your system, provide the following information: ■ Product and serial numbers of all products in the system ■... -
Page 26: Technical Data
Specifications for vacuum versions can differ. 12.2 Maximum Ratings P-844 piezo actuators are designed for the operating data specified in the table below. Additional information on the maximum ratings table ■ Maximum operating frequency without load, without considering thermal aspects,... -
Page 27: Ambient Conditions And Classifications
* The letter x in the product number of the piezo actuator stands for "4" or "5". 12.3 Ambient Conditions and Classifications The following ambient conditions and classifications for the P-844 must be observed: M O T I O N | P O S I T I O N I N G... - Page 28 12 TECHNICAL DATA P844M0001EN ‒ 11/13/2018 Area of application For indoor use only Maximum altitude 2000 m above msl Air pressure 1100 hPa to 100 hPa Relative humidity Highest relative humidity 80 % for temperatures up to 31 °C Decreasing linearly to 50 % relative humidity at 40 °C Storage temperature –20 °C to 80 °C Transport temperature...
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Page 29: Dimensions
12.4 Dimensions Figure 7: Dimensions of the P-844 Dimensions in mm. Note that the decimal places are separated by a comma in the drawings. The exact position of the wrench flats on the tip is not defined, i.e., the tip and base can be offset from each other at any angle with respect to the wrench flats. -
Page 30: Old Equipment Disposal
In order to fulfil the responsibility as the product manufacturer, PI undertakes environmentally correct disposal of all PI equipment free of charge, if it was made available to the market after August 13, 2005. Any old PI equipment can be sent free of charge to the following address: Physik Instrumente (PI) GmbH &... -
Page 31: Appendix
14 APPENDIX P844M0001EN ‒ 11/13/2018 Appendix 14.1 Pin Assignment 14.1.1 Voltage Connector Figure 8: Voltage connector: LEMO FFA.00.250.CTAC22 Signal Function Inner contact Input Piezo voltage 0 to 100 V Connector shell / Input Piezo voltage ground cable shield M O T I O N | P O S I T I O N I N G... -
Page 32: Eu Declaration Of Conformity
15 EU DECLARATION OF CONFORMITY P844M0001EN ‒ 11/13/2018 EU Declaration of Conformity An EU Declaration of Conformity was issued for the P-844 in accordance with the following European directives: ■ Low Voltage Directive ■ EMC Directive ■ RoHS Directive The standards applied for certifying conformity are listed below.
This manual is also suitable for:
P-845