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Physik Instrumente E-625 User Manual

Lvpzt controller/amplifier
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PZ167E User Manual
E-625
LVPZT Controller/Amplifier
Release: 1.4.0
Date: 2009-04-14
This document describes the
following product(s)*:
E-625.SR
LVPZT Controller/Amplifier, Single Channel, for
Strain Gauge Sensors
E-625.LR
LVPZT Controller/Amplifier , Single Channel, for
LVDT Sensors
Capacitive sensor E-625 versions are described in a
separate manual, PZ 166E. The E-625.C0 is described
in PZ187.
© Physik Instrumente (PI) GmbH & Co. KG
Auf der Römerstr. 1 ⋅ 76228 Karlsruhe, Germany
Tel. +49 721 4846-0 ⋅ Fax: +49 721 4846-299
s ⋅ www.pi.ws
info@pi.w

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  • Page 1 Strain Gauge Sensors E-625.LR LVPZT Controller/Amplifier , Single Channel, for LVDT Sensors Capacitive sensor E-625 versions are described in a separate manual, PZ 166E. The E-625.C0 is described in PZ187. © Physik Instrumente (PI) GmbH & Co. KG Auf der Römerstr. 1 ⋅ 76228 Karlsruhe, Germany Tel.
  • Page 3 Physik Instrumente (PI) GmbH & Co. KG is the owner of the following company names and trademarks: PI®, PIC®, PICMA®, PILine®, PIFOC®, PiezoWalk®, NEXACT®, NEXLINE®, NanoCube®, NanoAutomation® The following designations are protected company names or registered trademarks of third parties:...
  • Page 4 About This Document Users of This Manual This manual is designed to help the reader to install and operate the E-625 LVPZT Controller/Amplifier. It assumes that the reader has a fundamental understanding of basic servo systems, as well as motion control concepts and applicable safety procedures.

  • Page 5: Table Of Contents

    4.2.2 Open-Loop Sensor Range Adjustment ........24 4.2.3 Servo-Control Static Gain Calibration ........26 Servo-Control Dynamic Characteristics ........28 Electronics Details E-625 Block Diagram ...............29 Components and Adjustment Elements ........30 5.2.1 Jumpers..................31 5.2.2 Switches ................... 32 5.2.3 Potentiometers ................. 32 E-801 Sensor Processing Submodule ........32...
  • Page 6 Contents Troubleshooting Customer Service Old Equipment Disposal Technical Data Specifications ................40 Frequency Response Diagram..........42 Dimensions ................43 Pin Assignments ..............44 9.4.1 Network ..................44 9.4.2 Power Connector ..............44 9.4.3 Strain Gauge Sensor Wiring ............ 45 9.4.4 Linear Variable Differential Transformer (LVDT) Sensor Wiring ..................

  • Page 7: Introduction

    Networking requires additional wiring and setup. E-625s for use with capacitive sensors are described in detail in their own manual, PZ166. The E-625.C0 is the same as the E- 625.CR, except that it has the analog control interface only. It is described in User Manual PZ187.

  • Page 8: Safety Precautions

    Degree of pollution: 2 Safety Precautions DANGER High Voltage: Read This Before Operation: E-625 LVPZT Controller/Amplifiers generate voltages up to 120 V for driving LVPZTs. The output power may cause serious injury. When working with these devices or using PZT products from other manufacturers we strongly advise you to follow general accident prevention regulations.
  • Page 9 To disconnect the system from the supply voltage completely, remove the power plug from the wall socket, or remove the power supply connector from the E-625. Install the system near the AC outlet and such that the AC power plug can be reached easily.

  • Page 10: Unpacking

    Introduction CAUTION Thermally stable systems have the best performance. For a thermally stable system, switch on the E-625 at least one hour before you start working with it. CAUTION If the piezo stage starts oscillating (humming noise): In closed-loop operation, switch off the servo immediately.

  • Page 11: Additional Components

    Introduction SMB/BNC adapter cables (E-692.SMB) 1.5 m, two units User Manual for E-625 (PZ167E), this document User Manual for E-816 Computer Interface and Command Interpreter Submodule (PZ116E) User Manual for E-802 Servo-Control Submodule (PZ150E) User Manual for E-801 Sensor Excitation and Readout...

  • Page 12: Quick Start

    Install the system near the AC outlet and such that the AC power plug can be reached easily. Be sure to connect the GND stud on the E-625 rear panel to a protective ground! The E-625 comes with a 15 V wide-range-input power supply that can be used with line voltages from 100 VAC to 240 VAC at 50 or 60 Hz.

  • Page 13: First Steps

    PI (see step 4 below). To give the E-816 computer interface submodule complete control over the servo mode selection, DIP switch 3 on the E-625 front panel must be set to open- loop operation (= up). Connect the piezo stages/actuators to the proper E-625 units.
  • Page 14 Optional: If you want to work with multiple E-625s, interconnect their I C bus lines. See “Networking on I C ” on p. 18 for details Switch on the E-625 as described in “Supply Power Connection” on p. 8 Command motion of the connected piezo stage/actuator: Analog mode: Change the control input signal on “ANALOG IN/WTT”...

  • Page 15: Operation

    E-625s in precision measurement and control systems. Front and Rear Panel Elements 3.1.1 Front Panel Elements Fig. 1: E-625 Front Panel, no difference between .LR and .SR models ANALOG IN/WTT SMB coaxial, GND on outer line. Usage of this input line depends on the mode settings made with the “Settings”...
  • Page 16 PC. See the User Manual for E-816 Computer Interface and Command Interpreter Submodule (PZ116E) for more information. On Target LED, green On target signal from E-802 servo-control submodule, indicates distance from target less than ±0.19% of range. www.pi.ws E-625 PZ167E Release 1.4.0 Page 12...
  • Page 17 DIP switch 3 must be set to open-loop operation (= up). Switches 1, 2 and 4 determine the control mode (computer- controlled or analog) of the E-625 and hence the applicable control sources. See “Control Modes” on p. 15 for details Switch...

  • Page 18: Rear Panel Elements

    DC in or logic grounds. DC IN 12-30 V Socket for power supply; use Barrel-to-Switchcraft adapter (K050B0002) with C-890.PS wide-range (100-240 VAC) 15 V power supply (both included with E-625). For pinout see p. 44. www.pi.ws E-625 PZ167E Release 1.4.0 Page 14...

  • Page 19: Modes Of Operation

    Operation Modes of Operation Control modes: The E-625 can be operated in either analog mode or computer-controlled mode. The active mode determines the applicable control sources for the output voltage. See "Control Modes" below for more information. Servo modes: The current servo mode determines if the motion axis is driven in open-loop (servo OFF) or closed-loop (servo ON) operation.

  • Page 20: Servo Modes (On / Off)

    Activated with the following settings (ON position is down): 1 = OFF, 2 = ON, 4 = ON The E-816 computer interface module installed in the E-625 controls the generation of the output voltage. Target values for the axis motion can be given by move commands (received via computer interface or from a running macro), trigger input or wave table output.
  • Page 21 Operation Notes Servo-control is implemented on a small PCB submodule (E-802.55). This submodule is included with the E-625 and comes already installed. The block diagram on p. 29 answers most questions about how the various elements interact with each other.

  • Page 22: Networking On I C Bus

    Notes To give the E-816 complete control over the servo mode selection, DIP switch 3 on the E-625 front panel must be set to open-loop operation (= up). SVO? does not report the setting of DIP switch 3 for the servo mode but only the last sent SVO settings.

  • Page 23: User Electronics And Sensor Monitor Signal

    They have piggyback sub-D connectors allowing more than one cable to be plugged into a single E-625. Because of the bus capacitance limit of 400 pF, at most three such cables can be used. Fig. 3: E-665.CN networking cable For details regarding networking (e.g.
  • Page 24 Operation Fig. 4: Electronics on Sensor Monitor line with required input capacitance www.pi.ws E-625 PZ167E Release 1.4.0 Page 20...

  • Page 25: Calibration

    To do this, unscrew and remove the crosshead screws on the front and rear panel and pull off the top cover of the case. Fig. 5: E-625 with cover off www.pi.ws E-625 PZ167E Release 1.4.0...

  • Page 26: Sensor Connection And Adjustment

    Position sensors are connected to the “SENSOR” socket on the E-625 front panel, see the wiring diagrams on p. 45 and p. 45. Depending on the E-625 model you have, the submodule for either DC or AC sensor excitation is installed: The E-625.LR provides AC sensor processing: it is...

  • Page 27: Open-Loop Zero-Point Adjustment

    Set DIP switch 3 OFF. Make servo-off SVO A 0 sure that servo is not set on operation where A is the axis identifier. DIP with SVO command. switch 3 must be OFF www.pi.ws E-625 PZ167E Release 1.4.0 Page 23...

  • Page 28: Open-Loop Sensor Range Adjustment

    Open-loop sensor range adjustment requires an external measuring device with 0.1 μm resolution DANGER Procedures which require opening the case should be carried out by authorized, qualified personnel only. www.pi.ws E-625 PZ167E Release 1.4.0 Page 24...
  • Page 29 Use a series of commands like Increase analog input voltage piezo to its SVA A 90 followed by slowly nominal repeated SVR A 1 expansion as (A is the axis identifier) indicated by external gauge www.pi.ws E-625 PZ167E Release 1.4.0 Page 25...

  • Page 30: Servo-Control Static Gain Calibration

    Disconnect unit from power when opening the case, and when resetting internal switches or jumpers. When the unit must be operated with the case open, voltages of up to 120 V can be exposed. Do not touch internal conductors. www.pi.ws E-625 PZ167E Release 1.4.0 Page 26...
  • Page 31 This adjustment can only be done accurately for one control mode (analog mode or computer-controlled mode). If you use the unadjusted mode, 1% error in the sensor monitor output voltage can be expected. www.pi.ws E-625 PZ167E Release 1.4.0 Page 27...

  • Page 32: Servo-Control Dynamic Characteristics

    5%. To deactivate the notch filter and slew rate limiter, use jumper J1 in position 2-3 to remove the E-802 from the circuit entirely (see block diagram below). www.pi.ws E-625 PZ167E Release 1.4.0 Page 28...

  • Page 33: Electronics Details

    Depending on the switch settings, input signals on the analog input line will be used either as control input, or as digital input for triggering. IPin numbers 2a through 32c refer to the internal 32-pin connector and are given for informational purposes only. www.pi.ws E-625 PZ167E Release 1.4.0 Page 29...

  • Page 34: Components And Adjustment Elements

    Components and Adjustment Elements See also the E-801 and E-802 User Manuals for adjustment elements on those submodules which are not described here. Fig. 7: E-625 (viewed from component side) component locations; adjustment elements shown in default settings www.pi.ws E-625 PZ167E Release 1.4.0...

  • Page 35: Jumpers

    J1 Servo mode, notch filter and slew rate bypass 1-2: Factory setting: the servo-control mode depends on the setting of DIP switch 3 on the E-625 front panel or on the SVO command settings. The slew rate limitation and notch filter are always ON.

  • Page 36: Switches

    SGS versions have E-801.1x submodules which provide DC sensor excitation and readout. LVDT versions have E-801.2x submodules which provide AC sensor excitation. They can also be connected to SGS sensors if necessary. www.pi.ws E-625 PZ167E Release 1.4.0 Page 32...

  • Page 37: E-802 Position Servo-Control Board

    (P-I) algorithm. For calibration procedures, see "Servo-Control Static Gain Calibration", p. 26 and "Servo-Control Dynamic Characteristics", p. 28. The E-802 submodule is described in detail in a separate user manual. www.pi.ws E-625 PZ167E Release 1.4.0 Page 33...

  • Page 38: Troubleshooting

    Stage or stage cable is defective If a working stage of the same type is available, exchange the defective stage to test a new combination of E-625 and stage. Since stage and E-625 always form a calibrated system, the performance with the new stage will probably be lower than with the original stage.
  • Page 39 The high voltage output of the E-625 is deactivated If the internal temperature goes out of range (75 °C or higher), the high voltage output of the E-625 will be deactivated. In that case the mechanics will no longer move. When the internal temperature falls below 60 °C, the high voltage output...
  • Page 40 The first time you connect over the USB interface, be sure you are logged on the PC as a user having administrator rights. After the E-625 is powered on, a message will appear saying that new hardware has been detected. Follow the on-screen instructions and insert the E-816 CD.
  • Page 41 Custom software accessing PI drivers does not run. Wrong combination of driver routines/Vis Check if system runs with Terminal program. If yes read the software manual and compare sample code from the E-816 CD to check the necessary driver routines. www.pi.ws E-625 PZ167E Release 1.4.0 Page 37...

  • Page 42: Customer Service

    Product codes and serial numbers of all products in the system Current firmware version of the controller (if present) Version of drivers and / or host software (if present) Operating system on host PC (if present) www.pi.ws E-625 PZ167E Release 1.4.0 Page 38...

  • Page 43: Old Equipment Disposal

    To meet the manufacturer’s product responsibility with regard to this product, Physik Instrumente (PI) GmbH & Co. KG will ensure environmentally correct disposal of old PI equipment that was first put into circulation after 13 August 2005, free of charge.

  • Page 44: Technical Data

    60 mA Current limitation Short-circuit-proof Noise, 0 to 100 kHz 0.8 mVrms Ripple of Uout 20 mVpp at low frequencies, 40 mVpp (spikes) at 30 kHz Voltage gain 10 ±0.1 Input impedance 100 kΩ www.pi.ws E-625 PZ167E Release 1.4.0 Page 40...
  • Page 45 (10% derated over 40 °C) Overheat protection Deactivation at 75°C Dimensions 205 x 105 x 60 mm Mass 1.05 kg Operating voltage 12 to 30 V DC, stabilized (C-890.PS 15 V wide-range power supply included) Current consumption www.pi.ws E-625 PZ167E Release 1.4.0 Page 41...

  • Page 46: Frequency Response Diagram

    Technical Data Frequency Response Diagram Fig. 9: E-625 open-loop frequency response with various piezo loads. Values shown are capacitance in μF www.pi.ws E-625 PZ167E Release 1.4.0 Page 42...

  • Page 47: Dimensions

    Technical Data Dimensions Fig. 10: E-625 dimensions in mm www.pi.ws E-625 PZ167E Release 1.4.0 Page 43...

  • Page 48: Pin Assignments

    Because grounding is not assured over the power connection, the ground stud on the E-625 rear panel must be connected to a protective ground. Note that it, the metal case, and the PZT output ground are the same, but are not tied directly to the DC in or logic grounds.

  • Page 49: Strain Gauge Sensor Wiring

    LVDT transducers normally operate at 3 to 5 Vrms, at frequencies between 1 and 20 kHz, and have a typical current consumption www.pi.ws E-625 PZ167E Release 1.4.0 Page 45...
  • Page 50 Typical LVDT output sensitivity is in the range of about 100 to 250 mV/V•mm, depending on the type. LVDTs have to be used in conjunction with E-625.LR versions, which are equipped with the E-801.2x AC sensor submodules. Fig. 13: LVDT wiring diagram www.pi.ws...

  • Page 51: Appendix

    * DC-offset pot is not included or described with this product. It is deactivated by jumper **The SCL and SDA bus lines are limited to a maximum length of 1 m and a maximum capacitance of 400 pF; they appear on the “Network” connector. www.pi.ws E-625 PZ167E Release 1.4.0 Page 47...

This manual is also suitable for:

E-625.lrE-625.sr

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