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Newport LDS1000 User Manual

Controller for laser diode sensors
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LDS1000
LDS1000
Controller for Laser Diode Sensors
1.0

Introduction

2.0

Description

This manual describes the operations and conditions necessary for the
proper use and working of the NEWPORT LDS1000 Controller.
It also provides the basic maintenance operations that are useful to keep
the instrument in good working order.
NEWPORT LDS series sensors are measuring instruments that provides
results of measurements. The calibration certificate drawn up by NEW-
PORT for each delivery, or when an instrument is newly calibrated must
ALWAYS be supplied with the sensor. It provides the values of the para-
meters that must be stored in the memory of the LDS1000 electronic
controller so that the instrument gives accurate measurements. BEFORE
any measuring operation, the operator must make sure that the parame-
ters that are used by the electronic controller are the ones that the ins-
trument is designed to use. Refer to the corresponding chapter to check
and modify the sensor parameters.
You are strongly advised to read the chapter entitled "First use" careful-
ly before connecting your autocollimator.
The LDS1000 Controller is designed to drive sensors of the NEWPORT LDS
series (for example, LDS-Vector autocollimator or STR500-H rectitude sen-
sor). The latter are compact and self-contained measuring instruments.
The LDS1000 electronic controller provides the means of displaying angu-
lar variations by measuring the movement of a spot of light on a position
sensing device. It has the capacity, off-line, to store up to 2048 measu-
rements (14336 measurements with the extended memory option) and to
calculate the averages of these measurements.
When linked to a personal computer it provides the possibility of proces-
sing and recording the measurements.
This manual is designed to facilitate the use of the LDS1000 Controller for
all its modes of operation.
A second user's manual exists which describes and facilitates the use of
the sensor.
1
Controller for Laser Diode Sensors
IMPORTANT
RECOMMANDATIONS
EDH0170FE1010 – 09/98

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Summary of Contents for Newport LDS1000

  • Page 1: Introduction

    When linked to a personal computer it provides the possibility of proces- sing and recording the measurements. This manual is designed to facilitate the use of the LDS1000 Controller for all its modes of operation. A second user’s manual exists which describes and facilitates the use of the sensor.

  • Page 2: Equipment

    Modes of Operation 2.2.1 Manual Mode The LDS1000 Controller displays angular rotation values of the mirror on a frontal display screen. The operator uses the display and the active but- tons on the front panel to: • Read the measurements.

  • Page 3: Remote Mode

    2.2.2 Remote Mode When linked to a computer by RS-232-C or IEEE-488 connection, the LDS1000 Controller communicates by ASCII messages. The buttons on the front panel of the controller are no longer valid. The following functions are possible: • Reading the controller’s programmed parameters.

  • Page 4: Sensors

    LDS1000 Controller for Laser Diode Sensors 2.3.2 Sensors Autocollimator, bilingual user’s manual LDS-Vector Rectitude sensor, bilingual user’s manual STR500-H 2.3.3 Accessories and Additional Equipment Kits Calibration blade kit, with certificate LDS-CAL01 2-theta adjustable mount LDS-SL 2-theta + XY adjustable mount...

  • Page 5: Principle Of Operation

    Controller for Laser Diode Sensors Principle of Operation Laser Diode Sensors Laser diode sensors of the NEWPORT LDS series use identical technologies for the emission and reception of optical signals, but according to a diffe- rent optical diagram. The emission is performed by a Laser diode controlled and modulated at 10 kHz.

  • Page 6: Specification

    LDS1000 Controller for Laser Diode Sensors Specification The LDS1000 Controller can be used in conjunction with various optical heads.. The dependent characteristics of the optical head are given in the individual manuals. The measurement results can only take on their full meaning in relation to a unit that represents the value to be measured (distance, angle…).

  • Page 7: Environment

    The contractual characteristics are specified in the manual that goes with each sensor of the LDS series. The operating limits of the LDS1000 Controller are the following: • Operating temperature +15 °C to +25 °C • Humidity 10% to 80% •...

  • Page 8: Calibration

    A reading of the linear errors according to the angle measured is provided with each sensor. This calibration certificate gives, in particular, the value of the principal parameters to be used to configure the LDS1000 electronic controller: • S/N: Series number of the optical head.

  • Page 9: Offset Coefficient Adjustment

    The LDS1000 Controller is designed to make this correction very easily, by introducing offset coefficients into its memory. The following procedure must be accomplished: The values of offsets are reached when the instrument does not receive any light.

  • Page 10: Starting The Equipment

    Before connecting check that all equipment is switched off. CAUTION Do not use any cable other than the one supplied by NEWPORT. The cable provided connects the sensor to the electronic controller. The male part should be connected to the optical head, the female part to the controller.

  • Page 11: Power Up

    LDS1000 Controller for Laser Diode Sensors Power Up 5.3.1 Power Up Messages Link up the controller to the mains. Set the switch to “I” (IN). Once turned on, the controller goes into its initialization phase and dis- plays a welcome message.

  • Page 12: Configuring The Equipment

    Controller for Laser Diode Sensors Configuring the Equipment The controller is configured in manual mode, using the buttons and the dis- play available on the front panel of the LDS1000 Controller. This must be done before the instruments can be used. Sensor Configuration The LDS1000 electronic controller can receive a variety of sensors: an LDS- Vector electronic autocollimator or an STR500-H rectitude sensor.

  • Page 13: Ieee-488 Interface

    The parameters of the two communicating instruments must be identical to obtain the communication (in fact the two instruments must speak the same language in order to understand each other). The LDS1000 Controller is considered to be a slave in the communication protocol. Its parameters must therefore be chosen in accordance with those of the master computer.

  • Page 14: Analog Output Configuration

    LDS1000 Controller for Laser Diode Sensors Analog Output Configuration The analog outputs are only available by manual mode on the models equipped with this option. It is possible to modify the following parameters: Refer to the chapter: “Off-line use”. NOTE The analog outputs deliver two voltages that are respectively proportio- nal to the Y and Z measurements of the equipment.

  • Page 15: Off-Line Use (Manual Mode)

    LDS1000 Controller for Laser Diode Sensors Off-Line Use (Manual Mode) The LDS1000 Controller has two modes of operation. Manual mode which enables: • The configuration of the controller in accordance with the parameters of the sensor used. • To carry out measurements on values displayed.

  • Page 16: Manual Mode Functions

    LDS1000 Controller for Laser Diode Sensors The mnemonics corresponding to the function of each button are indicated by the display shown by the button. For example, in the main menu , the F5 key enables the function to be selected, and the F4 key selects the function .

  • Page 17: Measuring Functions

    LDS1000 Controller for Laser Diode Sensors MASTER RESET On switching on, if you press the F5 key for a few seconds, the controller suggests changing all the parameters to default values. Selecting (F4 key) will destroy all the data fed into the controller and will replace all values with default values.

  • Page 18: Integration Constant

    The LDS1000 Controller carries out a sliding average of N successive values, in relation to the INTG parameter that can be selected with this menu (N = 2 INTG).

  • Page 19: Maintenance Mode

    LDS1000 Controller for Laser Diode Sensors The display is in % in relation to the nominal value established at 100%. (F5) Return to main menu. 7.3.6 Maintenance Mode => (F5) => (F4) => (F2) Here the brut value of the 4 channels of the analog/digital converter from the sensor is displayed.

  • Page 20: Modification Of Current Sensor Parameters

    (F1) => (F1) Each NEWPORT sensor is delivered with a calibration certificate which enables the correct programming parameters for the LDS1000 Controller to be established. This certificate gives the values of the following parameters: S/N: Series number of the optical head.
  • Page 21 LDS1000 Controller for Laser Diode Sensors For all the parameters, a modification menu uses the following functions: (F1) Scrolling of possible parameters (or cursor movement). (F2) Lower value (-1 for digital values). (F3) Next highest value (+1 for digital values).

  • Page 22: Display Of Result In Arc-Seconds (Lds-Vector)

    LDS1000 Controller for Laser Diode Sensors 7.4.1.3 Display of Result in Arc-Seconds (LDS-Vector) => (F4) => (F1) => (F1) The calibration certificate gives the values Ycoef, Zcoef, Yincr and Zincr for result display in µrad. In general, Yincr and Zincr are equal to 1. The resolu- tion of the display is then 0.1 µrad.

  • Page 23: Visualization Of Current Sensor Parameters

    LDS1000 Controller for Laser Diode Sensors 7.4.1.5 Visualization of Current Sensor Parameters => (F4) => (F1) => (F2) You are advised to check that the current sensor really matches the sensor that is currently connected to the controller. This Visualization mode is easily accessible and provides the explicit values of the current sensor parameters.

  • Page 24: Modification Of Rs-232-C Parameters

    LDS1000 Controller for Laser Diode Sensors 7.4.2.1 Modification of RS-232-C Parameters => (F4) => (F2) The RS-232-C interface is active if the display is as follows: Otherwise, the (F1) key provides access to this menu. mode the values of the parameters stored for the RS-232-C interfa- ce can be modified.

  • Page 25: Default Values Of Communication Parameters

    The communication programs available for the LDS1000 Controller use the communication parameter default values. The LDS1000 Controller enables you to quickly return to the correct mode of operation when the parameter modifications do not allow the Interface Mode to be used normally.

  • Page 26: Modification Of Display Brightness

    The memory size depends on the option chosen at the time of ordering. It is the size of the buffer memory used for automatic acquisitions carried out by the LDS1000 Controller. This function is only accessible in Interface Mode. The values read by the sensor can be successively stored in the memory, at a high frequency.

  • Page 27: Analog Output Parameter Input

    When the analog outputs have been chosen and the controller is switched off, the controller memorizes this status. When the controller is switched on, the analog mode is reactivated. The LDS1000 Controller operates like a standard analog instrument and can be perfectly integrated into classical acquisition chains.

  • Page 28: Modification Of Analog Output Parameters

    LDS1000 Controller for Laser Diode Sensors Electric Characteristics of the Analog Outputs: • Outputs on rear panel of controller 2 connectors BNC OUTY and OUTZ • Refresh frequency 2000 Hz • Low pass digital filter 1 to 2000 Hz (depending on INTG) •...
  • Page 29 LDS1000 Controller for Laser Diode Sensors For each of the parameters, a modification menu uses the following func- tions: (F2) Lower value. (F3) Next highest value. (F5) Save and Return to analog output mode. List of parameters: Designation Available Values...

  • Page 30: Trig Input And Pwok Output

    LDS1000 Controller for Laser Diode Sensors TRIG Input and PWOK Output Conventions on Logical Inputs/Outputs The controller has a logical TRIG input available on a BNC socket on the rear panel. It provides a logical PWOK output that indicates if the sensor is receiving light.

  • Page 31: Trig Input

    LDS1000 Controller for Laser Diode Sensors TRIG Input +5 V 10 kΩ TRIG Input 100 pF • Compatible TTL input. • Max. voltage 5 V. PWOK Output 100 Ω PWOK Output • Open collector output. • Max. voltage 30 V.

  • Page 32: Use With A Computer Interface

    TRIG signal. • Reading the sensor status and the I/O available. The LDS1000 Controller is delivered with an RS-232-C cable. It will work for example with an IBM PC compatible computer with the following minimum configuration: •...

  • Page 33: Ieee-488 Interface

    : CR • WORD LENGTH : 8 • STOP BITS • PARITY : NONE Start up the LDS1000 Controller and check, in Manual mode, the interface parameters by selecting the RS-232-C protocol. => (F4) => (F2) If the display is:...

  • Page 34: Lds-Tools Software

    LDS1000 Controller for Laser Diode Sensors Start up the LDS1000 Controller and check, in manual mode, the interface parameters by selecting the IEEE-488 protocol. => (F4) => (F2) If the display is: The IEEE-488 interface is active. (Otherwise press the...

  • Page 35: Programming

    This software enables you to quickly master the instrument in Interface Mode. You are able to promptly check if the communication is working cor- rectly. It is a base for learning the basic functions of the LDS1000 Controller. Finally, it is used as a communication basis with LDS sensors for a substantial number of applications.

  • Page 36: Structure Of Messages To The Controller

    • The initialization of the interface is properly carried out. The reading sub-program should then be tested using, for example, the VE command which requests the software version of the LDS1000 Controller. The response must be an ACSII chain of type: VE LDS1000 CONTROLLER VERSION 3.0...

  • Page 37: Programming Conventions

    TB command (Reading the error). The list of commands recognized by the LDS1000 Controller are given later in this manual. You are advised to read the description of a command care- fully before using it.

  • Page 38: List Of Commands

    LDS1000 Controller for Laser Diode Sensors 10.4 List of Commands 10.4.1 Commands Listed by Category 10.4.1.1 System Management Command Description Set Manual mode. Set Interface Mode. Frozen display. Active display. Reset system. Read error. Read error code. Read operational status.

  • Page 39: Commands Listed In Alphabetic Order

    Description of Commands The rest of the manual presents the commands recognized in Interface Mode by the LDS1000 Controller. The format of one page per command is used to make it easier to look for the correct syntax. The commands are listed in alphabetic order.

  • Page 40: Ki Define The Integration Constant

    LDS1000 Controller for Laser Diode Sensors 10.5.01 Define the Integration Constant Syntax KInn Parameter 0; 1; 2; 5; 10; 20; 50; 100; 200; 500; 1000. Integration constant in msec with 0 = no integration => 0.5 msec). Possible error nn other than list below: nn takes nearest value.

  • Page 41: Ml Return To Local Mode

    LDS1000 Controller for Laser Diode Sensors 10.5.02 Return to Local Mode Syntax Parameter None. Description End of remote mode and return to manual mode. Response None. Error Execution not allowed. Example | Return to manual mode. NOTES When returning from Interface Mode to Manual mode, the display returns to the Main menu, the keys on the front panel are active again, and the integration constant keeps the value possibly programmed by KI.

  • Page 42: Mr Set Interface Mode

    Set Interface Mode from Manual mode (manual mode in main menu). Response None. Error Execution not allowed. Example | Set Interface Mode. REMARQUE The controller then displays LDS1000 REMOTE MODE. Related commands Set manual mode. Frozen display. Active display. Read error. Read error code. EDH0170FE1010 – 09/98...

  • Page 43: Ms Read Acquisition Status

    LDS1000 Controller for Laser Diode Sensors 10.5.04 Read Acquisition Status Syntax Parameter None. Description Read acquisition status. The return value is an ASCII character the code of which should be translated into binary. • Bit 0 = 0 : Correct power received.

  • Page 44: Rb Read Trigg Input Status

    LDS1000 Controller for Laser Diode Sensors 10.5.05 Read TRIGG Input Status Syntax Parameter None. Description Read the status of the TRIGG input. The return value will be equal to 0 or 1 depending on whether the interface is in high status or low status.

  • Page 45: Re Set Active Display Mode

    NOTE The PWOK output is in status 1 if the sensor receives a sufficient quanti- ty of light to carry out the measurement. This logical output is available on the rear panel of the LDS1000 Controller. Related commands Read error.

  • Page 46: Rs Reset System

    LDS1000 Controller for Laser Diode Sensors 10.5.09 Reset System Syntax Parameter None. Description Stop work in progress and carry out a RESET on the LDS1000 electronic controller. Response None. Error Execution not allowed. Example | Reset system. Related commands Read error.

  • Page 47: St Stop Work In Progress

    LDS1000 Controller for Laser Diode Sensors 10.5.11 Stop Work in Progress Syntax Parameter None. Description Stop work in progress (acquisition launched by TK, TM or TQ). Response None. Error Execution not allowed. Example | Stop the work in progress and carry on.

  • Page 48: Ta Query Sensor Parameters

    LDS1000 Controller for Laser Diode Sensors 10.5.12 Query Sensor Parameters Syntax xxTA Parameter Axis number: 1 for Y and 2 for Z. Possible errors xx ≠ 1 and xx ≠ 2 Error B. Description Read parameters of a current sensor axis: TYPE : RT or TR.

  • Page 49: Te Read Error Code

    Syntax Parameter None. Description Read last error code generated by the LDS1000 Controller: ASCII character stored in error register. The error register is reset when read with TB or TE. Only the last error encountered can be read again. Response TEaa aa = Current Error Code.

  • Page 50: Tk Acquisition On External Trigger

    21 to 100 come after it. NOTE The trigger signal is an external logical signal, that must be connected to the TRIG input located on the rear panel of the LDS1000 Controller. Related commands Define the integration constant. Read error.

  • Page 51: Tm Immediate Acquisition

    LDS1000 Controller for Laser Diode Sensors 10.5.16 Immediate Acquisition Syntax TMnn Parameter 1 at NBMAX. Number of measurements to be performed (NBMAX = Max. number of measurements related to the memo- ry installed). Error possible nn outside authorized interval Error C...

  • Page 52: Tp Read Current Position

    LDS1000 Controller for Laser Diode Sensors 10.5.18 Read Current Position Syntax xxTP Parameter Number of axis to be read (xx = 1 for Y and xx = 2 for Z). xx missing or xx ≠ 1 and xx ≠ 2 Read two axes.

  • Page 53: Ts Read Operational Status

    LDS1000 Controller for Laser Diode Sensors Related commands Define the integration constant. Read error. Read error code. Acquisitions with trigger on TRIGG input. Read number of measurements in the memory. 10.5.20 Read Operational Status Syntax Parameter None. Description Read acquisition status. The return value is an ASCII character the code of which should be translated into binary: •...

  • Page 54: Tt Read Measurements Saved

    LDS1000 Controller for Laser Diode Sensors 10.5.21 Read Measurements Saved Syntax xxTT Parameter Number of the acquisition to be proof read. xx = 0 to MAX (MAX = value returned by XN). Possible error xx missing xx = 0. xx outside authorized interval Error C.

  • Page 55: Ve Read Internal Program Version

    10.5.22 Read Internal Program Version Syntax Parameter None. Description Read internal program version of the controller. Response VE LDS1000 Controller Version xx.yy xx = Version. yy = Progress index. Errors Execution not allowed. Communication time-out. Example | Read program version.

  • Page 56: Xn Read Number Of Stored Measurements

    LDS1000 Controller for Laser Diode Sensors 10.5.24 Read Number of Stored Measurements Syntax Parameter None. Description Read number of measurements available in the memory. Response XNnn The memory contains nn measurements. Errors Execution not allowed. Communication time-out. Example | Read number of available measurements.

  • Page 57: Error Messages

    Examples of Programs (Quick Basic by Microsoft) 10.8.1 Example with RS-232-C Interface The RS-232-C interface is used to connect the LDS1000 Controller to a com- puter or a console. The controller manages the RS-232-C interface like a three-wire interface: only the send and receive lines are used as well as the mass.

  • Page 58: Example With Ieee-488 Interface

    LDS1000 Controller for Laser Diode Sensors The example program “LDSRS1” is an example of programming in Quick basic Microsoft. It demonstrates how to: • Open the interface with the appropriate parameters. • Set the controller to remote mode. • Send a command and wait for the response.

  • Page 59: Maintenance

    “Warnings”. The LDS1000 electronic controller is designed to receive signals from an LDS series sensor The following precaution are necessary if it is to work correctly: •...

  • Page 60: Cables

    LDS1000 Controller for Laser Diode Sensors 11.3 Cables Y & Z Sensor IEEE-488 Outputs Connector TRIG PWOK RS-232-C Input Output 11.3.1 RS-232-C Cables WARNING Use a standard commercial cable, or the cable supplied with the DLS1000 Controller (sheathed cable that is <3 meters in length).

  • Page 61: Sensor Interface Cable

    LDS1000 Controller for Laser Diode Sensors 11.3.3 Sensor Interface Cable: “SENSOR” Connector WARNING Use the cable supplied with the NEWPORT sensor. Channel 1 direction + and - Ø analog Channel 2 direction + and - -TOK (Security Laser) +12 V...

  • Page 62: Appendices

    LDS1000 Controller for Laser Diode Sensors Appendices Example of Program Using RS-232-C Link 'LDS1000 EXAMPLE SOFTWARE, Microsoft Quick Basic V4.5 'initialisations RS-232 COM 1 with standard parameters CHAINE$ = "COM1:9600,N,8,1,CS,DS,CD,OP3000" OPEN CHAINE$ FOR RANDOM AS #1 'LDS1000 in remode remote ev$ = "MR"...

  • Page 63: Ieee-488 Link Characteristics

    NOTE Comply to IEEE Standard Digital Interface for Programmable Instrumentation. ANSI/IEEE Std. 488 - 1978. This norm is commonly called IEEE-488. IEEE-488 Functions Supported by LDS1000 Controller Mnemonic Definition Support Attention Device Clear...

  • Page 64: Ieee-488 Function Subsets

    SR1 (Service Request). The LDS1000 asserts SRQ (Serial Request) line to notify the CIC ( controller In Charge ) when it requires service. RL0 (Remote / Local). The LDS1000 does not support the GTL (Go To Local) and LLO (Local Lock Out) functions.
  • Page 65 The LDS1000 Controller is an IEEE-488 device in which the SRQ is always enable. It will respond accordingly to the National Instruments example. When the queried data will be ready, the LDS1000 will assert the SRQ line and, in the serial poll response bit 6 will be set (Requesting service) and bit 7 (manufacturer-defined) will be set (Message Availiable).
  • Page 66 LDS1000 Controller for Laser Diode Sensors EDH0170FE1010 – 09/98...

  • Page 67: Service Form

    LDS1000 Controller for Laser Diode Sensors Service form Newport Tel. (33) 1.60.91.68.68 Fax (33) 1.60.91.68.69 (Evry – France) Name Return authorization # (Please obtain prior to return of item) Company Adress Date Country Phone number P.O. number Fax number Item(s) being returned...
  • Page 68 LDS1000 Controller for Laser Diode Sensors EDH0170FE1010 – 09/98...
  • Page 69 LDS series Laser Diode Sensor supplied by NEWPORT. The equipment composed of the sensor, the connection cable and the LDS1000 electronic controller, identified with the “ ” mark, meets all the necessary requirements of: • The European Directive 89/336/EEC, concerning Electro- Magnetic Compatibility.
  • Page 70 LDS1000 Controller for Laser Diode Sensors ’ ANUAL...
  • Page 71 This warranty is in lieu of all other warranty, expressed or implied, inclu- ding any implied commercial warranty or concerning fitness for a particu- lar use. NEWPORT shall not be liable for any indirect, special or conse- quential damage. No part of this manual shall be reproduced or copied without NEWPORT’s prior, written agreement.

  • Page 72: Table Of Contents

    3.1 Laser Diode Sensors .................5 3.2 Electronic Controller ................5 — Specification ................6 4.1 General Characteristics................6 LDS-Vector Optical Head (example of Sensor)........6 LDS1000 Controller ...................6 Measurements ...................6 Environment ....................7 RS-232-C and IEEE-488 Interfaces ............7 Analog Outputs..................7 4.2 Validity of Specifications................7 Calibration....................8 4.3 Noise Reduction ..................8...
  • Page 73 Communication Parameter Input............23 Modification of RS-232-C Parameters.........24 Modification of IEEE-488 Parameters.........24 Default Values of Communication Parameters......25 LDS1000 Controller Parameter Input............25 Reading the Internal Software Version........25 Modification of Display Brightness..........26 Reading the Size of the Memory Installed.........26 Reading the Analog Output Option..........26 —...
  • Page 74 Example with RS-232-C Interface ............57 Example with IEEE-488 Interface ............58 11.0 — Maintenance ................59 11.1 Optical Head ....................59 11.2 Maintenance of the LDS1000 Electronic Controller......59 11.3 Cables .......................60 RS-232-C Cables ..................60 IEEE-488 Cable ..................60 Sensor Interface Cable................61 Analog Output Cables................61 Measurement Synchronization Input Cable ........61...
  • Page 75 NEWPORT shall not be liable for any damage caused by: • Modification of the product. • Connecting the sensor to the LDS1000 Controller with a modified cable, or one not supplied by us. • Connection to additional equipment that does not comply with EC standards.
  • Page 76 CAUTIONS AND RESPECT THE WARNINGS THAT APPEAR LATER IN THIS MANUAL. WARNING: GROUNDING LDS1000 is a PIECE OF EQUIPMENT DESIGNED TO BE CONNECTED BY A NON INDUSTRIAL PLUG: • User safety is ensured by grounding the equipment. • The user must check the conformity of his electrical installation •...
  • Page 77 • If the equipment has fallen or if the unit is damaged. • If you think that the equipment requires servicing or repairing. • When you clean the unit. NEWPORT SHALL NOT BE HELD LIABLE IF THE ABOVE-MENTIONED WARNINGS ARE NOT RESPECTED. viii...

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