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Related Manuals for LMI Selcom SLS 5000
Summary of Contents for LMI Selcom SLS 5000
- Page 1 User’s Manual SLS 5000 SLS 6000 SLS 2401 SLS 2008...
- Page 2 Trademarks and Restrictions Selcom is a registered trademark of LMI Technologies Inc. This product is designated for use solely as a component and as such it does not comply with the standards relating to laser products specified in U.S. FDA CFR Title 21 Part 1040.
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Page 3: Table Of Contents
Table of contents INTRODUCTION TECHNICAL DESCRIPTION Identification of parts SLS5000 SLS 6000 SLS 2401 SLS 2008 Manufacturers serial number label Measurement principle and definitions Sampling frequency and bandwidth. The analog position sensitive detector Linearization TECHNICAL DATA Block diagram Dimensions Environmental conditions Power requirements Performance Sensor configuration... - Page 4 Appendix D, SLS power unit 24 Appendix E, Connection table Appendix F, Quality Record Appendix G, Dimensional drawings LMI Technologies AB LMI Technologies (USA), Inc LMI Technologies Inc. LMI Technologies BV Ögärdesvägen 19 A 21455 Melrose Ave. Suite 22 205-7088 Ventura Street...
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Page 5: Introduction
No changes or modifications may be made to the sensor or its cable unless you have a written permission from LMI Technologies. If the sensor is opened or modified without permission, warranty is voided. -
Page 6: Technical Description
2 TECHNICAL DESCRIPTION Identification of parts SLS5000 Emission indicator device 1, Illuminated when power is ON 2, Green when target is within the measurment range Manufacturers serial 3, Yellow when no target is present number label within the measurment range Laser shutter SELCOM SLS5000... -
Page 7: Sls 2401
SLS 2401 Emission indicator on 2401 head is RED when laser is ON. Function of Emission Indicator on SLS controller see previous page Figure 3. SLS 2401. SLS controller top and 2401 head bottom. SLS 2008 Emission indicator on SLS2008 sensor head is RED when laser is ON. Figure 4. -
Page 8: Manufacturers Serial Number Label
The serial number label contains the following information: 1. The address of the production location. 2. The part number of the product. Refer to this part number when contacting LMI Technologies. 3. Type description of the sensor. SLS5070/200-BM means: SLS5000... -
Page 9: Measurement Principle And Definitions
Other letter combinations may occur. 4 Serial number of the sensor. Refer to this serial number when contacting LMI Technologies. 5 Available outputs, one analog and one digital. The outputs are selected when ordering the sensor. Possible combinations are: 0-20 mA / Selcom or 4-20 mA / Selcom 0-20 mA / RS422 or 4-20 mA / RS422 RS232 is always available, ref to appendix for details. -
Page 10: Sampling Frequency And Bandwidth
The accuracy is high; the error is normally less than 0.2% of the measurement range. Sampling frequency and bandwidth. Sampling frequency and bandwidth are related but not identical quantities. The sampling frequency tells how often the sensor evaluates the raw analog signal by performing an A/D conversion. -
Page 11: Linearization
Linearization SELCOM Detector output SLS5000 Non-linearized function Desired function A small portion of the scattered light Scattered light reflection The function between the raw output from the detector and the actual distance between the SLS sensor and the measured object is non-linear. This non-linearity is mainly due to the geometry of this type of measurements and to the analog portion of the data processing. -
Page 12: Dimensions
Dimensions SLS5000 Length: 135 mm (5.3 inches) Height: 105 mm (4.1 inches) Width: 51 mm (2.0 inches) Weight: 1.1 kg (2.2 lbs) SLS6000 Length: 376 mm (14.8 inches) Height: 169 mm (6.6 inches) Width: 70 mm (2.7 inches) Weight: 4.4 kg (9.9 lbs) Environmental conditions Temperature:... -
Page 13: Sensor Configuration
Sensor configuration Measurement Range (MR), Stand Off (SO), Beam divergence angle SLS5000 MR (mm) SO (mm) Spot size at Beam Resolution SO (mm) divergence (rad) 1 LSB= (um) 0,060 1,50 0,060 5,00 0,030 2,50 0,030 5,00 0,030 8,75 0,025 8,75 0,025 17,50 0,025... -
Page 14: Sls2401
SLS2401 MR (mm) SO (mm) Spot size at Beam Resolution SO (mm) divergence (rad) 1 LSB= (um) 0,06 0,060 5,00 0,09 0,038 12,50 SLS2008 MR (mm) SO (mm) Spot size at Beam Resolution SO (mm) divergence 1 LSB= (rad) (um) 1350 0,004 81,25... -
Page 15: Digital Outputs
Td = delay time, Tc = time constant Time Error (% of step) 36 % 13 % 4 Tc External impedance = 500 ΩTd = 200 µs. Tc = 80 µs. (at 2 kHz bandwidth) External impedance = 500 Ω + filter according to appendix C. Td = 300 µs. -
Page 16: Rs422
Current: I(OH) > 40 mA I(OL) < -40 mA RS422 Full duplex Protocol: SLS-ASYNCH-1 Ref: Appendix E Invalid output 100 ohm Inv.out + Inv.out - Figure 9: Optocoupled Max ratings: V CE 35 V 50 mA Rise time 60 µs (typical): Fall time 53 µs... -
Page 17: Safety Requirement
If otherwise is not explicitly stated, always disconnect the power supply unit during installation, service and maintenance of the SLS. The power supply unit delivered from LMI Technologies is provided with a key control. Remove this key to prevent that the laser is turned on unintentionally. -
Page 18: Summary Of User Precautions Regarding Laser
Required for all operator and maintenance personnel. Emission delay LMI Technology’s sensors can be equipped with two different types of emission delay. One (called Laser ON delay) will always cause a short delay every time the laser control signal is turned on, before the laser actually starts emitting laser light. -
Page 19: Safety Of Laser Products
Safety of Laser products. Maximum Permissible Exposures (MPEs) IEC 60825-1, Safety of laser products, relies on the concept of the MPEs. The MPEs are derived primarily from animal and human data, but take into account of human variability and laser parameters Clause 3.55 of IEC 60825-1 defines the maximum permissible exposures as “The level of laser radiation to which, under normal circumstances, persons may be exposed without suffering adverse effects. -
Page 20: Calculation Of Mpe And Nohd
S ta n d O ff S ta n d O ff Irra d ia n c e o r R a d ia n t E x p o s u re e q u a ls M P E Irra d ia n c e o r R a d ia n t E x p o s u re e q u a ls M P E B e a m d iv e r g e n c e B e a m d iv e r g e n c e... -
Page 21: Warning Labels
Max average power Q-record Beam divergence angle See section “ Sensor configuration” Non Gaussian correction factor LMI use 2.5. See table above Diameter of emergent laser beam (a) 5 mm The NOHD value for each sensor can be found in the Q-record. -
Page 22: Laser Safety References
Class 3R Class 3B Example -Near Infrared laser Figure 10a: Explanatory label, (example Figure 10 b: Aperture label English) Laser Safety References 1 International Standard IEC 60825-1 (2001-08) Consolidated Edition, Safety of laser products - Part 1: Equipment classification, requirements and user's guide 2 Technical Report IEC TR 60825-10, safety of laser products- part10. -
Page 23: Installation
5 INSTALLATION Pin configuration DSUB-15 pin, pin connector CONTACT series R2.5-16 pin, pin connector ....1 Receive data, RS232-C 9 Transmit data, RS232-C 3 CLOCK, SELCOM interface or RS422 Rx+ 4 CLOCK-inv, SELCOM interface or RS422 Rx- 5 DATA, SELCOM interface or RS422 Tx+ 6 DATA-inv, SELCOM interface or RS422 Tx-... -
Page 24: Analog Output
Signal leads with demand for twisted pairs Interface Pin number RxD - GND (RS232) 1, 11 TxD - GND (RS232) 9, 11 CLOCK - CLOCK-inverse 3, 4 DATA - DATA-inverse 5, 6 Rx+ - Rx- (RS422) 3, 4 Tx+ - Tx- (RS422) 5, 6 Signal leads without demand for twisted pairs... - Page 25 given sensor measurement range the only valid scale factor figure is given in the table Analog current scale factor for SLS It is NOT CORRECT and will lead to erroneous results if the measurement range is simply divided by the current range!! If an absolute distance between the target and the sensor (or some other ref.
- Page 26 0 - 20 mA case D (mm) Far End Stand-off (SO) Close End I (mA) Compute distance D (sensor - target): D = (10 - I) * SF + SO Example: Sensor is SLS5325/400 => SF = 16,64 mm/mA, SO = 400 mm D = (10 - 13,5) * 16,64 + 400 = 341,76 mm I = 13,5 mA SO (=400mm)
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Page 27: Load Conditions For Analog Output
37,12 46,4 43,52 54,4 1000 51,2 64,0 Load conditions for analog output. The current output load resistance should not exceed 500 ohms. A return path to ground should be provided via pin 11 (GND). The total resistance in the analog out lead and the ground lead must not exceed 15 ohms. -
Page 28: Cable Crosstalk
+ 5V connector 100 ohm pin 12 I = max 50 mA Valid out LOW = Invalid pin 8 HIGH = Valid 4.7 k ohm Figure 15: Example of connection (current source): Cable crosstalk. Due to cable crosstalk the spectral characteristics of the analog current output, as measured over a 100 Ohm resistor, may have the following principal appearance: SLS5000 signal spectrum HF-noise spectrum... -
Page 29: Electrical Installations, Examples
Electrical installations, examples Below are four examples of electrical connections using the available interfaces provided by the SLS sensor: Analog output, 0-20 mA SLS5000 User end 4.7 k ohm connector Invalid out - LOW = Invalid, HIGH = Valid Invalid out + + 24 VDC Analog out 10 k ohm... - Page 30 Selcom synchronous serial interfaceRS422 interface S L S U s e r e n d c o n n e c to r R x+ T x+ R x- T x- T x+ R x+ T x- R x- G N D G N D L a s e r O N P o w e r (+ 2 4 V D C )
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Page 31: Mechanical Installation
Mechanical installation. The SLS sensor must be mounted rigidly in such a way that neither thermal expansion of the fixture nor external forces may influence its position. Otherwise the accuracy of the system will be affected and frequent re calibrations of the system may be necessary. -
Page 32: For A Single Sls Sensor System
For a single SLS sensor system The distance between the SLS sensor and the reference plane must not be changed. Target Reference Reference roller roller Figure 20: Measurement against the reference plane 1. Laser beam 2. If the incoming laser beam is not perpendicular to the measured surface, compensation for the angle may be necessary. - Page 33 1. Sensor 1 is mounted in its fixed position. Use the horizontal sprit level. Make sure that the mechanical flap in front of the laser aperture is in the closed position. Sensor 2 Start by making this plane horizontal Sensor 1 Figure 22: Illustration of how to mount the sensor 2 Sensor 2 should be loosely mounted, not fixed.
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Page 34: Hints For Measurements
not occur when using special designed sensors for semi transparent materials. 4. Remove the cover over the receiver opening. Put the piece of non-transparent material in the measurement range. Try to keep it as perpendicular to the laser beams as possible. If the sensors are correctly aligned you will note an increase of the thickness when you tilt the plate. -
Page 35: Material
2. Surface texture. 3. Temperature of the material. 4. The geometry of the material. Material 5.1.1.1 General group. Mat surfaces. There is a bulk of different materials that falls into the general group, i.e. easily measured on for the SLS sensor. Generally these materials have a mat type of surface. - Page 36 SLS sensor somewhat to get enough light in the direction of the receiving optics consult LMI Technologies. Note that some material ages optically, e.g. car paint or uncured rubber. Compare an absolutely fresh sample from the extruder measured immediately and after 15 minutes a great difference will be noticeable.
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Page 37: Unstable Thickness Reading
Unstable thickness reading 1 In the case of a dual sensor system, the sensors will receive not only reflected light but also the transmitted light from ”the opposite” SLS sensor. Since they are working at nearly the same frequency, they will interfere with each other. - Page 38 SLS5000 SLS5000 Scan Black strip/spot Position output Figure 29: Example of output from the SLS sensor Surfaces with a regular pattern from machining (e.g. rolling marks or from grinding) will cause a uniform scattered reflection. This will result as a static error that varies depending on where on the machining marks the center of gravity of the light spot is located.
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Page 39: Temperature Of The Material
Temperature of the material Due to the given specification of the SLS sensor it has a maximum temperature coefficient of 200 ppm. That is for the SLS sensor housing temperature. The temperature of the object does not affect the accuracy at all within the given specifications. -
Page 40: Service And Maintenance
The laser beam of the SLS sensor cannot burn skin. No changes or modifications may be made to the sensor or its cable unless you have a written permission from LMI Technologies. If the sensor is opened or modified without permission, warranty is voided. -
Page 41: Led-Indicators (Yellow And Green)
• Laser is ON but no object in the measurement range or • Laser is ON with an object in the measurement range Indication that the Laser is faulty, contact LMI Technologies! 5. Yellow and Green LED is blinking Faulty sensor condition, contact LMI Technologies! -
Page 42: Appendixes
Section 3 Laser safety updated section updated. Appendix sections Appendix B, Accessories LMI Technologies can supply the following accessories: • Additional cables • Heat protected cables • Air purge adapter • Power supply • Heat shield (temperatures < 750 °C) - Page 43 rate 100 Hz (RS-232, binary reply mode) 1000 Hz (RS-422) The SLS sensor always operates as a slave, i.e. it never initiates a data transfer itself. All data transfers must be requested by an external device, referred to in the rest of this document as the master.
- Page 44 distinguished by using the notation 0xXXXX, 0xYYYY etc. ASCII Commands and Replies (RS-232) Command and Reply Structure RS-232 commands and replies are structured as follows: Every command sent from the master must be preceded by a ”dollar” character ($). Every command sent from the master must be terminated by a ”greater than” character (>).
- Page 45 write data to the Flash memory. During that time, the sensor is blind and deaf to the outside world and cannot perform its normal measurement duties. Because the reason for having parameter-changing serial commands is to be able to change the sensor's behaviour on the fly, that kind of delay is unacceptable.
- Page 46 Reply: T+nn / T-nn The parameter nnnnn works the same as for the ”Distance Value” command. Examples Command: $DITV200> Reply: DnnnnVnnnInnnT+nn>DnnnnVnnnInnnT+nn> (200 repetitions) This command causes the SLS sensor to send 200 groups of values, where each group contains one distance value, one validity value, one intensity value and one temperature value.
- Page 47 that the highest legal value is 999, giving an output rate of about 0.1 Hz, or one value every 10 seconds. Synchronize (reset filter) Command: $S> Reply: S> This command causes the SLS sensor to restart its filtering cycle from scratch. It may be used to ensure that several probes are in sync with each other.
- Page 48 This command is used to enter a setup menu, where some of the SLS sensor’s internal parameters can be modified. This is an interactive menu, which demands the use of an ANSI terminal (or a PC running an ANSI terminal emulation program).
- Page 49 large amounts of data, with different types of data intermixed, may occur. Batch Commands The batch commands can be used in binary mode. If two or more commands are concatenated, the identifier bytes are ORed together in the reply to allow the master to check that the SLS sensor understood the command correctly.
- Page 50 identifier 0xEF is the inclusive OR of 0xE1 (Distance), 0xE2 (Validity), 0xE4 (Intensity) and 0xE8 (Temperature). 0x0001 is of course the data count (1), 0xXXXX is the distance value, 0xYY is the validity, 0xZZ the intensity and 0xTT the temperature. Single Commands Laser On / Off Command:...
- Page 51 Both commands and replies sent over RS-422 are binary. The command set is basically a subset of the RS-232 ASCII command set, but there is also a special command for requesting a batch of distance values with single laser intensity and probe temperature values added at the end of the batch.
- Page 52 intensity and one temperature value. Note that the reply identifier in this case is not identical to the command identifier. This is for backward compatibility reasons. A parameter value of 0x0000 cannot be used with this command and would in any case be useless (this would in effect be equivalent to the command 0xE1 0x0000).
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Page 53: Appendix D, Sls Power Unit 24
Appendix D, SLS power unit 24 The SLS Power unit 24 can supply one or two SLS sensor sensors. The customer must provide a power cable of suitable length, fitting the power receptacle. Demands on additional cables to the sensor(s) or to registration equipment according to chapter- Cable requirements. - Page 54 if power is on AND the jumper or a remote switch is closed. Two SLS sensors connectors, SLS1 and SLS2. Socket connectors for easy connection of one or two SLS sensors with DSUBmin connectors. Front view, DSUB-15 pin, socket connector SLS Powerbox 24 connectors SLS1 and SLS2 .
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Page 55: Appendix E, Connection Table
Appendix E, Connection table Cable-Terminal ends COLOUR Terminal ends SIGNAL TYPE BROWN YELLOW GREY CLK/RX+ PINK INV. CLK/RX- BLUE DATA/TX+ INV. DATA/TX- WHITE/YELLOW INV OUT + WHITE/GREEN ANALOG OUT YELLOW/BROWN LASER ON (+24 v) BROWN/GREEN INV. OUT - RED/BLUE N.C. BLACK N.C. -
Page 56: Appendix F, Quality Record
Appendix F, Quality Record The Quality Record is delivered together with every sensor from LMI Technologies. Its purpose is to present the most important data about the sensor in a compact way. More information about different aspects of the Quality Record information, such as laser safety, outputs, specifications etc. - Page 57 More information is available in the relevant manual sections. Section ”Sensor Info” Sensor type: The sensor’s official type designation. LMI Technology’s part number. Part number: Serial number: The serial number of this particular sensor. Date: The date when the Quality Record was printed.
- Page 58 Max average power: The laser in LMI Technology’s sensors is a pulsed type, i.e. it emits pulses of brief duration and is shut off in between. This number indicates the maximum laser power if the pulses are averaged over time.
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Page 59: Appendix G, Dimensional Drawings
Appendix G, Dimensional drawings 03-09-05...