LDS Laser Diffraction Sensor User's manual. … · · 2015-09-048 LDS user's manual Part IV:...

$: LDS Laser Diffraction Sensor User's manual. … · · 2015-09-048 LDS user's manual Part IV: Measures and principle Manual version : 14.0.0 Part IV: Measures and principle 1 Generalities$
CERSA-MCI53, parc Expobat13480 CABRIES

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LDSLaser Diffraction Sensor

User's manual.

Manual version : 14.0.0© 2015 CERSA-MCI

web: http://www.cersa-mci.comemail: [email protected], [email protected]

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LDS user's manual

Part I: Introduction

Manual version : 14.0.0

Part I: IntroductionThe LDS (Laser Diffraction Sensor) is specially built for dimensional measurements in wireindustry. It measures the diameter with high accuracy on 1 or 2 axes (depending on the version).Its measurement principle is based on laser diffraction. This method is position and vibrationindependent.With 2 axes, it gives well enough, an indicator of roundness in line process.The WSR (Wire Sample Rotation) and Foot Pedal accessories are reliable tools used inlaboratory to certify and qualify the production. It integrates in one single instrument the diameter,the ovality measurement as well as event management and recording.

The LDS instrument uses the latest technology to give the maximum performance.

Main AdvantagesAccurate diameter measurement.

Full ovality measurement with WSR accessory.

Vibration measurement independent.

Real time tolerances checking.

Cable position measurement.

Spool length and speed computing.

Compact and hardened industrial instrument.

Local display of measures and parameters.

CERSA-MCI develops and produces also complementary high performance measurementinstruments for wire, cable, tube industry and optical fiber production.

3Part II: Specifications


Part II: Specifications

General specifications1DIAMETER MEASUREMENT

Model : LDS200 LDS800 LDS2000

Range : 5-200 µm 18-800 µm 50-2000 µm

Uncertainty / Repeatability: 0.01 µm 0.04 µm 0.1 µm

Remark 1: Depends on standard w ire uncertainty +/- 0.03 % of the

diameter

Remark 2: Includes slow ambient temperature f luctuation w ithin 10-

40 °C. Includes w ire moves w ithin the measurement area

Number of axis : 1 or 2 (both versions are available)

Internal measurement frequency : 400 Hz (no averaging required)

Vertical measurement area : +/- 1.5 mm

Horizontal measurement area : unlimited

ANALOG OUTPUT

Quantity : 1 (for diameter control)

Type Voltage Current

Range : ±4V 0-20mA or 4-20mA

Updating frequency 400Hz

Voltage (Av) or current (Aa) option must be specified at order.

DIGITAL OUTPUTS (Open collectors)

For alarms, tolerances...(user configurable)

Quantity : 2 (or 1 if length reset input is used)

(I) option must be specified at order

DIGITAL INPUTS

For WSR, Foot pedal, length counting and length reset.

Quantity : 2

(I) option must be specified at order

DISPLAY AND KEYBOARD

Display 7 segments 4 digit LED display.

Keyboard 3 boutons keyboard for tolerance configuration and length - speed display.

(D) and (K) option must be specified.

RS232 COMMUNICATION

Used to connect the instrument to CIM softw are

Baudrate : user configurable (38400 to 115200)

Maximum cable length : 35 meters (certif ied only w ith cables supplied by CERSA)

ENVIRONMENTAL CONDITIONS:

Ambient w orking temperature : 10 - 40 °c

Maximal w orking internal temperature : 55 °c

Storage temperature : 0 - 60 °c

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LDS user's manual

Part II: Specifications


Mechanical design2LDS-1 (one axis version):

Weight: 0.9 kg

5Part II: Specifications


LDS-2 (two axes version):

Weight: 2.2 kg

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LDS user's manual

Part III: CIM software


Part III: CIM softwareC.I.M. software (CERSA Instruments Manager) is a PC environment to manage all CERSA-MCIinstruments. It provides a complete set of comprehensive tools to improve and master theproduction process as well as all features to certify the whole production specifications.Refer to CIM manual for further details.

Production environment1Main features in production :

Monitoring the process in real time.Data logging and export (database).Product definition and configuration.Production reports.Instruments configuration and maintenance.

Laboratory environment2Main features in laboratory :

Wire/cable sample dimension analysis.Statistical analysis and reports.Sample classification with customizable fieldsUser login management. Data logging into database. Instruments configuration and maintenance.

7Part III: CIM software


Chart view

Statistics

Sample 1 Sample 2

Group A Group B

Data logging and samples classification

WSR Wire sample

rotation

FP

Foot pedal

Wire sample acquisition

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LDS user's manual

Part IV: Measures and principle



Generalities1

Available measures1.1Here below is the list of measures transferred from the instrument to CIM.

Measure unit Description accesslevel

Diameter [µm] Value of the outer diameter. user

DiameterPP

[µm] Diameter peak to peak value. Gives the stability of thediameter.

supervisor

Speedmmin

[m/min.] Value of the production speed. user

Speed ms [m/s] Value of the production speed. user

Temp. [°C] Value of internal temperature of the instrument. Shouldnot exceed 55°.

supervisor

Events1.2It is a particular phenomenon that is detected by the instrument. Events are detected in real time,dated (3ms accuracy) and located (product length). Each event is also characterized by itsextremum value.

Here below is an example of high speed diameter fluctuation which exceeds the tolerances.

Here below is the list of events transferred from the instrument to CIM:

Event unit Description accesslevel

Diameter [µm] Diameter event is generated in case of out of tolerances. user

Status General status of the instrument. user

9Part IV: Measures and principle


Real time scopes1.3Because the measurement frequency of the instrument is very high, it is impossible to transfer allmeasures in real time to the computer through RS232.The instrument stores the main measures continuously in internal buffers of 500 points each .This function is called Real Time Scope.

Those buffers can be watched through CIM. Only few buffers per seconds can be watched,because of communication constraints.

The sampling period of each buffer can be modified, depending on the time scale you want toanalyse.

Those tools are very useful for process analysis to qualify the stability, the regulation performance,and display some particular effects. The F.F.T. processing shows specific oscillations. Werecommend strongly to the process engineer to use those tools for understanding andimprovement of the manufacturing process.

Diameter2

Optical principle and structure2.1Diameter measure is based on Diffraction principle.

Diffraction scope2.2This scope shows 1 signal:

CCD diffraction axis 1: Light energy vs pixel. It shows the signal acquired by the CCD.

This scope is used for maintenance purpose to check the signal quality.

Results displayed in the scope:Diameter: the diameter measure corresponding to the displayed signal.Status: the alarm code corresponding to the displayed signal.Amplitude: the fringes amplitude. The value of this parameter allows you to evaluate the goodbehavior of the measurement.

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LDS user's manual



Real time diameter scope2.3This scope shows 1 signal:

Real time diameter diffraction: Diameter vs time. It displays real time diameter fluctuations.

This scope is interesting for process study and analysis. It can show high speed phenomenon,such as diameter oscillations.

The following parameter can be adjusted:Sampling period [ms]: Represents the duration between 2 storages inside the buffer. It isused to adapt the time scale. Minimum value: 2.5ms.

11Part V: Connexions and Interfaces


Part V: Connexions and Interfaces

Rear panel1

NOT USED

SUB-D 9 CONNECTOR

NOT USED DIGITAL I/O CONNECTOR

OK = Smooth blink ALARM = Fast blink

SUB-D 9 connector2This connector integrates:

power supplyserial link (RS232)Pulse input for length counting

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LDS user's manual



DB9 Pins nb. IN/OUT Signal

1 IN Pulse input for length counting

6 Negative supply

2 do NOT connect

7 IN Positive supply

3 RS232 gnd

8 OUT RS232 TX

4 IN RS232 RX

9 Do NOT connect

5 Do NOT connect

External power supply and cable2.1The power supply inputs are floating.

Max input voltage: 36VMin input voltage: 18VReverse voltage protectedSupply current: 0.55A @ 24V



The instrument comes with its CERSA MCI’s power supply and cable. This power supply provides+24V volts rectified and filtered DC voltage with a power of 15W isolated from ground.

A short-circuit protection is included.

Input voltage : from 100V to 240V AC, 50 to 60 Hz.

Serial link2.2Communication cable should be shielded.

Communication settings:baudrate: 115200 bauds (configurable through CIM software)data bits: 8parity: evenstop bit: 1

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LDS user's manual



Length counting use2.3Opto-isolated input referenced to the negative supply (reverse voltage tolerant)Minimum voltage to ensure a high level input : 7,2VMaximum voltage to ensure a low level input : 2Vsunk current : 4,8mA @ 7,2V. Input impedance : 1200 ohms

If you connect the length counting signal and the reset signal, the instrument will compute thespeed and length with the same reference as your production system. It allows the instrument tolocate accurately all events in the spool. It can help you to determine the portion of product toreject.

The length counting interface has to be configured under CIM software (Parameters manager /Digital interface) with the following parameters:

Pulses number: The number of pulses for 1 meter length.Slip factor: in case of the real speed and the measured speed are not perfectly correlated, youcan adjust this factor. This multiplication factor is applied to the measured speed. Default value:1.0

6 pins digital I/O connector3IN/OUT connector is a circular HIROSE HR10 series 6 pins.

2 floating Inputs / outputs. The direction of each I/O (input OR output) is individually configurablethrough the CIM sofware.The instrument comes with a 5m cable, with compatible connector.

PinNumbe

r

Correspondingcolor on CERSA

cableDescription

1 White Analog output + (if Av or Aa options specified). +24V otherwise

2 Brown Analog output + (if Av or Aa options specified). 0V otherwise

3 Green digital I/O 1 +

4 Yellow digital I/O 1 -

5 Grey digital I/O 2 +

6 Pink digital I/O 2 -



Digital Input/Output3.1Outputs:

Bidirectional floating static relay : 48V / 1AThe logical state when the output is activated is configurable through the CIM software (Outputactive high or output active low)Output active high means that the internal static relay is open when the output is active.Output active low means that the internal static relay is closed when the output is active.The signal to be associated with the output pins is configurable through the CIM software

Input states:Unidirectional opto-isolated input (reverse voltage protected).Minimum input voltage (IO+ to IO-) to ensure an active input : 5,6VMaximum input voltage (IO+ to IO-) to ensure an inactive input : 3VSunk current : 2mA @ 5,6V, input impedance 2,2k_ohm

IO in OUTPUT configuration :

IO in INPUT configuration :

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LDS user's manual



Remark:Lamp, Load and Relay are shown as user application examples.

Settings:Hold Time Event IO (ms): The time in milliseconds during which the output is maintainedactivated even if the configured event has disappeared. Can be useful for "slow" PLC, to be surethat the output activation will be taken into account properly.

Signal : Events that can be attached to an IO are the following ones :

Output signals Description when activated

No signal No signal is attached to the output ; the output is maintained inactive

Position Out The object is out of the measurement area

High Diameter The object diameter is over the high tolerance of Diameter measure

Low Diameter The object diameter is lower than the low tolerance of Diametermeasure

Lump & Neck A lump or a neck has been detected accordingly to the parameters

Wrong Position The object position is not correct

Lump A lump has been detected accordingly to the parameters (necks haveno effect)

Neck A neck has been detected accordingly to the parameters (lumps haveno effect)

High - low diameter An out of tolerance on the diameter measure has been detected, eitherhigh or low.

Global Alarm An error has been detected and the instrument is not available formeasurements. That means that an error code is displayed on the localdisplay.

L&N Length A Neck sequence has been detected (either a minor or a major defect)accordingly to the parameters.

Input signals Description when activated

No signal No signal is attached to the input ; the input has no effect



Input signals Description when activated

Spool Reset Reset the spool time and spool length computed by the instrument anddisplayed under CIM to localise the events.

Digital Input/Output parameters3.1.1

Here below is the list of parameters transferred from the instrument to CIM.


Hold timeevent IO

[ms] Represents the minimum time that a digital output isactivated if the correspondig event is detected.

supervisor

IO 1configuration

Electrical configuration in input/output 1. supervisor

IO 1 signal Signal configured for input/output 1. supervisor

IO 2configuration

Electrical configuration in input/output 2. supervisor

IO 2 signal Signal configured for input/output 2. supervisor

Test digitaloutput

Test of toggling digital outputs. supervisor

Trigger mode Instrument trigger mode. For example: wire samplerotation, foot pedal.

supervisor

Wait time testoutput

[ms] Represents the waiting time that exist if the test isactivated.

supervisor

Analog Output4Floating analog output.Depending on the option chosen at the order, the output signal will be defined as a current loop oras a voltage.The associated measurement to this output is the diameter.

Specifications for current loop option :

Current range: 0-20mA or 4-20mA (CIM software configurable)Resolution: 10uAAccuracy: +/-100uAMax voltage: 15V @ 20mA, overvoltage protection @ 48VMin voltage: 3V

The current is sunk by the instrument. An external biasing is needed (the instrument interfaceis passive).

2 solutions can be used :

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LDS user's manual



Specifications for voltage output :

Voltage range: +/-4VOutput impedance: 100 to 200 ohmMax output current: 10mAResolution: 2mVAccuracy: ±50mV

Remarks:Output scales are adjustable with the following parameters under CIM software (Parametersmanager /Analog interface):

Zero point: When the measured value reaches the zero point value, the corresponding analogicaloutput is set to 0V. The unit of the zero point is the same as the corresponding measure.Scale: Is the number of volts per measure unit. For example for diameter in millimeters 2 [V/mm]:if the measure varies of 1mm the value of analog output varies of 2 Volt.Regulation: If this option is activated, then the zero point value is automatically forced to the



nominal tolerance value of the corresponding measure. Otherwise the zero point can have anyvalue.Average time: Is the average time used to compute the analog output signal.

Analog Output parameters4.1Here below is the list of parameters transferred from the instrument to CIM.


BNC 1 avg.time

[ms] Average time used to compute the analog signal inoutput 1.

supervisor

BNC 1configuration

Electrical configuration in output 1. supervisor

BNC 1measure

Measure type in output 1. supervisor

BNC 1 pos. outval.

[V orA]

In case of position out, the voltage value to apply on BNC1.

supervisor

BNC 1regulation

Force zero point value to nominal tolerance value inoutput 1.

supervisor

BNC 1 scale Number of volts per measure unit in output 1. supervisor

BNC 1 zeropoint

Measure value corresponding to 0 volts in output 1. supervisor

Force value [V ormA]

Value to force analog outputs test. supervisor

Test DAC List of analog outputs tests. supervisor

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LDS user's manual



LCD display and keyboard5At start-up, after the led display self test, the led panel displays the serial number of theinstrument.

Then, the led panel displays the measured diameter in µm.

The green "RUN" led is blinking, indicating that the instrument is measuring properly.

In case of an instrument's error, the led panel will alternately display the last measured diameterand the error code "EXXX", with XXX the corresponding error code. The red "ALARM" led will thenbe lighted.

The keyboard can be used to modify some instrument's parameters as described hereafter :

Action Led panel Display Explanation

Enter the settings menu

150.0Nominal Diameter in micrometers

Use keys to modify the value

H

1 second

10.0High Diameter tolerance in micrometers


L

1 second



10.0Low Diameter tolerance in micrometers


Prog Exit the settings menu. All the parameters are

written into the EEPROM’s instrument

Notes:

The keyboard can be inhibited through the CIM software. In that case, the settings menu is thenno more available through the keyboard.

The led display can be inhibited through the CIM software. In that case, only the error codes aredisplayed in case of errors. The measured diameter won't be displayed.

To change the values of tolerances with bigger increment keep hold buttons.

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LDS user's manual

Part VI: Instrument settings


Part VI: Instrument settingsA full set of parameters can be adjusted using CIM software.

Remark:All parameters are stored and saved in an embedded EEPROM.

Tolerances1The instrument monitors in real time if the measures are in or out of the product tolerances.In case of out of tolerance, the instrument will act as follow:

Digital output state will change. Refer to the Digital I/O chapter.Data are transferred to CIM which will show events with full details about dating, positioning andextremum values.

Here below is the logic used for tolerance control:

Measure > Nominal tolerance + Warning high tolerance EVENT WARNING HIGH (Not yetavailable)

Measure < Nominal tolerance - Warning low tolerance EVENT WARNING LOW (Not yetavailable)

Measure > Nominal tolerance + Out high tolerance EVENT OUT HIGH

Measure < Nominal tolerance - Out low tolerance EVENT OUT LOW

Here below is the full list of tolerances parameters that can be adjusted with CIM software(Parameters manager /Tolerances):

Parameter unit Description access level

Avg. time diameter [ms] Time during which the diameter will be averaged tocompute out of tolerances. (enter zero to disable)

supervisor

Hold time eventdiameter

[ms] Represents the minimum time that diameter event isactivated if detected.

supervisor

Nominal diameter [µm] Nominal diameter value. user

Out high diameter [µm] Maximum diameter tolerance. (enter zero to disable) user

Out low diameter [µm] Minimum diameter tolerance. (enter zero to disable) user

Out high temperature [°C] Maximum internal temperature of instrument. supervisor

Measure parameters2Here below is the full list of measures parameters that can be adjusted with CIMsoftware(Parameters manager /Measures):

Parameter unit Description accesslevel

Avg. time displaydiam.

[ms] Averaging time of the diameter measure shown on thelocal display and transferred to CIM.

supervisor

DiamPP cmpt.time

[s] Time interval for diameter peak to peak analysis. supervisor

Exposure timeratio

Ratio between the default exposure time (factoryconfiguration) and effective exposure time.

supervisor

Pos. out tempo [s] If the object to measure leaves the measurement area supervisor

23Part VI: Instrument settings


during this time, it is considered as position out. Allmeasures are forced to init value.

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LDS user's manual

Part VII: Installation on the line


Part VII: Installation on the line

Mounting1You must have the ability of a manual adjustment for the position of the instrument on the wireaxis.The wire should pass in the center, perpendicular to the instrument casing.

LDS-1 (one axis version):A correct adjustment is obtained when the wire is tangent with the "T bars" when they are in thehigh position.When adjusted, the "T bars" must be pushed down to avoid the wire coming into contact withthem while the machine runs.The wire can vibrate around this central position (+/-2 mm).

T bar T bar

High position

mark

Adjustment

conditions Running

conditions

Wire axis

LDS-2 (two axes version):Two guiding bars help to the mechanical alignment of the instrument on the machine. These 2guiding bars have 2 positions:

1. Retracted during production.2. Completely released for position adjustment, a correct adjustment is obtained when the wire

is tangent inside the "V" shape of the guiding bars.

25Part VII: Installation on the line


Guiding bar

Wire axis

Adjustment

conditions

Running

conditions

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LDS user's manual

Part VIII: Laboratory use



Wire laboratory support1This accessory is used to place properly the wire in the optical field in order to make singlemeasurement.

Mounting1.11. Insert the support containing the horizontal bar inside the hole of second support.2. Be careful to position the second support by keeping the curved side outwards.3. Insert the support in the LDS.

1

3

2 Flat side Curve side

27Part VIII: Laboratory use


Wire handling1.2Place the wire sample on the support and pull the two ends.The sample must be straight

Wire Sample Rotation (WSR)2For fine die and wire, we propose complementary tool in order to easily fix, tighten and rotate thewire samples at constant and adjustable tension for accurate diameter and ovality measurement.The ergonomic design is made to handle easily and quickly.We propose 2 models of WSR:

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LDS user's manual



WSR-F WSR-S

WSR-FWire sample rotation for Fine wire

WSR-SWire sample rotation Standard

Diameter range: < 100µm 50 to 450µm

Fixing method double face adhesive tape clamps

WSR-S. Spring adjustment2.1The following accessories are delivered together with your WSR-S:

6/7mm hexagonal key for spring exchange and

length adjustment

Tool for cursor removing (spring exchange)

spring #3

spring #1

6mm screw

7mm screw

The internal spring can be adjusted in order to respect the following conditions:the wire must be straight in order to obtain an accurate measurementa too high strength (traction) can elongate the sample, and then modify its diameter.

Refer to the following table for spring choice (#1, 2 or 3) and length adjustment.



The spring #2 is factory mounted.

Annealedcopper

Annealedstainless

steel

Cold drawncopper

Alloyed Cold drawnstainless

steel

Elastic resistance(daN/mm²) 7 20 30 50 80

Diameter (µm) Section(mm²)

Max strength (daN or Kg) to avoid wire elongation

20 0.0003 0.002 0.006 0.009 0.016 0.02540 0.0013 0.009 0.025 0.038 0.063 0.10160 0.0028 0.020 0.057 0.085 0.141 0.22680 0.0050 0.035 0.101 0.151 0.251 0.402100 0.0079 0.055 0.157 0.236 0.393 0.628120 0.0113 0.079 0.226 0.339 0.565 0.905140 0.0154 0.108 0.308 0.462 0.770 1.232160 0.0201 0.141 0.402 0.603 1.005 1.608180 0.0254 0.178 0.509 0.763 1.272 2.036200 0.0314 0.220 0.628 0.942 1.571 2.513220 0.038 0.266 0.760 1.140 1.901 3.041240 0.045 0.317 0.905 1.357 2.262 3.619260 0.053 0.372 1.062 1.593 2.655 4.247280 0.062 0.431 1.232 1.847 3.079 4.926300 0.071 0.495 1.414 2.121 3.534 5.655320 0.080 0.563 1.608 2.413 4.021 6.434340 0.091 0.636 1.816 2.724 4.540 7.263360 0.102 0.713 2.036 3.054 5.089 8.143380 0.113 0.794 2.268 3.402 5.671 9.073400 0.126 0.880 2.513 3.770 6.283 10.053420 0.139 0.970 2.771 4.156 6.927 11.084440 0.152 1.064 3.041 4.562 7.603 12.164

Spring # Relax length Initiallength inthe WSR

(mm)

Minimumstrength

(daN)

Minimumlength(mm)

Maximumstrength

(daN)

Strength /length

(daN/mm)

1 53 38.6 0.129 12.8 0.360 0.009

2 44.5 38.6 0.136 15.1 0.670 0.023

3 38.6 38.6 0 16.2 1.3 0.058

By rotating the 6mm screw, you can adjust the spring length, and then the strength.The spring length is readable with the cursor

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LDS user's manual



cursor moves when rotating the screw

6mm screw



WSR-S. Spring exchange2.2If you want to exchange the spring, you first have to remove the cursor:

unscrew and remove the cursor with

special tool

Then you will remove the spring by unscrewing the spring support:

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LDS user's manual



7mm screw

Unscrew and remove the spring support

Finally, you replace you spring, put back the spring support and screw it.Don't forget to put back the cursor!



WSR mounting and configuration2.3First, you must remove one optic protection to not block the WSR mounting:Warning: When removing the optic protection, take care to not hurt the opposite lens!to remove the protection, you must rotate and pull on at the same time.

Then you put the WSR inside the LDS:

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LDS user's manual



Plug I/O connector

Screw on both side to fix WSR on LDS

Configure the trigger mode to "WSR" in CIM software (Parameters manager -> Digital interface -> Digital I/O) .



WSR-S, Wire handling2.4Important: The central part of the wire must not be touched else must be cleaned, otherwisemeasurement accuracy will decrease a lot.

1

2

3 3

1: Tighten the wire with a suitable distance between your 2 hands to easily operate the clamps2: Push the right clamp in order to compress the internal spring3: Open both clamps4: Put the wire inside and release clamps

Clamp is close Clamp is open

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LDS user's manual



WSR-F, Wire handling2.5Important: The central part of the wire must not be touched else must be cleaned, otherwisemeasurement accuracy will decease a lot.

Tighten the wire with a suitable distance between your 2 hands to easily fix the wire.

1

wheel for tension adjustment Adhesive tape

The wire is fixed with double-face adhesive tape.You must twist the wire around both side support.



wire must pass inside the pulley

Then you must turn the right-side wheel in order to apply a tension on the wire.The target is to make the wire straight, but you must take care to not pull too much on it to avoidelongation (diameter reducing)

Wire sample acquisition (rotation)2.6Rotate the crank of 360deg. Total rotation time must be around 2-10 seconds.The system includes an angular encoder.Only the number of points will change according to the rotation speed.We recommend a minimum of 100 points to have measurement results independent on therotation speed.

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LDS user's manual



During the rotation, the instrument displays the angular position from 0 to 180deg

Results reading2.7At the end of the rotation, measurement results are displayed on the local display.By pushing on the red button, you switch between a mnemonic code and the measurement resultin the following way

Display example Explanation

-

40.25Average diameter

H

40.42Maximum diameter during rotation

L40.11 Minimum diameter during rotation

E0.31 Wire ovality (max - min)

P240 Number of measurement points during



rotation

We recommend to use CIM Lab software in order to benefit from data logging, and statisticsfeatures.

Foot pedal3The foot pedal is used in laboratory conditions in order to send acquisition order to the instrumentby keeping your hands free. It must be used together with the "Wire laboratory support". See wire laboratory support chapterfor more details.

Foot pedal connexion and configuration3.1

Plug I/O connector

Plug the Digital IO cable in rear panel of the instrument. Configure the trigger mode to "FOOTPEDAL" in CIM software (Parameters manager -> Digitalinterface -> Digital I/O) .

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LDS user's manual



Foot pedal acquisition and results3.2In order to have representative statistics of your wire sample:

Move and turn the wire during the acquisition.Acquire a sufficient number of points.

We describe here below the procedure for acquisition:

1. Place the wire sample on the wire laboratory support.

2. By a short press on the pedal, the LDS stores the point, and then the number of stored pointsis incremented and displayed.

Display example

1 ... 2 ... 99You can store a maximum of 99 points.

3. By a long press (3seconds) on the pedal, you close the acquisition.

Display

End

4. The statistics of acquisition are displayed with the following sequence

Display example Explanation

-



476.8 Average diameter

H

476.9 Maximum diameter.

L476.6 Minimum diameter

If you want to display it again, you just have to make a long press again.

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LDS user's manual

Part IX: Maintenance, security and troubleshooting


Part IX: Maintenance, security andtroubleshooting

Optical system cleaning1The lenses cleaning should be performed regularly depending on the environment.In most of the cases, a simple dry air blowing action each month into the lenses protection issufficient.Remember that dusts on the lenses degrade the measurement’s accuracy.

Clean with cotton and alcohol

Clean from the center to the edge

43Part IX: Maintenance, security and troubleshooting


To clean the lenses, please follow this procedure:1. Unplug the power supply.2. Remove the optic protection.3. Use dry air to eliminate the biggest particles.4. Use cotton or dry tissue with IPA (IsoPropylic Alcohol) and clean carefully each lens.5. Check visually the surface of the lenses.6. Replace the mechanical protection.

Warning: When removing the optic protection, take care to not hurt the opposite lens!to remove the protection, you must rotate and pull on at the same time.

Calibration and accuracy2

Overview2.1We describe here the way CERSA-MCI proceeds to calibrate and linearize LDS instruments inorder to benefit the maximum of their performance. It indicates also how we can certify themaximum uncertainty of the instruments.

In cooperation with fine wire specialized foreign national laboratories and university, CERSA-MCIhas developed a complete process for ultra fine wire calibration and the linearization of its LDSinstruments. We also have developed a complete test and validation procedure to certify theperformance of each instrument. That opens the way to very demanding applications like goldwires.

Partner reference laboratories2.2National laboratories:

METAS, Switzerland, Lindenweg 50, CH3003 BERN-WABERN

NIST, USA, 100 Bureau Drive, Stop 8211, GAITHERSBURG MD 20899-8211

Private laboratory:

CARY (TESA Division), Switzerland, Rue de France 55, CH2400 LE LOCLE

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Metrological certificates2.3The following certificates (available on demand) certify our “original reference wires”:

April 04th 2005: CARY certificate # 33001.05201, 33002.05201, 33003.05201, 33004.05201,33005.05201

January 19th 2006: CARY certificate # 33301.06119, 33302.06119, 33303.06119, 33304.06119,33305.06119, 33306.06119, 33307.06119, 33308.06119

February 20th 2006: CARY certificate # 33003.06151

May 11th 2007: NIST certificate # 821/274945-07

July 07th 2007: NIST certificate # 821/275229-07

October 10th 2010: METAS certificate # 111-05211

May 14th 2013: METAS certificate # 111-08151

CERSA reference LDS instruments2.4The diffraction instruments are not absolute (reference) measurement instruments. At theopposite, the CERSA-MCI instruments benefit of an exceptional repeatability and long termstability. Then, the key point is to give them measurement references at the level of theirperformance. To do that we use reference wires measured by international laboratories,compared with theoretical analysis. We proceed as follows:

1. From different high quality stainless steel wires with a very good surface quality and limitedovality we produce wires on supports from 30µm to 2mm.

2. 20 wires have been sent to the specialized reference laboratories for calibration to become our“original reference wires”. An official document keep in CERSA-MCI certifies the calibrationof these wires. The full uncertainty is given within ±0.15µm. They are kept in CERSA undersafety conditions.

3. We keep permanently swithced ON one LDS of each range (0200, 0800, 2000) named“reference instrument”. Those instrument are calibrated and linearized with the certified“original reference wires”.

4. From the “original reference wires”, we generate a regression curve, which represents theshape of the diffraction deviation, in order to minimize the uncertainties of each individual wireThis is the finest way to reference the instruments at its level of performance.



The deviation of all wires from the regression curve is within ±0.1µm and mainly ±0.05µm.The regression curve accuracy is better than the “reference wires”.

CERSA standard wires. SWB2.5

From the same source of wires, we generate pieces of wires on supports which are calibrated fromthe reference instruments. These wires are delivered to our customers by sets 4 wires in a box tocheck at the measurement stability of each instrument.

We recommend you to purchase a set of standard wires together with your LDS for periodicalchecking.

Here below are the available diameters:

Reference Wire 1 Wire 2 Wire 3 Wire 4SWB0200 30 90 140 190SWB0800 30 190 400 800

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SWB2000 90 400 1000 2000

values in µm

Customer linearization2.6The feedback shows that measure is stable year after year. There is no deviation over the time.Nevertheless, if you really need to adapt your measure to your references (kind of material: gold,copper, tungsten, etc...) please proceed to the following points:

1. Wait for the temperature stabilization for at least 1 hour.2. Be sure of the cleanness of the optical system.3. Check the diameter calibration with your reference wires (SWB). If deviation appears you need

to be sure that this deviation comes from the instrument and not from reference wires.4. Install TLBXlindiametre_lds software in your computer.5. Restart CIM software and go to Toolbox6. Launch CIM software and add your device to the connections list. Launch TLBXlindiametre

application. (Please refer to CIM manual for more details).7. Select the instrument if you have more than one device connected to CIM.

The linearization graph display the standard diameter versus the diffraction diameter in blue color.In order to underscore the non linearity of the curve the software display the difference between thestandard value and the diffraction value with red dots.In these conditions (Regression deactivated) the instrument will use linear approximation betweenpoints of this table.



Another solution consists in using an order 3 regression curve (A0 + A1 * Diameter + A2 *Diameter 2̂ + A3 * Diameter 3̂).You need more than 3 points to use this approach. Select "Regression" parameter, the computedcoefficients and the curve are displayed as follow:

You can delete points from the linearization table with Delete button. When you add à point awindow appears to enter the standard value.When you finish the acquisition click on "Transfer to instrument" in order to load parameters in theinstrument.You can save and load different calibration according to your references, materials, etc...

The maximum number of references to enter in linearization table is 20.

Standard wire coming from weightmeasurement

2.7

In case of you want to make the linearization with your own wires, in order to take in account theovality and to not be sensitive to the wire orientation, you can use WSR accessory.In this case follow this procedure:

1. initialize the table (erase all points and transfer to instrument).2. Using WSR and CIM Lab software, measure all your standard wires.3. In TLBXlindiametre_lds, edit both columns : Diffraction diameter (average result from CIM Lab)

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and Standard diameter (your own reference diameter from weight measurement)4. Transfer to instrument.

Error codes3In case of measurement problem or error, the instrument will show on the local display an errorcode "EXXX" only for the negative values of the event code following table.This code is also transferred to CIM which will display a short text. For further details about thesecodes, please refer to the following table:

Eventcodevalue

Text displayed inCIM

Description

5 OUT HIGH Tolerance current state out high

2 OUT LOW Tolerance current state out low

0 OK Tolerance current state ok

-1 COMM_ERROR Prioritary CIM information. Instrument deconnexion.Comm error.

-2 CHANGE SPOOL Indicates a spool change. Time length reset.

-3 EVENT OVF Internal event used for events management

-4 EVENT MAX Internal event used for events management

-16 RS232 ERR. Internal event used for comm management

-200 HIGH TEMP Temperature is too high

-202 UNST TEMP Temperature is not stable

-204 EEPROM Internal storage error

-209 HW VER. INC. Internal communication error

-211 CAPT_T Internal temperature sensor failure.

-212 WATCHDOG Internal software failure.

-300 POSITION OUT Fiber position is not correct

-301 WRONG POSITION Fiber position is not correct

-402 SIGNAL DIRTY Signal is not correct for analyse

-498 SIGNAL Signal is not correct for analyse

Positive event code value are not displayed on the local display"OK" event code is not displayed on the local display, and is replaced by the green led "RUN"blinking.Error codes "RESET SPOOL" and "EVENT MAX" are displayed only under CIM software.

Safety rules4There is no particular protection constraint for users in the case of a normal operation of thedevices. Nevertheless hazardous reflections can be emitted afforded by the aversion response forunaided viewing.

Laser source information:Class 2M laser device according to the classifications given by the "American National StandardsInstitute", document ANSI Z136.1-2007, page 1.

49Part X: Embedded software versions


Part X: Embedded software versionsThe following history table highlights the technical changes made to the instrument embeddedsoftware.

Embeddedversion

Date Evolution CIMcompatibilit

y

2013/07/01 2013/07/01 LS ONE version Notcompatible

V1 2014/11/30 LDS iw now compatible with CIM software CIM 6.0V4 2015/07/10 Diameter linearization with 20 points.

Diameter peak to peak computed separately by axis.New keyboard configuration.

Fix some minor bugs with CIM interface.Add exposure time ratio parameter.

CIM 6.4

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Part XI: User's manual versions


Part XI: User's manual versionsThe following history table highlights the technical changes made to the instrument user's manual.

User's manualversion

Date Evolution Embeddedsoftware

4.9 2013/07/01 Old LS ONE version 2013/07/0113.0 2014/11/30 LDS iw now compatible with CIM software V114.0 2015/07/10 Update specifications for LDS.

Update Toolbox linearization graphs andnumber of points.

Add list of parameters for analog and digitaloutputs.

V4

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