LDS Laser Diffraction Sensor User`s manual. - CERSA-MCI

LDS Laser Diffraction Sensor User`s manual. - CERSA-MCI
LDS
Laser Diffraction Sensor
User's manual.
Manual version : 14.0.0
© 2015 CERSA-MCI
CERSA-MCI
53, parc Expobat
13480 CABRIES
FRANCE
tel: +33 (0)4 42 02 60 44
fax: +33 (0)4 42 02 79 79
web: http://www.cersa-mci.com
email: sale@cersa-mci.com, support@cersa-mci.com
2
Part I: Introduction
Part I: Introduction
The LDS (Laser Diffraction Sensor) is specially built for dimensional measurements in wire
industry. 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 vibration
independent.
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 in
laboratory 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 Advantages
Accurate 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 measurement
instruments for wire, cable, tube industry and optical fiber production.
LDS user's manual
Manual version : 14.0.0
3
Part II: Specifications
Part II: Specifications
1 General specifications
DIAMETER MEASUREMENT
Model :
Range :
Uncertainty / Repeatability:
Number of axis :
Internal measurement frequency :
Vertical measurement area :
Horizontal measurement area :
LDS200
LDS800
LDS2000
5-200 µm
18-800 µm
50-2000 µm
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 fluctuation w ithin 1040 °C. Includes w ire moves w ithin the measurement area
1 or 2 (both versions are available)
400 Hz (no averaging required)
+/- 1.5 m m
unlim ited
ANALOG OUTPUT
Quantity :
1 (for diameter control)
Type
Voltage
Range :
±4V
Updating frequency
400Hz
Voltage (Av) or current (Aa) option must be specified at order.
Current
0-20mA or 4-20mA
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 (certified only w ith cables supplied by CERSA)
ENVIRONMENTAL CONDITIONS:
Ambient w orking temperature :
Maximal w orking internal temperature :
Storage temperature :
10 - 40 °c
55 °c
0 - 60 °c
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Part II: Specifications
2 Mechanical design
LDS-1 (one axis version):
Weight:
LDS user's manual
0.9 kg
Manual version : 14.0.0
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Part II: Specifications
LDS-2 (two axes version):
Weight:
2.2 kg
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Part III: CIM software
Part III: CIM software
C.I.M. software (CERSA Instruments Manager) is a PC environment to manage all CERSA-MCI
instruments. It provides a complete set of comprehensive tools to improve and master the
production process as well as all features to certify the whole production specifications.
Refer to CIM manual for further details.
1 Production environment
Main features in production :
Monitoring the process in real time.
Data logging and export (database).
Product definition and configuration.
Production reports.
Instruments configuration and maintenance.
2 Laboratory environment
Main features in laboratory :
Wire/cable sample dimension analysis.
Statistical analysis and reports.
Sample classification with customizable fields
User login management.
Data logging into database.
Instruments configuration and maintenance.
LDS user's manual
Manual version : 14.0.0
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Part III: CIM software
Wire sample acquisition
WSR
Wire sample
rotation
FP
Foot pedal
Chart view
Statistics
Sample 1
Sample 2
Data logging and
samples classification
Group A
Manual version : 14.0.0
Group B
8
Part IV: Measures and principle
Part IV: Measures and principle
1 Generalities
1.1 Available measures
Here below is the list of measures transferred from the instrument to CIM.
Measure
unit
Description
access
level
Diameter
[µm]
Value of the outer diameter.
user
Diameter
[µm]
Diameter peak to peak value. Gives the stability of the supervisor
PP
diameter.
Speed [m/min.]
Value of the production speed.
user
mmin
Speed ms [m/s]
Value of the production speed.
user
Temp.
[°C] Value of internal temperature of the instrument. Should supervisor
not exceed 55°.
1.2 Events
It 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 its
extremum 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
Diameter
Status
LDS user's manual
[µm]
access
level
Diameter event is generated in case of out of tolerances.
General status of the instrument.
user
user
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Part IV: Measures and principle
1.3 Real time scopes
Because the measurement frequency of the instrument is very high, it is impossible to transfer all
measures 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 to
analyse.
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. We
recommend strongly to the process engineer to use those tools for understanding and
improvement of the manufacturing process.
2 Diameter
2.1 Optical principle and structure
Diameter measure is based on Diffraction principle.
2.2 Diffraction scope
This 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 good
behavior of the measurement.
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Part IV: Measures and principle
2.3 Real time diameter scope
This 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 is
used to adapt the time scale. Minimum value: 2.5ms.
LDS user's manual
Manual version : 14.0.0
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Part V: Connexions and Interfaces
Part V: Connexions and Interfaces
1 Rear panel
OK = Smooth blink
ALARM = Fast blink
NOT USED
SUB-D 9
CONNECTOR
DIGITAL I/O
CONNECTOR
NOT USED
2 SUB-D 9 connector
This connector integrates:
power supply
serial link (RS232)
Pulse input for length counting
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Part V: Connexions and Interfaces
DB9 Pins nb.
1
IN/OUT
Signal
IN
Pulse input for length counting
6
Negative supply
2
7
do NOT connect
IN
3
8
4
9
Positive supply
RS232 gnd
OUT
RS232 TX
IN
RS232 RX
Do NOT connect
5
Do NOT connect
2.1 External power supply and cable
The power supply inputs are floating.
Max input voltage:
36V
Min input voltage:
18V
Reverse voltage protected
Supply current:
0.55A @ 24V
LDS user's manual
Manual version : 14.0.0
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Part V: Connexions and Interfaces
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.
2.2 Serial link
Communication cable should be shielded.
Communication settings:
baudrate: 115200 bauds (configurable through CIM software)
data bits: 8
parity: even
stop bit: 1
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Part V: Connexions and Interfaces
2.3 Length counting use
Opto-isolated input referenced to the negative supply (reverse voltage tolerant)
Minimum voltage to ensure a high level input : 7,2V
Maximum voltage to ensure a low level input : 2V
sunk current : 4,8mA @ 7,2V. Input impedance : 1200 ohms
If you connect the length counting signal and the reset signal, the instrument will compute the
speed and length with the same reference as your production system. It allows the instrument to
locate accurately all events in the spool. It can help you to determine the portion of product to
reject.
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, you
can adjust this factor. This multiplication factor is applied to the measured speed. Default value:
1.0
3 6 pins digital I/O connector
IN/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 configurable
through the CIM sofware.
The instrument comes with a 5m cable, with compatible connector.
Corresponding
Pin color on CERSA
Numbe
cable
r
Description
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 -
LDS user's manual
Manual version : 14.0.0
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Part V: Connexions and Interfaces
3.1 Digital Input/Output
Outputs:
Bidirectional floating static relay : 48V / 1A
The logical state when the output is activated is configurable through the CIM software (Output
active 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 : 5,6V
Maximum input voltage (IO+ to IO-) to ensure an inactive input : 3V
Sunk current : 2mA @ 5,6V, input impedance 2,2k_ohm
IO in OUTPUT configuration :
IO in INPUT configuration :
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Part V: Connexions and Interfaces
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 maintained
activated even if the configured event has disappeared. Can be useful for "slow" PLC, to be sure
that 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
Position Out
High Diameter
Low Diameter
Lump & Neck
Wrong Position
Lump
Neck
High - low diameter
Global Alarm
L&N Length
Input signals
No signal
LDS user's manual
No signal is attached to the output ; the output is maintained inactive
The object is out of the measurement area
The object diameter is over the high tolerance of Diameter measure
The object diameter is lower than the low tolerance of Diameter
measure
A lump or a neck has been detected accordingly to the parameters
The object position is not correct
A lump has been detected accordingly to the parameters (necks have
no effect)
A neck has been detected accordingly to the parameters (lumps have
no effect)
An out of tolerance on the diameter measure has been detected, either
high or low.
An error has been detected and the instrument is not available for
measurements. That means that an error code is displayed on the local
display.
A Neck sequence has been detected (either a minor or a major defect)
accordingly to the parameters.
Description when activated
No signal is attached to the input ; the input has no effect
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Part V: Connexions and Interfaces
Input signals
Description when activated
Spool Reset
Reset the spool time and spool length computed by the instrument and
displayed under CIM to localise the events.
3.1.1
Digital Input/Output parameters
Here below is the list of parameters transferred from the instrument to CIM.
Measure
unit
Hold time [ms]
event IO
IO 1
configuration
IO 1 signal
IO 2
configuration
IO 2 signal
Test digital
output
Trigger mode
Wait time test [ms]
output
Description
access
level
Represents the minimum time that a digital output is
activated if the correspondig event is detected.
Electrical configuration in input/output 1.
supervisor
Signal configured for input/output 1.
Electrical configuration in input/output 2.
supervisor
supervisor
Signal configured for input/output 2.
Test of toggling digital outputs.
supervisor
supervisor
Instrument trigger mode. For example: wire sample
rotation, foot pedal.
Represents the waiting time that exist if the test is
activated.
supervisor
supervisor
supervisor
4 Analog Output
Floating analog output.
Depending on the option chosen at the order, the output signal will be defined as a current loop or
as a voltage.
The associated measurement to this output is the diameter.
Specifications for current loop option :
Current range:
Resolution:
Accuracy:
Max voltage:
Min voltage:
0-20mA or 4-20mA (CIM software configurable)
10uA
+/-100uA
15V @ 20mA, overvoltage protection @ 48V
3V
The current is sunk by the instrument. An external biasing is needed (the instrument interface
is passive).
2 solutions can be used :
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Part V: Connexions and Interfaces
Specifications for voltage output :
Voltage range:
Output impedance:
Max output current:
Resolution:
Accuracy:
+/-4V
100 to 200 ohm
10mA
2mV
±50mV
Remarks:
Output scales are adjustable with the following parameters under CIM software (Parameters
manager /Analog interface):
Zero point: When the measured value reaches the zero point value, the corresponding analogical
output 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
LDS user's manual
Manual version : 14.0.0
19
Part V: Connexions and Interfaces
nominal tolerance value of the corresponding measure. Otherwise the zero point can have any
value.
Average time: Is the average time used to compute the analog output signal.
4.1 Analog Output parameters
Here below is the list of parameters transferred from the instrument to CIM.
Measure
unit
Description
access
level
BNC 1 avg.
time
BNC 1
configuration
BNC 1
measure
BNC 1 pos. out
val.
BNC 1
regulation
BNC 1 scale
BNC 1 zero
point
Force value
[ms]
Average time used to compute the analog signal in
output 1.
Electrical configuration in output 1.
supervisor
Measure type in output 1.
supervisor
Test DAC
supervisor
[V or In case of position out, the voltage value to apply on BNC
A]
1.
Force zero point value to nominal tolerance value in
output 1.
Number of volts per measure unit in output 1.
Measure value corresponding to 0 volts in output 1.
supervisor
[V or
mA]
Value to force analog outputs test.
supervisor
List of analog outputs tests.
supervisor
supervisor
supervisor
supervisor
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Part V: Connexions and Interfaces
5 LCD display and keyboard
At start-up, after the led display self test, the led panel displays the serial number of the
instrument.
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 diameter
and the error code "EXXX", with XXX the corresponding error code. The red "ALARM" led will then
be lighted.
The keyboard can be used to modify some instrument's parameters as described hereafter :
Action
Led panel
Display
Explanation
Enter the settings menu
Nominal Diameter in micrometers
150.0
Use
keys to modify the value
H
1 second
High Diameter tolerance in micrometers
10.0
Use
keys to modify the value
L
1 second
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Part V: Connexions and Interfaces
Low Diameter tolerance in micrometers
10.0
Prog
Use
keys to modify the value
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 then
no more available through the keyboard.
The led display can be inhibited through the CIM software. In that case, only the error codes are
displayed 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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Part VI: Instrument settings
Part VI: Instrument settings
A full set of parameters can be adjusted using CIM software.
Remark:
All parameters are stored and saved in an embedded EEPROM.
1 Tolerances
The 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 and
extremum values.
Here below is the logic used for tolerance control:
Measure > Nominal tolerance + Warning high tolerance
Measure < Nominal tolerance - Warning low tolerance
Measure > Nominal tolerance + Out high tolerance
Measure < Nominal tolerance - Out low tolerance
EVENT WARNING HIGH (Not yet
available)
EVENT WARNING LOW (Not yet
available)
EVENT OUT HIGH
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]
Hold time event
diameter
Nominal diameter
Out high diameter
Out low diameter
Out high temperature
[ms]
[µm]
[µm]
[µm]
[°C]
Time during which the diameter will be averaged to
compute out of tolerances. (enter zero to disable)
Represents the minimum time that diameter event is
activated if detected.
Nominal diameter value.
Maximum diameter tolerance. (enter zero to disable)
Minimum diameter tolerance. (enter zero to disable)
Maximum internal temperature of instrument.
supervisor
supervisor
user
user
user
supervisor
2 Measure parameters
Here below is the full list of measures parameters that can be adjusted with CIM
software(Parameters manager /Measures):
Parameter
unit
Description
Avg. time display
diam.
DiamPP cmpt.
time
Exposure time
ratio
Pos. out tempo
[ms]
[s]
Averaging time of the diameter measure shown on the
local display and transferred to CIM.
Time interval for diameter peak to peak analysis.
[s]
Ratio between the default exposure time (factory
configuration) and effective exposure time.
If the object to measure leaves the measurement area
LDS user's manual
access
level
supervisor
supervisor
supervisor
supervisor
Manual version : 14.0.0
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Part VI: Instrument settings
during this time, it is considered as position out. All
measures are forced to init value.
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Part VII: Installation on the line
Part VII: Installation on the line
1 Mounting
You must have the ability of a manual adjustment for the position of the instrument on the wire
axis.
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 the
high position.
When adjusted, the "T bars" must be pushed down to avoid the wire coming into contact with
them while the machine runs.
The wire can vibrate around this central position (+/-2 mm).
Wire axis
High position
mark
Adjustment
conditions
Running
conditions
T bar
LDS-2 (two axes version):
Two guiding bars help to the mechanical alignment of the instrument on the machine. These 2
guiding 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.
LDS user's manual
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Part VII: Installation on the line
Guiding bar
Adjustment
conditions
Running
conditions
Wire axis
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Part VIII: Laboratory use
Part VIII: Laboratory use
1 Wire laboratory support
This accessory is used to place properly the wire in the optical field in order to make single
measurement.
1.1 Mounting
1. 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
Flat side
LDS user's manual
2
Curve side
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Part VIII: Laboratory use
1.2 Wire handling
Place the wire sample on the support and pull the two ends.
The sample must be straight
2 Wire Sample Rotation (WSR)
For fine die and wire, we propose complementary tool in order to easily fix, tighten and rotate the
wire 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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Part VIII: Laboratory use
WSR-F
WSR-S
Diameter range:
WSR-F
Wire sample rotation for Fine wire
< 100µm
WSR-S
Wire sample rotation Standard
50 to 450µm
Fixing method
double face adhesive tape
clamps
2.1 WSR-S. Spring adjustment
The following accessories are delivered together with your WSR-S:
6mm screw
6/7mm hexagonal key
for spring exchange and
length adjustment
7mm screw
Tool for cursor removing
(spring exchange)
spring #3
spring #1
The internal spring can be adjusted in order to respect the following conditions:
the wire must be straight in order to obtain an accurate measurement
a 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.
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Part VIII: Laboratory use
The spring #2 is factory mounted.
Annealed
copper
Elastic resistance(daN/mm²)
20
40
60
80
100
120
140
160
180
200
220
240
260
280
300
320
340
360
380
400
420
440
Section
(mm²)
0.0003
0.0013
0.0028
0.0050
0.0079
0.0113
0.0154
0.0201
0.0254
0.0314
0.038
0.045
0.053
0.062
0.071
0.080
0.091
0.102
0.113
0.126
0.139
0.152
Spring #
Relax length
Diameter (µm)
1
2
3
7
Annealed Cold drawn
stainless
copper
steel
20
30
Alloyed
Cold drawn
stainless
steel
50
80
Max strength (daN or Kg) to avoid wire elongation
0.002
0.009
0.020
0.035
0.055
0.079
0.108
0.141
0.178
0.220
0.266
0.317
0.372
0.431
0.495
0.563
0.636
0.713
0.794
0.880
0.970
1.064
0.006
0.025
0.057
0.101
0.157
0.226
0.308
0.402
0.509
0.628
0.760
0.905
1.062
1.232
1.414
1.608
1.816
2.036
2.268
2.513
2.771
3.041
0.009
0.038
0.085
0.151
0.236
0.339
0.462
0.603
0.763
0.942
1.140
1.357
1.593
1.847
2.121
2.413
2.724
3.054
3.402
3.770
4.156
4.562
0.016
0.063
0.141
0.251
0.393
0.565
0.770
1.005
1.272
1.571
1.901
2.262
2.655
3.079
3.534
4.021
4.540
5.089
5.671
6.283
6.927
7.603
0.025
0.101
0.226
0.402
0.628
0.905
1.232
1.608
2.036
2.513
3.041
3.619
4.247
4.926
5.655
6.434
7.263
8.143
9.073
10.053
11.084
12.164
Initial
Minimum Minimum Maximum Strength /
length in
strength
length
strength
length
the WSR
(daN)
(mm)
(daN)
(daN/mm)
(mm)
53
38.6
0.129
12.8
0.360
0.009
44.5
38.6
0.136
15.1
0.670
0.023
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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Part VIII: Laboratory use
6mm screw
cursor moves when rotating the screw
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Part VIII: Laboratory use
2.2 WSR-S. Spring exchange
If 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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Part VIII: Laboratory use
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!
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Part VIII: Laboratory use
2.3 WSR mounting and configuration
First, 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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Part VIII: Laboratory use
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) .
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Part VIII: Laboratory use
2.4 WSR-S, Wire handling
Important: The central part of the wire must not be touched else must be cleaned, otherwise
measurement accuracy will decrease a lot.
1
2
3
3
1:
2:
3:
4:
Tighten the wire with a suitable distance between your 2 hands to easily operate the clamps
Push the right clamp in order to compress the internal spring
Open both clamps
Put the wire inside and release clamps
Clamp is close
Clamp is open
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Part VIII: Laboratory use
2.5 WSR-F, Wire handling
Important: The central part of the wire must not be touched else must be cleaned, otherwise
measurement accuracy will decease a lot.
Tighten the wire with a suitable distance between your 2 hands to easily fix the wire.
1
Adhesive tape
wheel for tension adjustment
The wire is fixed with double-face adhesive tape.
You must twist the wire around both side support.
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Part VIII: Laboratory use
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 avoid
elongation (diameter reducing)
2.6 Wire sample acquisition (rotation)
Rotate 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 the
rotation speed.
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Part VIII: Laboratory use
During the rotation, the instrument displays the angular position from 0 to 180deg
2.7 Results reading
At 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 result
in the following way
Display example
Explanation
Average diameter
40.25
H
Maximum diameter during rotation
40.42
L
40.11
Minimum diameter during rotation
E
0.31
Wire ovality (max - min)
P
240
LDS user's manual
Number of measurement points during
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Part VIII: Laboratory use
rotation
We recommend to use CIM Lab software in order to benefit from data logging, and statistics
features.
3 Foot pedal
The foot pedal is used in laboratory conditions in order to send acquisition order to the instrument
by keeping your hands free.
It must be used together with the "Wire laboratory support". See wire laboratory support chapter
for more details.
3.1 Foot pedal connexion and configuration
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 -> Digital
interface -> Digital I/O) .
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Part VIII: Laboratory use
3.2 Foot pedal acquisition and results
In 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 points
is incremented and displayed.
Display example
1 ... 2 ... 99
You 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
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Part VIII: Laboratory use
Average diameter
476.8
H
476.9
Maximum diameter.
L
476.6
Minimum diameter
If you want to display it again, you just have to make a long press again.
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Part IX: Maintenance, security and troubleshooting
Part IX: Maintenance, security and
troubleshooting
1 Optical system cleaning
The 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 is
sufficient.
Remember that dusts on the lenses degrade the measurement’s accuracy.
Clean with cotton
and alcohol
LDS user's manual
Clean from the
center to the edge
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Part 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.
2 Calibration and accuracy
2.1 Overview
We describe here the way CERSA-MCI proceeds to calibrate and linearize LDS instruments in
order to benefit the maximum of their performance. It indicates also how we can certify the
maximum uncertainty of the instruments.
In cooperation with fine wire specialized foreign national laboratories and university, CERSA-MCI
has developed a complete process for ultra fine wire calibration and the linearization of its LDS
instruments. We also have developed a complete test and validation procedure to certify the
performance of each instrument. That opens the way to very demanding applications like gold
wires.
2.2 Partner reference laboratories
National 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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Part IX: Maintenance, security and troubleshooting
2.3 Metrological certificates
The 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
2.4 CERSA reference LDS instruments
The diffraction instruments are not absolute (reference) measurement instruments. At the
opposite, the CERSA-MCI instruments benefit of an exceptional repeatability and long term
stability. Then, the key point is to give them measurement references at the level of their
performance. 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 limited
ovality 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 calibration
of these wires. The full uncertainty is given within ±0.15µm. They are kept in CERSA under
safety 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 the
shape of the diffraction deviation, in order to minimize the uncertainties of each individual wire
This is the finest way to reference the instruments at its level of performance.
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Part IX: Maintenance, security and troubleshooting
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”.
2.5 CERSA standard wires. SWB
From the same source of wires, we generate pieces of wires on supports which are calibrated from
the reference instruments. These wires are delivered to our customers by sets 4 wires in a box to
check at the measurement stability of each instrument.
We recommend you to purchase a set of standard wires together with your LDS for periodical
checking.
Here below are the available diameters:
Reference
SWB0200
SWB0800
Wire 1
30
30
Wire 2
90
190
Wire 3
140
400
Wire 4
190
800
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Part IX: Maintenance, security and troubleshooting
SWB2000
90
400
1000
2000
values in µm
2.6 Customer linearization
The 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 Toolbox
6. 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 the
standard value and the diffraction value with red dots.
In these conditions (Regression deactivated) the instrument will use linear approximation between
points of this table.
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Another solution consists in using an order 3 regression curve (A0 + A1 * Diameter + A2 *
Diameter ^2 + A3 * Diameter ^3).
You need more than 3 points to use this approach. Select "Regression" parameter, the computed
coefficients and the curve are displayed as follow:
You can delete points from the linearization table with Delete button. When you add à point a
window appears to enter the standard value.
When you finish the acquisition click on "Transfer to instrument" in order to load parameters in the
instrument.
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.
2.7 Standard wire coming from weight
measurement
In case of you want to make the linearization with your own wires, in order to take in account the
ovality 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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Part IX: Maintenance, security and troubleshooting
and Standard diameter (your own reference diameter from weight measurement)
4. Transfer to instrument.
3 Error codes
In case of measurement problem or error, the instrument will show on the local display an error
code "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 these
codes, please refer to the following table:
Event
code
value
Text displayed in
CIM
Description
5
2
0
-1
OUT HIGH
OUT LOW
OK
COMM_ERROR
-2
-3
-4
-16
-200
-202
-204
-209
-211
-212
-300
-301
-402
-498
CHANGE SPOOL
EVENT OVF
EVENT MAX
RS232 ERR.
HIGH TEMP
UNST TEMP
EEPROM
HW VER. INC.
CAPT_T
WATCHDOG
POSITION OUT
WRONG POSITION
SIGNAL DIRTY
SIGNAL
Tolerance current state out high
Tolerance current state out low
Tolerance current state ok
Prioritary CIM information. Instrument deconnexion.
Comm error.
Indicates a spool change. Time length reset.
Internal event used for events management
Internal event used for events management
Internal event used for comm management
Temperature is too high
Temperature is not stable
Internal storage error
Internal communication error
Internal temperature sensor failure.
Internal software failure.
Fiber position is not correct
Fiber position is not correct
Signal is not correct for analyse
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.
4 Safety rules
There is no particular protection constraint for users in the case of a normal operation of the
devices. Nevertheless hazardous reflections can be emitted afforded by the aversion response for
unaided viewing.
Laser source information:
Class 2M laser device according to the classifications given by the "American National Standards
Institute", document ANSI Z136.1-2007, page 1.
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Part X: Embedded software versions
Part X: Embedded software versions
The following history table highlights the technical changes made to the instrument embedded
software.
Embedded
version
Date
2013/07/01 2013/07/01
V1
V4
2014/11/30
2015/07/10
Evolution
LS ONE version
LDS iw now compatible with CIM software
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
compatibilit
y
Not
compatible
CIM 6.0
CIM 6.4
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Part XI: User's manual versions
Part XI: User's manual versions
The following history table highlights the technical changes made to the instrument user's manual.
User's manual
version
4.9
13.0
14.0
LDS user's manual
Date
2013/07/01
2014/11/30
2015/07/10
Evolution
Old LS ONE version
LDS iw now compatible with CIM software
Update specifications for LDS.
Update Toolbox linearization graphs and
number of points.
Add list of parameters for analog and digital
outputs.
Embedded
software
2013/07/01
V1
V4
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