35,0(6Original Instructions

ScanFieldMonitor SFM
LaserDiagnosticsSoftware LDS

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

IMPORTANT!
READ CAREFULLY BEFORE USE.
KEEP FOR FUTURE USE.

Revision 01 EN - 05/2021

3

35,0(6ScanFieldMonitor SFM

Table of contents
1

Basic safety instructions

8

2

Symbols and conventions

93

About this operating manual

104Conditions at the installation site

105Important notes on the lithium-ion battery (power bank)

11

5.1
5.2
5.3
5.4
6

Charge the power bank............................................................................................................11
Store the power bank...............................................................................................................11
Dangers to health and the environment in the event of damage to the power bank..................11
Shipping the power bank.........................................................................................................11

Device description
6.1
6.2

12

Functional description..............................................................................................................12
Measuring principle..................................................................................................................13

7

Quick overview installation

14

8

Install/uninstall plugin

15

9Transport

16

10Charge the power bank16

10.1 Setting the output voltage on the power bank..........................................................................17
10.2 Check the charging status of the power bank..........................................................................17
11

Installing the protective window spacer on the ScanFieldMonitor SFM

18

11.1 Removing the protective window and O-ring on ScanFieldMonitor SFM...................................18
11.2 Installing the protective window spacer....................................................................................19
12

Install device holder on the building platform of the laser system

20

12.1 Prepare installation...................................................................................................................20
12.2 Installation position...................................................................................................................20
12.2.1 Alignment to the laser beam......................................................................................20
12.2.2 Aligning the ScanFieldMonitor SFM using the alignment tool......................................2212.2.3 Aligning the ScanFieldMonitor SFM with protective window spacer using thealignment tool............................................................................................................23
12.3 Installation of the device holder on the building platform of the laser system.............................24
13

Electrical connection

25

13.1 Power supply of the ScanFieldMonitor SFM.............................................................................25
13.2 Connecting the ScanFieldMonitor SFM to the Processing Unit.................................................25
13.3 Connectivity options WLAN or Ethernet....................................................................................26
13.3.1 For a WLAN connection with the Processing Unit......................................................26
13.3.2 For an Ethernet connection with the Processing Unit.................................................26
13.4 Establish/disconnect WLAN connection with the PC................................................................27
14

Switch the ScanFieldMonitor SFM on/off

28

14.1 Switch on the ScanFieldMonitor SFM.......................................................................................28
14.2 Switch off the ScanFieldMonitor SFM.......................................................................................28
15

Position the ScanFieldMonitor SFM with Processing Unit on the building platform of thelaser system

29

15.1 Positioning the ScanFieldMonitor SFM and Processing Unit.....................................................29
15.2 Removing the ScanFieldMonitor SFM from the building platform .............................................29

4

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16

Measuring

35,0(630

16.1 Safety instructions....................................................................................................................30
16.2 Consider the messages in the LaserDiagnosticsSoftware LDS during measurement................32
16.3 Connecting the ScanFieldMonitor SFM with the LaserDiagnosticsSoftware LDS......................33
16.3.1 Connect device..........................................................................................................33
16.3.2 The device does not appear in the connections window............................................34
16.4 General procedure for measuring.............................................................................................35
16.4.1 Open the Device control menu...................................................................................35
16.4.2 Select measuring mode.............................................................................................35
16.4.3 Configuring and saving measurement settings...........................................................36
16.5 Performing automatic determination of the trigger amplification................................................37
16.5.1 Procedure for automated setting of the trigger diode.................................................37
16.5.2 Selecting automatic trigger amplification measuring mode.........................................38
16.5.3 Configuring the settings (Device control > Settings).................................................38
16.5.4 Configuring the advanced settings (Device control > Advanced).............................39
16.5.5 Starting measurement of the automatic trigger amplification......................................39
16.5.6 Displaying the determined trigger amplification and transfer to all measuring modes..39
16.5.7 Displaying the determined trigger amplification in the project tree...............................40
16.6 Basic settings for all measuring modes....................................................................................41
16.6.1 Selecting the measuring mode Expert........................................................................41
16.6.2 Configuring the settings (Device control > Settings).................................................42
16.6.3 Configuring the advanced settings (Device control > Advanced).............................43
16.7 Performing measurement of a single vector..............................................................................45
16.7.1 Selecting the measuring mode Single vector..............................................................45
16.7.2 Configuring the settings (Device control > Settings).................................................45
16.7.3 Configuring the advanced settings (Device control > Advanced).............................46
16.7.4 Starting a single vector measurement........................................................................46
16.7.5 Displaying single vector measurement result..............................................................47
16.7.6 Displaying measurement errors in the LaserDiagnosticsSoftware LDS........................49
16.8 Performing measurement of a caustic......................................................................................50
16.8.1 Procedure for measuring a caustic.............................................................................50
16.8.2 Selecting the measuring mode Caustic......................................................................51
16.8.3 Configuring the settings (Device control > Settings).................................................51
16.8.4 Configuring the advanced settings (Device control > Advanced).............................53
16.8.5 Starting a caustic measurement.................................................................................54
16.8.6 Displaying the measurement results...........................................................................55
16.9 Performing measurement of the delay time (laser on and laser off delay)..................................58
16.9.1 Procedure for measuring the delay time.....................................................................58
16.9.2 Selecting the measuring mode Delay time..................................................................59
16.9.3 Configuring the settings (Device control > Settings).................................................60
16.9.4 Configuring the advanced settings (Device control > Advanced).............................61
16.9.5 Starting a delay time measurement............................................................................62
16.9.6 Displaying the measurement results...........................................................................63
17

Discussion of the measuring results and error analysis

64

18

Troubleshooting

65

19

Maintenance and service

66

19.1 Exchanging the protective window on the device.....................................................................66
19.1.1 Safety instructions.....................................................................................................67
19.1.2 Exchanging the protective window on ScanFieldMonitor SFM and check O-ring........68
19.1.3 Exchanging the protective window on the protective window spacer andcheck O-ring..............................................................................................................69
20

Measures for the product disposal

70

21

Declaration of conformity

71

Revision 01 EN - 05/2021

5

35,0(6ScanFieldMonitor SFM

22

Technical data

72

23

Dimensions

74

23.1
23.2
23.3
23.4
24

ScanFieldMonitor SFM.............................................................................................................74
ScanFieldMonitor SFM with protective window spacer.............................................................75
Device holder...........................................................................................................................76
Processing Unit........................................................................................................................76

Appendix77

24.1 Patent notice............................................................................................................................7724.2 GNU GPL license notice...........................................................................................................77

6

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

35,0(6PRIMES - The Company
PRIMES manufactures measuring devices used to analyze laser beams. These devices are employed forthe diagnostics of high-power lasers ranging from CO2 lasers and solid-state lasers to diode lasers. A wavelength range from infrared through to near UV is covered, offering a wide variety of measuring devices todetermine the following beam parameters:••••

Laser power
Beam dimensions and position of an unfocused beam
Beam dimensions and position of a focused beam
Beam quality factor M²

Development, production and calibration of the measuring devices is performed at PRIMES. This guarantees
optimum quality, excellent service, and a short reaction time, providing the basis for us to meet all of ourcustomers’ requirements quickly and reliably.

PRIMES GmbH
Max-Planck-Str. 264319 Pfungstadt
GermanyTel +49 6157 9878-0
info@primes.dewww.primes.de

Revision 01 EN - 05/2021

7

35,0(61

ScanFieldMonitor SFM

Basic safety instructions

Intended use
The device has been designed exclusively for measurements in the beam of high-power lasers.
Use for any other purpose is considered as not intended and is strictly prohibited. Furthermore, intended use
requires that you observe all information, instructions, safety notes and warning messages in this operating
manual. The specifications given in chapter 22 „Technical data“ on page 72 apply. Any given limit values
must be complied with.
If not used as intended, the device or the system in which the device is installed can be damaged or
destroyed. In addition, there is an increased risk to health and life. Only use the device in such a way that
there is no risk of injury.
If you still have questions after reading this operating manual, please contact PRIMES or your supplier foryour own safety.
Observing applicable safety regulations
Observe the safety-relevant laws, guidelines, standards and regulations in the current editions published by
the state, standardization organizations, professional associations, etc. In particular, observe the regulations
on laser safety and comply with their requirements.
Necessary safety measures
The device measures direct laser radiation, but does not emit any radiation itself. However, during the measurement the laser beam is directed at the device. This produces scattered or directed reflection of the laser
beam (laser class 4). The reflected beam is usually not visible.
Protect yourself from direct and reflected laser radiation while working with the device by taking the following
measures:
•
•
•
•
•
•
•

Never leave the device unattended when taking measurements.
If the device is moved from its aligned position, increased scattered or directed reflection of the laser
beam occurs during measuring operation. Fix the device in such a way that it cannot be moved by unintentional bumping or pulling on the cables.
Install safety switches or emergency safety mechanisms that allow the laser to be switched off immediately.
Use suitable beam guidance and beam absorber elements which do not emit any hazardous substances
when irradiated.
Wear safety goggles adapted to the power, power density, laser wavelength and operating mode of thelaser beam source in use.
Wear suitable protective clothing or protective gloves if necessary.
If possible, also protect yourself from direct laser radiation and scattered radiation by using separating
protective devices that block or attenuate the radiation.

Employing qualified personnel
The device may only be operated by qualified personnel. The qualified personnel must have been instructedin the installation and operation of the device and must have a basic understanding of working with highpower lasers, beam guiding systems and focusing units.
Conversions and modifications
The device may not be modified in terms of design or safety without the explicit consent of the manufacturer.
The same applies to unauthorized opening, dismantling and repair. The removal of covers is only permitted
within the scope of the intended use.

8

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

35,0(6

Liability disclaimer
Manufacturer and distributor exclude any liability for damages and injuries which are direct or indirect consequences of using the device not as intended or modifying the device or the associated software withoutauthorization.

2

Symbols and conventions

Warning messages
The following symbols and signal words indicate possible residual risks in the form of warnings:

DANGER
Means that death or serious physical injuries will occur if necessary safety precautions are nottaken.

WARNING
Means that death or serious physical injuries may occur if necessary safety precautions are nottaken.

CAUTION
Means that minor physical injury may occur if necessary safety precautions are not taken.

NOTICE
Means that property damage may occur if necessary safety precautions are not taken.

Product safety labels
The following symbols are used on the device itself to indicate imperatives and possible dangers:

Warning of hot surface

Read and observe the operating instructions and safety guidelines before startup!

A lithium-ion battery (power bank) is located on the top of the Processing Unit. To avoid healthand environmental damage, the power bank must be disposed of in accordance with the applicable national and international laws.

Revision 01 EN - 05/2021

9

35,0(6ScanFieldMonitor SFM

Further symbols and conventions in this operating manual
Here you can find useful information and helpful tips.

Indicates a simple instruction.
If several such instructions appear one below the other, then the order of their execution is irrelevant or they are alternative procedures.

1.
2.
...

A numbered list identifies a sequence of instructions that must be executed in the specified order.

Indicates the result of an action to explain processes that take place in the background.
Indicates an observation prompt that draws your attention to visible feedback from the device or
the software.
Observation prompts make it easier to check whether an instruction was executed successfully
and often also guide you to the next instruction.
Points to a control element that is to be pressed/clicked in images of the device/graphical userinterface.

Points to an element described in the text (e.g. an input field) in graphical user interface images.

3

About this operating manualThis documentation describes the installation and configuration of the ScanFieldMonitor SFM and the execution of measurements with the PRIMES LaserDiagnosticsSoftware LDS.
The LaserDiagnosticsSoftware LDS and the plugin for the ScanFieldMonitor SFM must be installed on the PC
for measuring operation of the ScanFieldMonitor SFM. The basic version of the LaserDiagnosticsSoftware
LDS and the plugin for the ScanFieldMonitor SFM are included in the scope of delivery.
For a detailed description of the software installation, file management and evaluation of the measured data,
please refer to the separate operating manual LaserDiagnosticsSoftware LDS.

4
•
•
•
•

10

Conditions at the installation site
The device must not be operated in a condensing atmosphere.
The ambient air must be free of organic gases.
Protect the device from splashes of water and dust.
Operate the device in closed rooms only.

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

535,0(6

Important notes on the lithium-ion battery (power bank)

A power bank is located on the upper side of the Processing Unit. Two different versions are distinguished:• A Processing Unit with exchangeable power bank. For this Processing Unit the power bank can bepulled out and replaced.
• A Processing Unit with permanently installed power bank. For this Processing Unit the power bank cannot be removed.
Be aware that this power bank may ignite at high temperatures. For operation, storage and shipping, refer tothe information according to chapter 22 „Technical data“ on page 72.

5.1

Charge the power bank

Charge the power bank completely before using it for the first time. The first complete charge requires
approx. 5 hours. Only use the supplied USB cable and quick-charge plug-in power supply to charge thepower bank. Recharge the power bank when the charge level reaches 20 percent. Do not charge the powerbank unattended, e.g. overnight. Do not expose the device to direct sunlight.

5.2

Store the power bank

Store the device with power bank or the removed power bank in a cool dry place. Keep a minimum distanceof 3 m from flammable materials. Do not expose the device to direct sunlight. Please recharge the powerbank at least every three months.

5.3

Dangers to health and the environment in the event of damage to the power bank

In general, contact with leaked power bank components may pose a risk to health and the environment:• When the power bank is damaged, fluids (electrolytes) may leak out. These are flammable, contact withthe eyes or skin may cause irritation.
• Vapors may irritate the eyes, respiratory organs, and skin.
• Fire or intense heat may cause violent bursting. Heating or fire may release toxic gases. Burning produces irritating smoke.

5.4

Shipping the power bank

The Processing Unit with inserted power bank or permanently installed power bank is a dangerous goodin case of shipment and is classified as “lithium ion batteries contained in equipment”. If the power bank is
enclosed with the Processing Unit, the power bank is classified as “lithium ion batteries with equipment”.
Particularly in the case of a damaged power bank, special regulations must be observed. Please observe therequirements for shipping according to the valid regulations.

Revision 01 EN - 05/2021

11

35,0(66

Device description

6.1

Functional description

ScanFieldMonitor SFM

The measuring system consists of the ScanFieldMonitor SFM and the Processing Unit with power bank. For
stable installation of the ScanFieldMonitor SFM on the building platform of the laser system a device holder is
supplied.
The device holder must be mounted stable in the laser system by the customer and holds the
ScanFieldMonitor SFM at the respective measuring position. The laser radiation passes through the device
during measurement and exits at the bottom of the ScanFieldMonitor SFM. For a secure operation the
ScanFieldMonitor SFM may only be operated with a device holder that is able to absorb the exiting laser
radiation. For exact alignment of the ScanFieldMonitor SFM to the laser beam an alignment tool is supplied.
The ScanFieldMonitor SFM is connected to the Processing Unit via the connecting cable.
The ScanFieldMonitor SFM is supplied with power:• by the power bank in the Processing Unit or• by the supplied USB cable with quick-charge plug-in power supply. This is plugged into the USB connection socket of the processing unit with the power bank.
Please note that the connected ScanFieldMonitor SFM is switched off when the USB cable is pulled out of
the USB connection socket of the Processing Unit.
The power bank display shows the charge status in percent and the set output voltage (12 V).
Measurement data is transmitted either wirelessly via WLAN or with an Ethernet cable. This enables fast datatransfer during the measurement. The PC used requires a WLAN module for wireless transmission.
The ScanFieldMonitor SFM is controlled and the measurement results evaluated using theLaserDiagnosticsSoftware LDS.
Alignment tool
Processing Unit

Power bank

Power bank display
On/off button
Power bank
USB connection socket for
charging the power bankFig. 6.1:

12Connecting cable

On/off button Processing Unit

ScanFieldMonitor SFM

Socket for connection cable

Device holder

Ethernet connection socket

Functional description of the ScanFieldMonitor SFM

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

6.2

Measuring principle

The ScanFieldMonitor SFM is equipped with a glass plate, in the middle of which is a small scattering structure. As the laser beam passes over the scattering structure, part of the laser beam is scattered along thelines of the scattering structure. This scattered light is detected by a photodiode in a time track. By knowing
the exact position, angle and shape of the scattering structure, the laser path and the beam radius of thelaser beam are determined by evaluating the time track in the LaserDiagnosticsSoftware LDS. When measuring at one position, the following quantities can be determined:•••

Beam radius along the scan direction of the vector
Scanning speed
Position of the vector (start and end point, angle and length)

In order to measure the working plane, especially the corner areas of the closed scan field, the device ispositioned at different positions within the scan field.
The ScanFieldMonitor SFM can also be used to measure a scan field with several lasers or to align adjacentscan fields.
The examination of the overlapping areas of these scan fields is particularly important because the two lasers
must be precisely matched to each other in order to irradiate this region completely and, above all, uniformly.
Since the ScanFieldMonitor SFM can also work with a large angle of incidence, this area can also be measured.
To measure the caustics of the laser beam along the beam propagation direction, the ScanFieldMonitor SFM
is raised or lowered by the z-axis of the system to be measured. This allows the ScanFieldMonitor SFM to be
moved in z-direction and the beam diameter to be measured in different planes. Thus, all important propagation parameters of the entire caustic of the laser beam are obtained:••••

like focus position and focus diameterthe beam quality factor M²
the Rayleigh length
the divergence and the angle of incidence

not only in the center position but also for the deflected laser beam.
From the evaluation of all measurements, additional derived variables are obtained, such as the focus position over the entire processing field. Furthermore, measuring the switch-on and switch-off delay of the laser
is possible via a separate measurement mode.
Laser beam
Photodiode(xi,yi)Scattering
structureyGlass plate

t1

t2

t3
Time

VectorFig. 6.2:

t4

t5

t6

(xf,yf)φx
VectorMeasuring principle of the ScanFieldMonitor SFM

Revision 01 EN - 05/2021

13

35,0(67ScanFieldMonitor SFM

Quick overview installation

1.

Installing the LaserDiagnosticsSoftware LDS on the computer•

The software is included in the scope of delivery.

See separate
Operating Manual of theLaserDiagnosticsSoftware LDS

2.

Taking safety precautions

Chapter 1 on page 83.

Installing the plugin ScanFieldMonitor SFM on the computer

Chapter 8 on page 15•

Software is part of the scope of delivery

4.

Charge the power bank•

Set output voltage•

Check charge status

5.

Installing the protective window spacer onto the ScanFieldMonitor SFM•

For high power densities above 15 MW/cm² on the protective window of the
ScanFieldMonitor SFM

6.

Install device holder on the building platform of the laser system•

Make preparations•

Set installation position•

Align the ScanFieldMonitor SFM with the device holder•

Install the device holder

7.

Electrical connection•

Establish power supply•

Connect the ScanFieldMonitor SFM to the Processing Unit•

Establish WLAN or Ethernet connection with the PC

8.

Switch ScanFieldMonitor SFM on/off

Chapter 14 on page 28

9.

Position the ScanFieldMonitor SFM with the Processing Unit on the building
platform of the laser system

Chapter 15 on page 29

10. Perform the measurement•

Observe safety instructions•

Perform measurements

14

Chapter 10 on page 16

Chapter 11 on page 18

Chapter 12 on page 20

Chapter 13 on page 25

Chapter 16 on page 30

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

8Install/uninstall plugin

1. Close the opened LaserDiagnosticsSoftware LDS.
2. Double-click in the Windows start menu under Primes\LaserDiagnosticsSoftware on the file:
Configuration Tool.
3. Click on the Install Plugins tab in the window.
4. Click on the Search for Plugin button.
5. Choose the storage location where your installed plugins are saved:
xx The plugin will be displayed. If there are multiple plugins, they will be listed together.
6. Check the box next to the plugin to be installed.
7. Click on the Install button:
xx You will see the following message:
The plugin has been installed successfully / The plugins have been installed successfully.
xx The plugin will then be available directly in the tool bar of the LaserDiagnosticsSoftware LDS.
Please note that after updating the LaserDiagnosticsSoftware LDS, the plugin must also bereinstalled. To do this, uninstall the old plugin and install the new plugin after updating theLaserDiagnosticsSoftware LDS.
To uninstall
1. Close the opened LaserDiagnosticsSoftware LDS.
2. Double-click in the Windows start menu under Primes\LaserDiagnosticsSoftware on the file:
Configuration Tool.
3. Click on the Uninstall Plugins tab in the window.
4. Place a check mark in the check box of the plugins you want to uninstall.
5. Click on the Uninstall button.
xx You will see the following message:
The plugin has been uninstalled successfully / The plugins have been uninstalled successfully.

Listing of plugins

Fig. 8.1:

Install plugin

Revision 01 EN - 05/2021

15

35,0(69ScanFieldMonitor SFM

Transport

NOTICE
Damage/destruction of the ScanFieldMonitor SFM or the Processing Unit
Hard impacts or dropping can damage the optical components of the ScanFieldMonitor
SFM or the Processing Unit.
X Handle the device carefully when transporting or installing it.
X To avoid contamination, close the inlet aperture of the ScanFieldMonitor SFM with the supplied alignment aid for transport and storage.

10

Charge the power bank

A power bank is located on the upper side of the Processing Unit. Two different versions are distinguished:• A Processing Unit with exchangeable power bank. For this Processing Unit the power bank can bepulled out and replaced.
• A Processing Unit with permanently installed power bank. For this Processing Unit the power bank cannot be removed.
Use only the supplied USB cable and quick-charge plug-in power supply to charge the power bank.
Recharge the power bank when the charge level reaches 20 percent.
To charge the power bank, please proceed as follows:
1. Press the on/off button on the Processing Unit for at least five seconds:
xx The ring light on the Processing Unit flashes and switches off.
xx The ScanFieldMonitor SFM is switched off.
xx The power bank switches off automatically after a few seconds.
2. Insert the plug of the quick-charge power supply unit into the charging socket of the Processing Unit. If
the power bank is already removed, use its integrated socket for charging:xx The charge status is shown in percent in the power bank display.
orPower bank
On/off button Processing Unit
Processing Unit
Fig. 10.1:

Charge the Processing Unit with installed power bank or charge the removed power bank, both with thequick-charge plug-in power supply

During the charging process, further information can be shown in the display:
Display during charging

Meaning

MeasureBattery symbol flashes andalternates with the display of thecharging power in W

The power bank is charging

---

16

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

Display during charging

Meaning

MeasureOVOver voltage

UV

Under voltage

The charging process is stopped automatically:• Activate the Processing Unit again by briefly
pressing the on/off button.

OC

Charge current too highOT

Temperature too highTab. 10.1:

10.1

The charging process is stopped automatically:• Let the power bank cool down. Continue charging after the power bank has cooled down.
• Activate the Processing Unit again by briefly
pressing the on/off button.

Displays during charging

Setting the output voltage on the power bank

The power bank offers the possibility to set the output voltage. The ScanFieldMonitor SFM can be operated
with any output voltage of the power bank. However, the power consumption of the Processing Unit is lowest at 12 V output voltage.
To set the output voltage on the power bank, please proceed as follows:
1. Press the on/off button of the power bank for at least three seconds until the volt value in the powerbank display flashes:• Each time the on/off button is pressed again, the selected output voltage switches further(12 V, 15 V, 16.5 V, 19 V, 20 V, 24 V).
• Without further pressing, the displayed output voltage is set.
• You can check the set output voltage at any time by briefly pressing the on/off button.

10.2

Check the charging status of the power bank

The charge status of the power bank is displayed in percent. The accuracy of this display depends on various factors (e.g. temperature, age of the power bank, etc.). Recharge the power bank when the charge level
reaches 20 percent.
When the power bank is fully discharged, the charging time with the supplied quick-charge plug-in power
supply is approx. 5 hours. At 100% charge status, the possible operating time is approx. 6 hours.

On/off button
Power bank

Power bank display

On/off button
Processing Unit

Fig. 10.2:

Set output voltage on power bank and check charge status

Revision 01 EN - 05/2021

17

35,0(611

ScanFieldMonitor SFM

Installing the protective window spacer on the ScanFieldMonitor SFM

For high power densities above 15 MW/cm² at the ScanFieldMonitor SFM protective window, we recommend operating the ScanFieldMonitor SFM with the protective window spacer.
With the spacer we enlarge the distances between measurement structure and protective window. Thereby
the power density on the protective window is reduced to a noncritical range. Please note that when using
the protective window spacer, the protective window in the ScanFieldMonitor SFM must be dismantled.

11.1

Removing the protective window and O-ring on ScanFieldMonitor SFM

1.
2.
3.
4.
5.

Observe the safety instructions in chapter 19.1.1 on page 67.
Unscrew the 5 Torx screws M2 x 3 mm (Torx 6 screwdriver) at the protective window holder.
Put on powder-free latex gloves.
Remove the protective window holder carefully upwards.
Remove the protective window from the ScanFieldMonitor SFM. We recommend to use a suction cup to
remove the protective window.
6. Remove the O-ring from the indentation.
7. Tighten the protective window holder with 5 Torx screws M2 x 3 mm.
8. Check for secure fit of the protective window holder. The protective window holder must lie flat against
the housing of the ScanFieldMonitor SFM.

Torx screws
M2 x 3 mmProtective windowholderProtective window
O-RingIndentation

Fig. 11.1:

18

Removing the protective window and O-ring on ScanFieldMonitor SFM

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

11.2

Installing the protective window spacer

1. Place the protective window spacer on the ScanFieldMonitor SFM.
2. Tighten the protective window spacer with 2 Torx screws M3 x 25 mm (Torx 10 screwdriver).
3. Check for secure fit of the protective window spacer. The protective window spacer must lie flat against
the housing of the ScanFieldMonitor SFM.

Torx screws
M3 x 25 mm

Protective window
spacerFig. 11.2:

Installing the protective window spacer

Revision 01 EN - 05/2021

19

35,0(6ScanFieldMonitor SFM

12Install device holder on the building platform of the laser system

12.1

Prepare installation

1. Turn the laser source off.
2. Ensure that moving parts are at a standstill and that they cannot be set in motion unintentionally.

NOTICE
Damage/Destruction of the device
Powder residues or contamination on the device lead to burn-in during measuring operation.
Burn-ins disturb the measurement and can cause the protective window to shatter or splinter.
The movement of the coater (scraper) can damage the ScanFieldMonitor SFM.
X Only operate the device in a cleaned laser system.
X Deactivate or remove the coater (scraper).
3. Clean the building platform of the laser system. There must be no powder residues and contamination
left on the building platform.
4. Deactivate or remove the coater (scraper).

12.2

Installation position

12.2.1

Alignment to the laser beam

The ScanFieldMonitor SFM is installed vertically and must be aligned to the laser beam. The
ScanFieldMonitor SFM is positioned in the focal plane (see Fig. 12.1 on page 21). Make sure that theallowed power density at the beam entrance is not exceeded.
The ScanFieldMonitor SFM has a square inlet aperture of 20 mm x 20 mm. Within this area the laser radiation can enter the device. The scattering structure relevant for measuring amounts approx. 7.5 mm x 7.5mm. We recommend to use vectors with a maximum length of 10 mm, i.e. 1.5 mm in front and behind thescattering structure.
The scattering structure can be crossed by the laser in x and y direction. During a measurement, the laser
must pass over the scattering structure at a constant speed and always in one direction as a straight line.
If the housing is irradiated instead of the inlet aperture, it is usually damaged by the laser beam. Due to theabsorption of the laser beam, the housing is also strongly heated, which leads to a considerable temperature
increase. An over temperature of the device is displayed in the LaserDiagnosticsSoftware LDS. If the housing
continues to be irradiated, the device may be damaged/destroyed.
To align the ScanFieldMonitor SFM under the laser, an alignment tool is supplied:• ScanFieldMonitor SFM (see chapter 12.2.2 on page 22).
• ScanFieldMonitor SFM with protective window spacer (see chapter 12.2.3 on page 23).

20

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

20°

Laser beam
Focal
plane
20 mm

10 mm

10 mm
Presentation with perpendicular beam incidence
Fig. 12.1:

10 mm

Presentation with max.
angle of incidence of 20 °ScanFieldMonitor SFM alignment to the laser beam

20°

Laser beam

Focal
plane
20 mm

10 mm
Presentation with perpendicular beam incidence
Fig. 12.2:

10 mm

10 mm
Presentation with max.
angle of incidence of 20 °ScanFieldMonitor SFM alignment to the laser beam with installed spacer

Revision 01 EN - 05/2021

21

35,0(612.2.2

ScanFieldMonitor SFM

Aligning the ScanFieldMonitor SFM using the alignment tool

Using the alignment tool and a pilot laser beam you can align the device to the laser beam (see Fig. 12.3 on
page 22).
1.
2.
3.
4.

Insert the ScanFieldMonitor SFM into the device holder:
Check the secure fit of the ScanFieldMonitor SFM in the device holder.
For an optimal fit, place the alignment tool on the provided drillings of the ScanFieldMonitor SFM.
Turn on the pilot laser and align the ScanFieldMonitor SFM.

With a perpendicular beam incidence from above or a lateral beam incidence, the laser beam of the pilot
laser must move along the lines of the alignment tool along the vector direction (see also Fig. 12.1 on
page 21).
1. Let the pilot laser move several times on the lines of the alignment tool along the x- and y-axis.
2. Align the device to the pilot laser exactly at the intersection of the cross hairs.

NOTICE
Damage/destruction of the alignment tool
The exposure with laser radiation will destroy the alignment tool.
X Remove the alignment tool before turning on the laser.
Alignment
tool

Protective
window
Drillings

Line

DeviceholderFig. 12.3:

22

Aligning the ScanFieldMonitor SFM using the alignment tool

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

12.2.335,0(6

Aligning the ScanFieldMonitor SFM with protective window spacer using the alignment tool

Using the alignment tool and a pilot laser beam you can align the device to the laser beam (see Fig. 12.4 on
page 23).
1.
2.
3.
4.

Insert the ScanFieldMonitor SFM into the device holder:
Check the secure fit of the ScanFieldMonitor SFM in the device holder.
For an optimal fit, place the alignment tool on the provided drillings of the spacer.
Turn on the pilot laser and align the ScanFieldMonitor SFM.

With a perpendicular beam incidence from above
With a perpendicular beam incidence from above, the laser beam of the pilot laser must move along the linesof the alignment tool along the vector direction (see also Fig. 12.2 on page 21).
1. Let the pilot laser move several times on the lines of the alignment tool along the x- and y-axis.
2. Align the device to the pilot laser exactly at the intersection of the cross hairs.
With a lateral beam incidenceWith a lateral beam incidence, the laser beam of the pilot laser must be aligned to a circle corresponding to
the angle of incidence of the laser beam. On the alignment tool there are auxiliary lines with 5, 10, 15 or 20
degrees (see also Fig. 12.2 on page 21).
1. Let the pilot laser move several times on the lines of the alignment tool along the x- and y-axis.
2. Align the device to the pilot laser exactly at the intersection of the cross hairs.
3. Move the device along the propagation direction until the laser beam hits the desired circle of the alignment tool (Fig. 12.4 on page 23 shows an example for 15 degree).
The propagation direction of the laser beam must run imaginary in the extension over the lines of thecross hairs.

NOTICE
Damage/destruction of the alignment tool
The exposure with laser radiation will destroy the alignment tool.
X Remove the alignment tool before turning on the laser.
Alignment
tool

CirclePropagation
directionLine

Protective
window
Drillings
Protective
window spacer

Pilot laser
DeviceholderFig. 12.4:

Aligning the ScanFieldMonitor SFM with spacer using the alignment tool

Revision 01 EN - 05/2021

23

35,0(612.3

ScanFieldMonitor SFM

Installation of the device holder on the building platform of the laser system

A device holder is supplied for installing the device at various positions on the building platform of the laser
system. The laser radiation passes through the device during measurement and exits at the bottom of the
ScanFieldMonitor SFM. For a secure operation the ScanFieldMonitor SFM may only be operated with adevice holder that is able to absorb the exiting laser radiation.
If the ScanFieldMonitor SFM is mounted by a customer device holder, it must be ensured that this device
holder can absorb the emitted laser radiation.

DANGER
Serious eye or skin injury due to laser radiation
If the device is moved from its aligned position, increased scattered or directed reflection of
the laser beam occurs during measuring operation (laser class 4).
X Mount the device holder for the ScanFieldMonitor SFM in such a way that the device cannot
be moved by an unintentional knock or cables being pulled accidentally.
The installation of the device holder on the building platform of the laser system has to be carried out by thecustomer. The accuracy with which the position of the vector in the scan field can be measured is mainly
determined by the accuracy of the customer’s mounting plate.

ScanFieldMonitor SFM
Device holder

Alignment toolFig. 12.5:

24

Installation position on the building platform of the laser system

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

13

Electrical connection

Please use only the supplied connection cables, the USB cable and the quick-charge plug-in power supply.

13.1

Power supply of the ScanFieldMonitor SFM

The ScanFieldMonitor SFM is supplied with power:• by the power bank in the Processing Unit or• by the supplied USB cable with quick-charge plug-in power supply. This is plugged into the USB connection socket of the processing unit with the power bank.
Please note that the connected ScanFieldMonitor SFM is switched off when the USB cable is pulled
out of the USB connection socket of the Processing Unit.

13.2

Connecting the ScanFieldMonitor SFM to the Processing Unit

1. Press the on/off button on the Processing Unit for at least five seconds to switch off the Processing Unit:
xx The ring light on the Processing Unit flashes and switches off.
2. Connect the ScanFieldMonitor SFM to the Processing Unit using the connection cable.
3. If the power bank needs to be charged permanently, connect the quick-charge plug-in power supply unit
with the Processing Units USB connection socket.
Plug-in power supply
ScanFieldMonitor SFM
Processing Unit
L= 2.0 m

Connection cable
Fig. 13.1:

On/off button
Processing Unit

Connecting the ScanFieldMonitor SFM with its Processing Unit

Revision 01 EN - 05/2021

25

35,0(6ScanFieldMonitor SFM

13.3

Connectivity options WLAN or Ethernet

13.3.1

For a WLAN connection with the Processing Unit

XX Activate the WLAN connection according to chapter 13.4 on page 27.
13.3.2For an Ethernet connection with the Processing Unit

NOTICE
Destruction of the network infrastructure
If the Processing Unit with ScanFieldMonitor SFM is directly connected to a network via
Ethernet, the SFM DHCP protocol randomly assigns IP addresses in the network. Thus, evenwith a short plugging in of the Ethernet cable, the infrastructure of the network can be damaged/destroyed.
X Never plug the Ethernet cable of the Processing Unit directly into a Ethernet socket of a
network.
X Ethernet connection needs to be established always and exclusively between Processing
Unit and PC.
XX Connect the Ethernet socket in the Processing Unit and the PC using the Ethernet cable.
xx The Ethernet connection is established automatically when the Ethernet cable is plugged in (see chapter
16.3.1 on page 33).
Processing Unit

PC
WLAN
or
Ethernet

Fig. 13.2:

26

Connecting Processing Unit to PC via WLAN or Ethernet

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

13.4

35,0(6

Establish/disconnect WLAN connection with the PC

1.

Switch on the device according tochapter 14.1 on page 28.

2.

Click on the WLAN Icon within the
Windows taskbar.
The Network & Internet settings window opens.

3.
•

•

Click on the desired device. In theexample shown:
PrimesSFMRO-1:
The designation PrimesSFMRO-1
corresponds to the SSID specificationon the Processing Unit identification
plate.
The password on the identification plate of the Processing Unit isassigned to this SSID.

4. Click on the Connect button.
XX Activate the check box Connect
automatically. This will establish connection next time automatically, SFM
WLAN key is stored.
Suitable for the standard PC used for
SFM measurements.

5.
•Enter the password:
You will find the password on theidentification plate of the Processing
Unit.

6. Click on the Next button:
xx The Processing Unit is connected to
the PC.

Note
The yellow warning triangle in the Windows taskbar, only indicates that there is
no Internet connection.
The function of the WLAN connection is
not affected.
7.

To disconnect the WLAN connection,
click on the Disconnect button.

Revision 01 EN - 05/2021

27

35,0(614

Switch the ScanFieldMonitor SFM on/off

14.1

Switch on the ScanFieldMonitor SFM

ScanFieldMonitor SFM

1. Switch on the power bank by briefly pressing the on/off button:
xx The display in the power bank shows the charge status in percent and the set output voltage (12 V).
XX If a different output voltage is displayed, you can set it according to chapter 10.1 on page 17.
2. Briefly press the on/off key on the Processing Unit:
xx The ring light on the Processing Unit lights up.
xx The display in the power bank shows the discharge power in W.
xx The ScanFieldMonitor SFM is switched on.

14.2

Switch off the ScanFieldMonitor SFM

1. Press the on/off button on the Processing Unit for at least five seconds:
xx The ring light on the Processing Unit flashes and turns off.
xx The ScanFieldMonitor SFM is switched off.
xx The power bank switches off automatically.

On/off button
Power bank

Power bank display

On/off button
Processing Unit
Fig. 14.1:

28

Switch ScanFieldMonitor SFM on/off

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

35,0(615

Position the ScanFieldMonitor SFM with Processing Unit on the building platform of the laser system

15.1

Positioning the ScanFieldMonitor SFM and Processing Unit

During measurements, the Processing Unit transmits the data wirelessly via WLAN or via Ethernet connection to the PC.
1. Turn off the laser source.
2. Ensure that moving parts are at a standstill and that they cannot be set in motion unintentionally.
3. Clean the building platform of the laser system. All powder residues and contamination must be
removed.
4. Deactivate the coater (scraper).
5. Switch on the ScanFieldMonitor SFM according to chapter 14.1 on page 28.
6. Insert the ScanFieldMonitor SFM into the device holder.

DANGER
Fire hazard
The Processing Unit is equipped with a power bank. If the power bank is damaged by thelaser beam, it may catch fire.
X Position the Processing Unit at a radiation-free location on the building platform.
7. Position the Processing Unit at a radiation-free location on the building platform.

15.2

Removing the ScanFieldMonitor SFM from the building platform

1. Turn off the laser source.
2. Ensure that moving parts are at a standstill and that they cannot be set in motion unintentionally.

CAUTION
Hot surface – risk of burns
The device and especially the device holder heat up during a measurement.
An overtemperature of the device is displayed in the LaserDiagnosticsSoftware LDS.
X Do not touch the device and the device holder directly after a measurement.
X Let the device and the device holder cool down for an adequate period of time. The coolingtime varies depending on the laser power and the irradiation time.
3.
4.
5.
6.

Remove the device from the laser system.
Switch off the ScanFieldMonitor SFM according to chapter 14.2 on page 28.
After using the ScanFieldMonitor SFM, check the optical components for damage.
To avoid contamination, cover the inlet aperture with the alignment tool.

Revision 01 EN - 05/2021

29

35,0(616

ScanFieldMonitor SFM

MeasuringThis chapter describes examples of measurements with the LaserDiagnosticsSoftware LDS and the plugin
for the ScanFieldMonitor SFM to familiarize you with the ScanFieldMonitor SFM.
For a detailed description of the software installation, file management and evaluation of the measured data,
please refer to the separate operating manual LaserDiagnosticsSoftware LDS.

16.1

Safety instructions

DANGER
Serious eye or skin injury due to laser radiation
During the measurement the laser beam is guided on the device, which causes scattered or
directed reflection of the laser beam (laser class 4). The reflected beam is usually not visible.
X Please wear safety goggles adapted to the power, power density, laser wave lengthand operating mode of the laser beam source in use.
X Wear suitable protective clothing and protective gloves.
X Protect yourself from laser radiation by separating protective devices (e.g. by using appropriate shielding).

DANGER
Fire hazard
The Processing Unit is equipped with a power bank. If the power bank is damaged by thelaser beam, it may catch fire.
X Before measuring, check that the Processing Unit is not positioned in the beam path of thelaser.

CAUTION
Hot surface – risk of burns
The device and especially the device holder become hot during a measurement.
An overtemperature of the device is displayed in the LaserDiagnosticsSoftware LDS.
X Do not touch the device and the device holder directly after a measurement.
X Let the device and the device holder cool down for an adequate period of time. The coolingtime varies depending on the laser power and the irradiation time.

NOTICE
Damage/Destruction of the device
Residual powder or contamination on the device will cause burn-ins during measuring operation. Burn-ins can cause the protective window to shatter or splinter.
The movement of the coater (scraper) can damage the ScanFieldMonitor SFM.
X Only operate the device in a cleaned laser system.
X Deactivate or remove the coater (scraper).

30

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

35,0(6NOTICE
Damage/Destruction of the device
If the housing is irradiated instead of the entrance aperture, it may become hot. An overtemperature of the device is displayed in the LaserDiagnosticsSoftware LDS. If the housing isirradiated further, the device may be damaged/destroyed.
X Finish the measurement and check the alignment of the device to the laser beam.

NOTICE
Damage/Destruction of the protective window
Contamination and fingerprints on the protective window can lead to damage or shatteringor splintering of the protective window during measuring operation. Parts of the protective
window can get into the laser system and damage it.
X Do not touch the protective window.
X Only operate the device with a clean protective window.

Revision 01 EN - 05/2021

31

35,0(616.2

ScanFieldMonitor SFM

Consider the messages in the LaserDiagnosticsSoftware LDS during measurement

If problems occur during a measurement, the LaserDiagnosticsSoftware LDS displays them in different categories and different colors.
Notes
Notes provide assistance in interpretingthe measurement results and are displayed in a blue window.
Use one of the following options:
XX Click on the warning triangle in thefooter to display/hide the window.
XX If applicable, click the Next message
button to display more messages ofthe same category.
XX Click the Confirm button to remove
the displayed message.
Warnings
Non-safety-critical problems that influence
the quality of the measurement results,
for example, are displayed in a yellow
window.
Use one of the following options:
XX Click on the warning triangle in thefooter to display/hide the window.
XX If applicable, click the Next message
button to display more messages ofthe same category.
XX Click the Confirm button to remove
the displayed message.
Safety critical device errors
Safety-critical problems that can resultin damage/destruction of the device aredisplayed in a red window.
In this case, proceed as follows:
1. Fix the problem immediately.
2. Click the Confirm button to remove
the message.
The message disappears. If the problem is not fixed, then the message
appears again shortly afterwards.
3. Do not proceed with the measurement until the problem is solved.

32

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

35,0(6

16.3

Connecting the ScanFieldMonitor SFM with the LaserDiagnosticsSoftware LDS

16.3.1Connect device

1.

Switch on the device according to chapter 14.1 on page 28.

Only for WLAN connection
XX Start the WLAN connection according to chapter 13.4 on page 27.
2.

Start the LaserDiagnosticsSoftware LDS by double-clicking on the program icon in the start menu group or on
the desktop icon.
The start logo

appears for a short time.

Only if the Show start screen option isenabled:The start screen appears.
3.

Select the Measure operating mode.

Only if the Show start screen option isdisabled:
4.

Click on the Devices tab and then on
the + Connect to device button.

The Connections window appears.
5. Click on the desired device.
XX If the device does not appear in theConnections window, see chapter
16.3.2 on page 34.
6.

Click on the Connect to device button.

Revision 01 EN - 05/2021

33

35,0(616.3.2

ScanFieldMonitor SFM

The device does not appear in the connections window

The connection between device andLaserDiagnosticsSoftware LDS may beblocked by the firewall.

The UDP port should be enabled by a system administrator.

XX In Windows > Control panel > Firewall, enable the UDP port 20034.
The network address of the PC is notwithin the range of the ScanFieldMonitor
SFM.

The IP address should be entered by a system administrator.

XX In Windows > Control panel >Network and Sharing Center, set
the PC to DHCP (obtain IP address
automatically).
If several Ethernet cards or a USB3-toEthernet card are installed in the PC,
the connection between device andLaserDiagnosticsSoftware LDS may beblocked by the selection of the wrong
Ethernet card.
1.

Select the appropriate Ethernet cardin the Connections > All window:
The device is displayed in the Connections window

2.

Click on the device.

3.

Click on the Connect to device button.

34

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

16.4

General procedure for measuring

This chapter describes in general which steps are necessary to perform measurements after connecting yourdevice to the LaserDiagnosticsSoftware LDS and what you should pay attention to. Read this general information before you turn to the following chapters on the different measurement tasks.
16.4.1

Open the Device control menu

Immediately after connecting the device, open the Device control menu:
1.

Click on the Devices tab.

2.

Click on ScanFieldMonitor SFM.
The Device control menu with themeasuring modes is opened.

ScanFieldMonitor SFM
Measuring modes

16.4.2

Select measuring mode

Select the measuring mode for your desired measuring task. You will find the Measuring modes in the
Device control menu. In a measuring mode, all relevant setting options for a measuring task are clearlyarranged in a menu.
XX Click on the button of the desired
measuring mode, e.g. Expert.
The Settings and Advanced tabs are
displayed for the selected measurement mode.

After selecting a measuring mode
for the first time, you can switch toanother measuring mode at any timeusing the drop-down list in the upper
section of the Device control menu,
e.g. from Expert to Single vector.

Drop-down list Measuring mode

Revision 01 EN - 05/2021

35

35,0(616.4.3

ScanFieldMonitor SFM

Configuring and saving measurement settings

After selecting a measurement mode, you can configure numerous measurement and device settings in
the Settings and Advanced tabs of the Device Control menu. All available options and settings for SFM
measurements will be described in the following chapters on every different measuring task. However, some
operating steps in the Device control menu apply equally to all measuring modes. They are described in thefollowing overview.
When configuring settings, especially in the Expert measuring mode, note that they are also applied in theother measuring modes.
When saving/loading a configuration, note that you call up the command from a specific measuring mode. At
the same time, however, the saved/loaded data set also contains the settings of the other measuring modes.
Entering and activating parameters
Accept an entered parameter value into
the active configuration in the Device
control menu. Confirm it with the enter
key or by clicking outside the input field.
1.

Enter the desired value in the parameter field.
The background color of the parameter field changes to blue.

2.

Confirm the input by pressing theEnter key or click outside the input
field.
The parameter field will return to its
original background color.

Save a configuration to a file/load from a file
All options marked with an asterisk in the
Device Control menu can be saved to/loaded from a preset file with the .preextension.
XX To save a configuration, click on theicon.
XX To load a configuration, click on the
icon
.

36

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16.5

35,0(6

Performing automatic determination of the trigger amplification

To determine the optimum trigger amplification, the trigger amplification is automatically determined once in
the Auto. Trigger Amplification measuring mode.
In general, the trigger amplification to be selected depends on the laser power and the angle of incidence,
i.e. on the position of the ScanFieldMonitor SFM within the scan field. If you change one of these parameters,
you should determine the trigger amplification again.
16.5.1

Procedure for automated setting of the trigger diodeThe following overview gives a short description of the procedure. This can also be found in theLaserDiagnosticsSoftware LDS menu Auto. Trigger amplification > Device control > Settings: Instructions.
Programming of the laser• For the automatic trigger adjustment the laser must be switched on for ≥ 0,5 seconds.
• We recommend switching on the laser at a steady position within the SFM measurement window.
• For the automatic trigger adjustment a vector can also be moved with low speed within the SFM measurement window. The laser does not necessarily have to pass the scattering structure.
Example: vector length L = 10.0 mm; scanner speed v = 20 mm/s
LDS settings• Choose measurement mode “Auto. Trigger Amplification”.
• The measurement duration is automatically set to 1 s.
• We recommend initially setting the trigger amplification to 0 dB.
• The signal amplification and z-position cannot be set, as these values do not affect the trigger amplification.
• For further analysis, the wavelength λ, the laser power P and the position on the building platform can be
set in the advanced settings section.
• Start measurement.
Data analysis in the LDS• The result of the automatic trigger adjustment is stored in “Auto. Trigger Amplification” in the project tree.
• Display the determined value of the trigger amplification in the table module.
• For subsequent applications we recommend to save the result of the automatic trigger adjustment.
The procedure in the menu of the LaserDiagnosticsSoftware LDS is described in the following chapters.

Revision 01 EN - 05/2021

37

35,0(616.5.2
1.

ScanFieldMonitor SFM

Selecting automatic trigger amplification measuring mode

Connect the device according tochapter 16.3 on page 33 with theLaserDiagnosticsSoftware LDS.
The ScanFieldMonitor SFM is established as a connected device.

2.

Click on ScanFieldMonitor SFM.
The Device control menu opens.

3.

Click the Auto. Trigger amplification
buttonoron the drop-down list Measuringmode and Auto. Trigger amplification.
The corresponding Device control
opens.

16.5.3
1.

ScanFieldMonitor SFM

Drop-down list Measuring mode

Configuring the settings (Device control > Settings)

Click on the Settings tab.

Instructions
Click the Instructions button to get general information about the measurement.
The Measurement time in s is presetto 1 s.
Signal amplification in dB andz-position in mm cannot be set, asthese values have no influence on thetrigger amplification.
2.

38

Set the Trigger amplification in dB
to 0 dB.

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16.5.41.

35,0(6

Configuring the advanced settings (Device control > Advanced)

Click on the Advanced tab.
The Sampling rate in kHz is presetto the minimum value of 1008 kHz.

Specifications of the laser
The specifications for the laser are informative and serve only for the subsequentclassification of the measurement.
2. Enter the used Wavelength in nm of
the laser.
3. Enter the Power P in W during themeasurement.
4. Enter measurement position on thebuilding platform.
The Nominal speed in m/s cannot
be set, as these values have no influence on the trigger amplification.

16.5.5
1.

Starting measurement of the automatic trigger amplification

Follow the safety instructions in chapter 16.1 on page 30.

2. Click on the Start button:
xx The ScanFieldMonitor SFM waits for
15 s for the laser.
3.
•

Switch on the laser:
The laser must be switched on for≥ 0.5 seconds.

Measurement is running
The measurement is performed with themeasurement time of 1 second.
Measurement is finishedThe measurement is finished.

16.5.6

Displaying the determined trigger amplification and transfer to all measuring modes

XX Click on the Settings tab.
The determined value is displayed in
the Trigger amplification in dB input
field and is adopted in all measurement modes.
The trigger amplification can also beentered manually, e.g. from a previous
measurement.

Revision 01 EN - 05/2021

39

35,0(616.5.7

ScanFieldMonitor SFM

Displaying the determined trigger amplification in the project tree

For documentation purposes, the determined trigger amplification is saved in the
project tree.
1. Click on the Projects tab:xx The determined trigger amplification islisted in the file structure.
XX For information on project management, please refer to the separate
LaserDiagnosticsSoftware LDS operating manual.
2.

Click on the Results Table tool.

3.

Drag and drop the Auto. Trigger
amplification from the measurement
to the Results Table.

4.

Click the gear icon and select the
Trigger amplification selection.
The Results Table displays the measured Trigger amplification in dB.

40

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

16.6

Basic settings for all measuring modes

16.6.1

Selecting the measuring mode Expert

1.

Connect the device according tochapter 16.3 on page 33 with theLaserDiagnosticsSoftware LDS.
The ScanFieldMonitor SFM is established as a connected device.

2.

Click on ScanFieldMonitor SFM.
The Device control menu opens.

3.

Click on the Expert buttonoron the drop-down list Measuringmode and Expert.
The corresponding Device control
opens.

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

Drop-down list Measuring mode

41

35,0(616.6.2

ScanFieldMonitor SFM

Configuring the settings (Device control > Settings)

1.

Click on the Settings tab.

2.

Enter the Measurement time in s.

Signal amplification
3. Enter the Signal amplification in dB:• The signal amplification is designed
to avoid overdriving the detector
and to reduce the measured signal
amplitude (see also chapter 16.7.6 on
page 49).
• By activating the checkbox autom.
Gain, the signal amplification is
automatically adjusted to the optimal
signal amplitude with each measurement.
Trigger amplification
The value obtained from the measurement of the automatic trigger amplification is displayed in the Trigger
amplification in dB input field.
The trigger amplification can also beentered manually, e.g. from a previous
measurement.
4.

42Enter the z-Position in mm according to your machine coordinate
system.

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16.6.3

Configuring the advanced settings (Device control > Advanced)

1.

Click on the Advanced tab.

2.

Set the desired Sampling rate in
kHz to vary the number of measuring
points:
The sampling rate should be basedon the marking speed.
We recommend:f [MHz] = 0.5 ∙ vmax [m/s].

••

35,0(6Drop-down list Signal and Trigger
detector
3. With the selection you can choose
between signal or trigger detector
measurement recording.
Selection for measured data recording• Triggered: When a measurement
is started with the Start button, the
ScanFieldMonitor SFM is waiting forthe laser for 15 s.
This is the default mode for a
ScanFieldMonitor SFM measurement.
The structure is passed over withthe laser switched on. The laser isswitched off for jumping back to thestart position.
• Monitor: When starting a measurement with the Start button, the measurement is started immediately.
All data recorded during the measurement period are saved.
Specifications of the laser
4. Enter the Wavelength in nm of thelaser in use.
5. Enter the Power P in W during yourmeasurement.
6. Enter the Nominal speed in m/s during your measurement.
Number of measuring positions
The number of measuring positions isshown in the bottom illustration.
7. Enter the number of measuring positions # Meas. positions in x +/- on
the x-axis.
8. Enter the number of measuring positions # Meas. positions in y +/- on
the y-axis.
Distance of the measuring positions
The distance between the measuring
positions is determined by the position of
the device holders on the building platform(see Fig. 12.5 on page 24).
9. Enter the distance delta x in mm on
the x-axis.
10. Enter the distance delta y in mm on
the y-axis.
Continued on the next page

Revision 01 EN - 05/2021

43

35,0(6ScanFieldMonitor SFM

Continuation
Nominal vectors
In the Nominal vectors drop-down
menu, the possible travel distances
are displayed depending on the position on the building platform and the
TCP calibration.
Transformations
You can view and enter values for coordinate transformations in the Transformations area.
This allows the data measured by the
ScanFieldMonitor SFM to be displayedin the device coordinate system or in an
external coordinate system.
11. Enter the Translation (x,y,z) mm
distances and the Rotation z ° indegrees around the z-axis of thedevice coordinate system to theexternal coordinate system.
12. Select the Use transformations
check box to apply the entereddistances when evaluating all subsequent measurements.
Save transformation parameters
13. Click on the Save transformation todevice button:
xx The entered values of the transformation are saved in the device and arethus also available after a restart ofthe device.
Determine measuring position
14. Use the selection area for documentation. Click on the position where
the ScanFieldMonitor SFM is locatedon the building platform during themeasurement.

44

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

16.7

Performing measurement of a single vector

Please note that some settings are set in the Expert menu according to chapter 16.6 „Basic settings for all
measuring modes“ on page 41.
16.7.1
1.

Selecting the measuring mode Single vector

Connect the device according tochapter 16.3 on page 33 with theLaserDiagnosticsSoftware LDS.
The ScanFieldMonitor SFM is established as a connected device.

2.

Click on the ScanFieldMonitor SFM.
The Device control menu opens.

3.

Click on the Single vector buttonoron the drop-down list measurementmode and Single vector.
The corresponding Device control
opens.

16.7.2

ScanFieldMonitor SFM

Drop-down list Measuring mode

Configuring the settings (Device control > Settings)

1.

Click on the Settings tab.

2.

Enter the Measurement time in s.

Signal amplification
3. Enter the Signal amplification in dB:• The signal amplification is designed
to avoid overdriving the detector
and to reduce the measured signal
amplitude (see also chapter 16.7.6 on
page 49).
• By activating the checkbox autom.
Gain, the signal amplification is
automatically adjusted to the optimal
signal amplitude with each measurement.
Trigger amplification
The value obtained from the measurement of the automatic trigger amplification is displayed in the Trigger
amplification in dB input field.
The trigger amplification can also beentered manually, e.g. from a previous
measurement.
4.

Enter the z-Position in mm according to your machine coordinate
system.

Revision 01 EN - 05/2021

45

35,0(616.7.3

Configuring the advanced settings (Device control > Advanced)

1.

Click on the Advanced tab.

2.

Set the desired Sampling rate in
kHz to vary the number of measuring
points:
The sampling rate should be basedon the marking speed.
We recommend:f [MHz] = 0.5 ∙ vmax [m/s].

••

ScanFieldMonitor SFM

Specifications of the laser
3. Enter the Wavelength in nm of thelaser in use.
4. Enter the Power P in W during yourmeasurement.
5. Enter the Nominal speed in m/s during your measurement.
Determine measuring position
6. Use the selection area for documentation. Click on the position where
the ScanFieldMonitor SFM is locatedon the building platform during themeasurement.

16.7.4
1.

Starting a single vector measurement

Follow the safety instructions in chapter 16.1 on page 30.

2. Click on the Start button:
xx The ScanFieldMonitor SFM is waiting
for the laser for 15 s.
3.

Switch on the laser / start marking avector.

Measurement is running
The measurement is performed with theselected measurement time.
Measurement is finishedThe measurement is finished.
Vector direction
The vector direction of the measured
beams is automatically detected. Thus,
beams can be measured in all directions(x, y, -x, -y) simultaneously (see also chapter 16.7.5 on page 47).

46

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16.7.535,0(6

Displaying single vector measurement result

1. Click on the Projects tab:xx All measurements are listed in the filestructure.
XX For information on project management, please refer to the separate
LaserDiagnosticsSoftware LDS operating manual.
2.

Right-click on the measurement or
measurements to be displayed.

3. Click on the selection Show:
xx The selected measurement is displayed in the SFM Analysis tool.
As an alternative, you can click on the
SFM Analysis tool in the toolbench.
4.

Drag and drop one or more selected
vectors into the SFM Analysis tool.

xx In the Results tab, the measured values and the vector direction are displayed.

Revision 01 EN - 05/2021

47

35,0(6ScanFieldMonitor SFM

The vector direction of the measured beams is automatically detected.
Thus, beams can be measured in all directions (x, y, -x, -y) simultaneously.
5.
•

Click on the Fit tab.
The first and last light blue peaks are used to determine the vector direction.

6.
••

Click on the First peak tab:Here you can find detailed information about the first peak.
The Gaussian fit over the first peak is the basis for the measured value wx/wy.

48

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

16.7.6

Displaying measurement errors in the LaserDiagnosticsSoftware LDS

1. Click on the Projects tab:xx All measurements are listed in the file structure.
• If the point in front of the measured vector is red, this indicates an incorrect measurement.
2.
xx
•
•

Position the mouse over the red dot:
An information about the measurement error is displayed.
In the example shown, the measurement is invalid due to an overload of the signal.
Looking at the raw measurement data can provide a clue for the cause of the error.

3.
4.
•
•
•
5.

Click on the Graph tool.
Drag and drop the measurement result from the project tree into the Graph tool:
Check if all six peaks are visible and no peaks overlap or are cut off.
You can estimate the level of the necessary adjustment of the signal amplification on basis of the amplitudes.
The maximum value of the graph shall be between 40 000 cts and 60 000 cts.
Set the signal amplification in dB in the menu Device control > Settings (see chapter 16.7.2 on page 45).
Signal overloaded

Signal correct

Revision 01 EN - 05/2021

49

35,0(616.8

ScanFieldMonitor SFM

Performing measurement of a caustic

Please note that some settings are set in the Expert menu according to chapter 16.6 „Basic settings for all
measuring modes“ on page 41.
16.8.1

Procedure for measuring a caustic

The following overview gives a short description of the procedure. This can also be found in theLaserDiagnosticsSoftware LDS menu Caustic > Device control > Settings: Instructions.
Programming of vectors and measurement procedure• A vector is measured at one single building platform position for different z-positions.
• It is possible to measure vectors in x- and y-direction in one measurement sequence.
• The marking settings for the vectors must be kept the same for the whole measurement sequence.
• It is possible to increase the overall statistical significance of the measurement result by repeating vectors.
• For a reliable analysis it is recommended to measure at least 21 different z-planes, covering a range of+/- 3 zR around the focal position at z0.
• In measurement positions with large beam incidence angles the vector might leave the scattering structure for certain z-positions, which limits the maximum z-range for this position.
LDS settings• The measurement duration must be longer than the sequence’s marking time.
• Check positioning and photo diode gain with a single test measurement.
• Enter the z-position for the first plane measured.
• Enter the step size in z-direction and the number of measurement planes.
• “Interval between measurements” is a waiting duration between the end of one measurement and thestart of the measurement in the next z-plane• By checking “Confirm next measurement” this waiting time is ignored and the measurement in the next
plane must be started manually.
• In the advanced settings section, the sampling rate, the wavelength λ, and the nominal velocity vnom areentered. The sampling rate should be chosen based on the marking speed used.
We recommend: f [MHz] = 0.5 * vmax [m/s].
• For further analysis enter laser power P and measurement position on the building platform.
• Start measurement.
• For analysis all vectors belonging to the caustic measurement must be saved in the same measurement
sequence.
Data analysis in the LDS• Open measurement sequence with the “SFM caustic” tool.
• Caustic measurements for different building platform positions can be opened in the same tool.
The procedure in the menu of the LaserDiagnosticsSoftware LDS is described in the following chapters.

50

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

16.8.2
1.

Selecting the measuring mode Caustic

Connect the device according tochapter 16.3 on page 33 with theLaserDiagnosticsSoftware LDS.
The ScanFieldMonitor SFM is established as a connected device.

2.

Click on the ScanFieldMonitor SFM.
The Device control menu opens.

3.

Click on the Caustic buttonoron the drop-down list measurementmode and Caustic.

ScanFieldMonitor SFM

The corresponding Device control
opens.
Drop-down list Measuring mode

16.8.3
1.

Configuring the settings (Device control > Settings)

Click on the Settings tab.

Instructions
Click the Instructions button to get general information about the measurement.
2.
•Enter the Measurement time in s.
The measurement duration must be
longer than the sequence’s marking
time.

Signal amplification
3. Enter the Signal amplification in dB:• The signal amplification is designed
to avoid overdriving the detector
and to reduce the measured signal
amplitude (see also chapter 16.7.6 on
page 49).
• By activating the checkbox autom.
Gain, the signal amplification is
automatically adjusted to the optimal
signal amplitude with each measurement.
Trigger amplification
The value obtained from the measurement of the automatic trigger amplification is displayed in the Trigger
amplification in dB input field.
The trigger amplification can also beentered manually, e.g. from a previous
measurement.
Continued on the next page

Revision 01 EN - 05/2021

51

35,0(6ScanFieldMonitor SFM

Continuation
4.

Enter the z-position in mm according
to your machine coordinate system.

5.
•Enter the z increment in mm:
This corresponds to the distance on
the z-axis until the next measurement.
The step size can be both positive
and negative.

6.

Enter the Number of measurements:
For a reliable analysis it is recommended to measure at least 21 different z-planes, covering a range of +/3 zR around the focal position at z0.

•

7.
•

8.
•

52

Enter the Interval between measurements in s:
This input corresponds to a waiting
duration between the end of one
measurement and the start of themeasurement in the next z-plane.
Activate the Confirm next measurement check box to ignore the automatic start of the next measurement:
The next measurement needs to be
started manually.

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16.8.4

Configuring the advanced settings (Device control > Advanced)

1.

Click on the Advanced tab.

2.

Set the desired Sampling rate in
kHz to vary the number of measuring
points:
The sampling rate should be basedon the marking speed.
We recommend:f [MHz] = 0.5 ∙ vmax [m/s].

••

35,0(6

Specifications of the laser
For a complete evaluation of the caustics,
the following values must be entered:
3. Enter the Wavelength in nm of thelaser in use.
4. Enter the Power P in W during yourmeasurement.
5. Enter the Nominal speed in m/s during your measurement.
Nominal vectors
In the Nominal vectors drop-down
menu, the possible travel distances
are displayed depending on the position on the building platform and the
TCP calibration.
Determine measuring position
6. Use the selection area for documentation. Click on the position where
the ScanFieldMonitor SFM is locatedon the building platform during themeasurement.

Revision 01 EN - 05/2021

53

35,0(616.8.5
1.

ScanFieldMonitor SFM

Starting a caustic measurement

Follow the safety instructions in chapter 16.1 on page 30.

2. Click on the Start button:
xx The ScanFieldMonitor SFM is waiting
for the laser for 15 s.
3.

Switch on the laser / start marking avector.

Measurement is running
The measurement is performed with theselected measurement time.
Measurement finishedThe measurement is finished.
Vector direction
The vector direction of the measured
beams is automatically detected. Thus,
beams can be measured in all directions(x, y, -x, -y) simultaneously (see also chapter 16.7.5 on page 47).
The results are displayed separately in xand y-direction.
Note
To improve the statistical evaluation, several vectors with identical parameters canbe measured.
4.
5.

Adjust the height of the building platform after the first measurement.
With the input of the z-positionin mm, the new z-position is
automatically stored for the
next measuring position in theLaserDiagnosticsSoftware LDS.

Next measurement
By selecting Interval between measurements in s the next measurement will
start automatically.
With the selection Confirm next measurement the next measurement must be
confirmed manually.
Signal amplification
The signal amplification is designed to
avoid overdriving the detector and to
reduce the measured signal amplitude(see also chapter 16.7.6 on page 49).
By activating the checkbox autom. Gain,the signal amplification is automaticallyadjusted to the optimal signal amplitudewith each measurement.
Only if the Confirm next measurement
check box is activated
6. Click on the OK button.
xx The next measurement is started.

54

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16.8.635,0(6

Displaying the measurement results

1. Click on the Projects tab:xx The caustic and all of its single vectors are listed in the file structure.
XX For information on project management, please refer to the separate
LaserDiagnosticsSoftware LDS operating manual.
2.

Right click on the complete caustic
sequence to be displayed.

3. Click on the selection Show:
xx The selected measurement is displayed in the SFM Caustic tool.
As an alternative, you can click on the
SFM Caustic tool in the toolbench.
4.

Drag and drop the complete caustic
sequence into the SFM Caustic tool(see figure on the next page).

Algorithms for evaluating the beam geometry
The ScanFieldMonitor SFM with the possibility to measure laser beams with an angle of incidence of +/- 20 °is a special feature in the field of laser beam characterization, which is usually limited to the vertical beamincidence. In doing so, it must be considered how the laser beam is imaged by the device.
The ScanFieldMonitor SFM is designed with the scattering structure parallel to the base plate. This meansthat the inclined incidence of the laser deforms the beam geometry on the glass surface. This form of projection images a round intensity profile along the propagation axis of the laser elliptically on the device surface.
This applies equally to the surface of the ScanFieldMonitor SFM and to the scattering structure.
A characterization according to the standard is only possible in the strict sense for vertical beam incidence.
For inclined beam incidence, the measured beam geometry always represents a projection at the current
angle of incidence. As a consequence, beam diameters are determined too large along the tilted axis. Note,that this projection can also apply to the laser process if it is influenced by the angle of incidence of thebeam. For this reason, the LaserDiagnosticsSoftware LDS also offers two evaluation methods.

Revision 01 EN - 05/2021

55

35,0(6ScanFieldMonitor SFM

Caustic
The caustic is shown on the basis of the measured radii in combination with the measured scanner speeds.
The corresponding caustic parameters are given in the result table. All values reflect the geometry of the laser
as a projection on a surface, parallel to the base surface. The beam looks exactly the same in the processing
plane of a laser system.

The position of the nominal speed zv in mm indicates at which z-position the expected/specified nominal
speed was determined by the ScanFieldMonitor SFM.

56

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

35,0(6

Corrected caustic
With the caustic measurement, the angle of incidence of the laser to the ScanFieldMonitor SFM is determined at the same time. Taking the angle of incidence into account, the beam radii and their z-positions arecorrected by calculation as if they were recorded perpendicular to the beam direction. The focus position
serves as a reference and remains constant. The rayleigh length, the divergence angle, the beam quality
factor M² and the beam parameter product BPP can vary as a result of the correction. The option “Correctedcaustic” thus enables an evaluation of the caustic measurement according to the standard.

Note on beam position (beam displacement)
Due to the inclined beam incidence, the laser at the protective glass of the ScanFieldMonitor SFM is subject
to a parallel offset. In the process of the caustic measurement, the angle of incidence of the laser is determined. The resulting beam displacement on the scattering structure is indicated in the measurement result of
the caustic measurement as displacement in x and y.

Revision 01 EN - 05/2021

57

35,0(616.9

ScanFieldMonitor SFM

Performing measurement of the delay time (laser on and laser off delay)

Please note that some settings are set in the Expert menu according to chapter 16.6 „Basic settings for all
measuring modes“ on page 41.
16.9.1

Procedure for measuring the delay time

The following overview gives a short description of the procedure. This can also be found in theLaserDiagnosticsSoftware LDS in the menu Delay time > Device control > Settings: Instructions.
Programming of vectors• Measurement of multiple vectors of identical length, orientation and delay time at different marking
speeds.
• For a reliable analysis at least five different marking speeds should be measured.
• It is possible to increase the overall statistical significance of the measurement result by repeating vectors.
• The vectors (different marking speeds and repetitions) can be measured separately or in one measurement sequence.
• Measuring in a plane close to the focal plane is recommended but not strictly necessary.
LDS settings• The measurement duration must be longer than the sequence’s marking time.
• Check positioning and photo diode gain with a single test measurement.
• Enter the sampling rate in the advanced settings section. The sampling rate should be chosen based on
the highest marking speed used. We recommend: f [MHz] = 0.5 * vmax [m/s].
• For further analysis enter wavelength λ, laser power P and plane position z and the measurement position on the building platform.
• Start measurement.
• For analysis all vectors belonging to the delay time measurement must be saved in the same measurement sequence.
Data analysis in the LDS• Open measurement sequence with the “SFM delay time” tool.
The procedure in the menu of the LaserDiagnosticsSoftware LDS is described in the following chapters.

58

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

16.9.2
1.

Selecting the measuring mode Delay time

Connect the device according tochapter 16.3 on page 33 with theLaserDiagnosticsSoftware LDS.
The ScanFieldMonitor SFM is established as a connected device.

2.

Click on the ScanFieldMonitor SFM.
The Device control menu opens.

3.

Click on the Delay time buttonoron the drop-down list measurementmode and Delay time.
The corresponding Device control
opens.

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

Drop-down list Measuring mode59

35,0(616.9.3
1.

ScanFieldMonitor SFM

Configuring the settings (Device control > Settings)

Click on the Settings tab.

Instructions
Click the Instructions button to get general information about the measurement.
Note
For a delay time measurement, several
identical vectors with different speeds
must be written.
2.
•Enter the Measurement time in s.
The measurement duration must be
longer than the sequence’s marking
time.

Signal amplification
3. Enter the Signal amplification in dB:• The signal amplification is designed
to avoid overdriving the detector
and to reduce the measured signal
amplitude (see also chapter 16.7.6 on
page 49).
• By activating the checkbox autom.
Gain, the signal amplification is
automatically adjusted to the optimal
signal amplitude with each measurement.
Trigger amplification
The value obtained from the measurement of the automatic trigger amplification is displayed in the Trigger
amplification in dB input field.
The trigger amplification can also beentered manually, e.g. from a previous
measurement.
4.

60Enter the z-Position in mm according to your machine coordinate
system.

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16.9.4

Configuring the advanced settings (Device control > Advanced)

1.

Click on the Advanced tab.

2.

Set the desired Sampling rate in
kHz to vary the number of measuring
points:
The sampling rate should be basedon the marking speed.
We recommend:f [MHz] = 0.5 ∙ vmax [m/s].

••

35,0(6

Specifications of the laser
The following entries are informative anddo not influence the measurement of thedelay time.
3. Enter the Wavelength in nm of thelaser in use.
4. Enter the Power P in W during yourmeasurement.
Nominal vectors
In the Nominal vectors drop-down
menu, the possible travel distances
are displayed depending on the position on the building platform and the
TCP calibration.
Determine measuring position
5. Use the selection area for documentation. Click on the position where
the ScanFieldMonitor SFM is locatedon the building platform during themeasurement.

Revision 01 EN - 05/2021

61

35,0(616.9.5
1.

ScanFieldMonitor SFM

Starting a delay time measurement

Follow the safety instructions in chapter 16.1 on page 30.

2. Click on the Start button:
xx The ScanFieldMonitor SFM is waiting
for the laser for 15 s.
3.

Switch on the laser / start marking avector.

Measurement is running
The measurement is performed with theselected measurement time.
Measurement finishedThe measurement is finished.
Vector direction
The vector direction of the measured
beams is automatically detected. Thus,
beams can be measured in all directions(x, y, -x, -y) simultaneously (see also chapter 16.7.5 on page 47).
The delay time results for each direction
are displayed separately.
When measuring in all four directions,four results for all directions are displayed
accordingly.

62

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

16.9.635,0(6

Displaying the measurement results

1. Click on the Projects tab:xx The delay time measurement and allof its single vectors are listed in thefile structure.
XX For information on project management, please refer to the separate
LaserDiagnosticsSoftware LDS operating manual.
2.

Right click on the complete Delay
Time sequence to be displayed.

3. Click on the selection Show:
xx The selected measurement is displayed in the Delay Time tool.
As an alternative, you can click on the
Delay Time tool in the toolbench.
4.

Drag and drop the complete Delay
Time sequence into the Delay Time
tool.

Revision 01 EN - 05/2021

63

35,0(617

ScanFieldMonitor SFM

Discussion of the measuring results and error analysis

For the correct interpretation of the measured values and the evaluation of the calculated results, the specificcharacteristics of the ScanFieldMonitor SFM must be taken into account.
The LaserDiagnosticsSoftware LDS uses the Gaussian fit method for radius determination by default.
Gaussian fit method
The measuring signal of the ScanFieldMonitor SFM consists of the time track of the photodiode. The characteristic six peaks are generated when the laser passes over the lines of the scattering structure. This meansthat a one-dimensional integrated measurement signal is generated. The beam radius is calculated using a
Gaussian fit to this power density distribution. This method provides valid results exclusively for the observation of Gaussian laser beams.
Beam position in the measuring window
If the laser is incident at an angle, the protective window above the scattering structure causes a beam shift.
The position of the measured vector is thus subject to an offset. By measuring a caustic, the exact angle ofincidence, the resulting beam shift in both directions and the corrected beam parameters can be determined.
Constant marking speed
A constant marking speed of the laser is assumed for the calculation of all measured variables. Acceleration
and/or deceleration within the written vector influence the value and accuracy of all measured variables.
Contaminated protective window
Contamination, fingerprints and burn-ins on the protective window can cause additional stray light. If thisstray light is misinterpreted as a measurement signal, this will lead to incorrect results.
Fluctuations of the laser power
The detector of the ScanFieldMonitor SFM can resolve laser power fluctuations in the range of several
10 kHz, especially at low marking speeds. Therefore, the beam distribution sometimes appears unstable,
which can also influence the measurement accuracy of all measured variables.

64

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

18

Troubleshooting

Error

Possible cause

RemedyThere is no connection between the
ScanFieldMonitor SFM
and the PC.

Network address of the PC
is not within the range of the
ScanFieldMonitor SFM.

In Windows > Control panel > Network and Sharing Center, set the PC to DHCP (obtain IP address
automatically).

The connection may be blocked
by the firewall.

Enable the UDP port 20034 according to chapter
16.3.2 on page 34.

An incorrect Ethernet card isselected.

Select the appropriate Ethernet card according tochapter 16.3.2 on page 34.

•
•

1.
2.

Error during ameasurement•

Apart from the ambient
noise and zero offset,
no measuring signal isavailable.

Data transmission error
Processor crash in themeasuring system
Program execution error

3.
4.

Restart the LaserDiagnosticsSoftware LDS.
Disconnect the Ethernet or WLAN connection andreconnect the device to the PC.
Restart the PC.
Turn the ScanFieldMonitor SFM off and on again.
Disconnect the Ethernet or WLAN connection andreconnect the device to the PC.

The device is not aligned correctly.

Check the device alignment to the laser beam according to chapter 12.2 on page 20.

The power density is too low.

Increase the laser power.

The signal amplification is too
low.

Set the maximum signal amplification.

No vector is written during a triggered measurement.

The trigger amplification is too
low.

Set the maximum trigger amplification or perform an
automatic determination of the trigger amplificationaccording to chapter 16.5 on page 37.

The measurement signalof a vector contains lessthan six peaks.

The device is not aligned correctly.

Check the device alignment to the laser beam according to chapter 12.2 on page 20.

The measurement signalof a vector contains
more than six peaks.

The protective window is contaminated.

Clean or replace the protective window.

Tab. 18.1:

Troubleshooting

Revision 01 EN - 05/2021

65

35,0(619

ScanFieldMonitor SFM

Maintenance and service

The operator is responsible for determining the maintenance intervals for the measuring device.
PRIMES recommends a maintenance interval of 12 months for inspection and validation.
If the device is used only sporadically, the maintenance interval can also be extended up to 24 months.

19.1

Exchanging the protective window on the device

The protective window in the beam entrance is a wearing part and can be replaced if necessary. Low levelsof contamination of the protective window can be removed carefully with Isopropanol when cooled down(observe the manufacturer‘s safety instructions). In case of heavy, non-removable contamination or damage,the protective window must be replaced with a new one.
The protective window is coated with an antireflection coating and has low reflection values in thespecified wavelength range of less than 1 %. To avoid increased reflection values, use only original
PRIMES protective windows.
Protective window for ScanFieldMonitor SFM
Protective window diameter 30 mm
Glass thickness		
1.5 mmOrder number		
801-004-054 (1 piece); 410-011-022 (10 pieces)Protective window spacer
Protective window diameter 55 mm
Glass thickness		
1.5 mmOrder number		
801-001-023 (1 piece)

66

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

19.1.135,0(6

Safety instructions

DANGER
Severe eye or skin injury due to laser radiation
If the protective window is not correctly positioned, reflections can cause directional laser
radiation.
X Ensure that the new protective window is positioned evenly in the indentation.

CAUTION
Hot surface – risk of burns
The device and the protective window are hot after a measurement.
X Do not replace the protective window directly after a measurement.
X Let the device cool down for an adequate period of time. The cooling time varies dependingon the laser power and the irradiation time.

NOTICE
Damage/Destruction of the device or the laser system
Contamination and fingerprints on the protective window can lead to damage or shatteringor splintering of the protective window during measuring operation. Parts of the protective
window can get into the laser system and damage it.
X Only replace the protective window in a dust-free environment.
X Do not touch the protective window with your bare hands.
X When exchanging the protective window wear powder-free latex gloves.

Revision 01 EN - 05/2021

67

35,0(619.1.2
1.
2.
3.
4.
5.

ScanFieldMonitor SFM

Exchanging the protective window on ScanFieldMonitor SFM and check O-ring

Observe the safety instructions in chapter 19.1.1 on page 67.
Unscrew the 5 Torx screws M2 x 3 mm (Torx 6 screwdriver) at the protective window holder.
Put on powder-free latex gloves.
Carefully remove the protective window holder upwards.
Remove the old protective window from the ScanFieldMonitor SFM and dispose it. Use a suction cup to
remove the protective window.

6. If there is visible wear, remove the temperature-resistant O-ring from the indentation.
7. Insert a new temperature-resistant O-ring into the indentation.
8. Check the optical components for contamination.
9. Insert the new protective window into the ScanFieldMonitor SFM. Make sure that the protective window
is flat in the indentation.
10. Place the protective window holder.
11. Tighten the protective window holder with 5 Torx screws M2 x 3 mm.
12. Check for secure fit of the protective window holder. The protective window holder must lie flat against
the housing of the ScanFieldMonitor SFM.

Torx screws
M2 x 3 mmProtective windowholderProtective
window
O-RingIndentation

Fig. 19.1:

68

Exchanging the protective window on the ScanFieldMonitor SFM

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

19.1.3
1.
2.
3.
4.
5.

Exchanging the protective window on the protective window spacer and check O-ring

Observe the safety instructions in chapter 19.1.1 on page 67.
Unscrew the 4 Torx screws M3 x 6 mm (Torx 10 screwdriver) at the protective window holder.
Put on powder-free latex gloves.
Carefully remove the protective window holder upwards.
Remove the old protective window from the protective window spacer and dispose it. Use a suction cup
to remove the protective window.

6. If there is visible wear, remove the temperature-resistant O-ring from the indentation.
7. Insert a new temperature-resistant O-ring into the indentation.
8. Check the optical components for contamination.
9. Insert the new protective window into the protective window spacer. Make sure that the protective window is flat in the indentation.
10. Place the protective window holder.
11. Tighten the protective window holder with 4 Torx screws M3 x 6 mm.
12. Check for secure fit of the protective window holder. The protective window holder must lie flat against
the housing of the protective window spacer.

Torx screws
M3 x 6 mmProtective windowholderProtective
window
O-RingIndentation

Protective window
spacerFig. 19.2:

Exchanging the protective window on the protective window spacer and check the O-ring

Revision 01 EN - 05/2021

69

35,0(620

ScanFieldMonitor SFM

Measures for the product disposal

PRIMES gives you the opportunity to return your PRIMES measuring device for free disposal within thescope of the Waste of Electrical and Electronic Equipment (WEEE Directive). You can send PRIMES measuring devices to be disposed of within the EU (this service does not include shipping costs) to our address:
PRIMES GmbH
Max-Planck-Str. 264319 Pfungstadt
Germany
If you are located outside the EU, please contact your local PRIMES distributor to discuss the disposal procedure for your PRIMES measuring device.
PRIMES is a registered manufacturer in the German “Used Appliances Register“ stiftung elektro-altgeräte
register (stiftung ear) with the number WEEE-reg.-no. DE65549202.

70

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

2135,0(6

Declaration of conformity

Revision 01 EN - 05/2021

71

35,0(622

ScanFieldMonitor SFM

Technical data

Measurement parameters
Power range

10 – 1 500 W

Wavelength range

1 000 – 1 100 nm

Beam diameter

50 – 500 µm

Max. power density (1 000 – 1 100 nm)

100 MW/cm²

Determined parameters
Focus position x, y, z

yes

Focus radius x, yyesBeam quality factor M²

yes

Beam parameter product BPP

yes

Divergence angle

yesMarking speed

yes

Focus shift in z

yes

Angle of incidence

yes

Delay time

yes

Device parameters
Angle of incidence perpendicular to inlet aperture0 – 20 degreeMarking speed

0.1 – 10 m/s

Dimension of the scattering structure

7.5 mm x 7.5 mm

Supply data
Power supply

Lithium-ion battery (power bank)

Output voltage power bank

Adjustable 12 V, 15 V, 16.5 V, 19 V, 20 V, 24 V

Operating voltage of the ScanFieldMonitor SFM

12 V

Capacity

20 100 mAh

Energy73 Wh

Weight power bank

515 g

Dimensions power bank (L x W x H)

168.5 x 80 x 23.2 mm

Shipping classification of the processing unit with inserted or
permanently installed power bankLithium ion batteries contained in equipment

Shipping classification of the separate power bankLithium ion batteries with equipment

Temperature range for charging the power bank0 – 45 °C

Communication
Interfaces

72

Ethernet, WLAN

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

Dimensions and weight
Dimensions (L x W x H)

Weight (ca.)

ScanFieldMonitor SFM

80 x 80 x 100 mm

Protective window
spacer65 x 65 x 40 mm

Processing Unit

275 x 160 x 100 mm

ScanFieldMonitor SFM

1.2 kgDevice holder

0.8 kgProcessing Unit

3.2 kgScanFieldMonitor SFM

10 – 45 °C

Processing Unit

10 – 45 °C

ScanFieldMonitor SFM

10 – 45 °C

Processing Unit

10 – 45 °C

Environmental conditions
Operating temperature range

Storage temperature range

Reference temperature

22 °C

Permissible relative humidity (non-condensing)

10 – 80 %Revision 01 EN - 05/2021

73

35,0(6ScanFieldMonitor SFM

23

Dimensions

23.1

ScanFieldMonitor SFM
81.5
80

41.5

100

83.3
80

41.5

74

Revision 01 EN - 05/2021

35,0(6ScanFieldMonitor SFM

23.2

ScanFieldMonitor SFM with protective window spacer
83.3

81.5
80

41.5

140

80

41.5

Revision 01 EN - 05/2021

75

35,0(623.3

ScanFieldMonitor SFM

Device holder
100

82

20
10

100

82

23.4

Processing Unit
260

101

160

325

76

Revision 01 EN - 05/2021

ScanFieldMonitor SFM

24

Appendix

24.1

Patent notice35,0(6PRIMES is the owner of US patent 10,184,828 which protects a method for determining properties of alaser beam. The ScanFieldMonitor SFM is a sophisticated tool that makes it easier for you to implement thismethod.

24.2

GNU GPL license notice

The software of this product contains software code that is licensed subject to the GNU General Public
License (GPL) Version 2 or later. The license terms of the GNU GPL Version 2 or later are available on thefollowing websites:• https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html• https://www.gnu.org/licenses/licenses.en.html

Revision 01 EN - 05/2021

77