Primes ScanFieldMonitor SFM User manual

ScanFieldMonitor SFM
LaserDiagnosticsSoftware LDS
35,0(6
Revision 01 EN - 05/2021
Original Instructions

ScanFieldMonitor SFM 35,0(6
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IMPORTANT!
READ CAREFULLY BEFORE USE.
KEEP FOR FUTURE USE.

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Table of contents
1 Basic safety instructions 8
2 Symbols and conventions 9
3 About this operating manual 10
4 Conditions at the installation site 10
5 Important notes on the lithium-ion battery (power bank) 11
5.1 Charge the power bank...........................................................................................................11
5.2 Store the power bank..............................................................................................................11
5.3 Dangers to health and the environment in the event of damage to the power bank .................11
5.4 Shipping the power bank ........................................................................................................11
6 Device description 12
6.1 Functional description .............................................................................................................12
6.2 Measuring principle .................................................................................................................13
7 Quick overview installation 14
8 Install/uninstall plugin 15
9 Transport 16
10 Charge the power bank 16
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.....................................22
12.2.3 Aligning the ScanFieldMonitor SFM with protective window spacer using the
alignment 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 the
laser system 29
15.1 Positioning the ScanFieldMonitor SFM and Processing Unit ....................................................29
15.2 Removing the ScanFieldMonitor SFM from the building platform ............................................29

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16 Measuring 30
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 and
check O-ring.............................................................................................................69
20 Measures for the product disposal 70
21 Declaration of conformity 71

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22 Technical data 72
23 Dimensions 74
23.1 ScanFieldMonitor SFM ............................................................................................................74
23.2 ScanFieldMonitor SFM with protective window spacer............................................................75
23.3 Device holder ..........................................................................................................................76
23.4 Processing Unit.......................................................................................................................76
24 Appendix 77
24.1 Patent notice...........................................................................................................................77
24.2 GNU GPL license notice..........................................................................................................77

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PRIMES - The Company
PRIMES manufactures measuring devices used to analyze laser beams. These devices are employed for
the diagnostics of high-power lasers ranging from CO2lasers and solid-state lasers to diode lasers. A wave-
length range from infrared through to near UV is covered, offering a wide variety of measuring devices to
determine 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 our
customers’ requirements quickly and reliably.
PRIMES GmbH
Max-Planck-Str. 2
64319 Pfungstadt
Germany
Tel [phone]
[email protected]
www.primes.de

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1 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 for
your 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 mea-
surement 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 unin-
tentional bumping or pulling on the cables.
• Install safety switches or emergency safety mechanisms that allow the laser to be switched off immedi-
ately.
• 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 the
laser 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 instructed
in the installation and operation of the device and must have a basic understanding of working with high-
power 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.

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Liability disclaimer
Manufacturer and distributor exclude any liability for damages and injuries which are direct or indirect con-
sequences of using the device not as intended or modifying the device or the associated software without
authorization.
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 not
taken.
WARNING
Means that death or serious physical injuries may occur if necessary safety precautions are not
taken.
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 health
and environmental damage, the power bank must be disposed of in accordance with the appli-
cable national and international laws.

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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 irrel-
evant 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 user
interface.
Points to an element described in the text (e.g. an input field) in graphical user interface images.
3 About this operating manual
This documentation describes the installation and configuration of the ScanFieldMonitor SFM and the execu-
tion 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 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.

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5 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 be
pulled out and replaced.
• A Processing Unit with permanently installed power bank. For this Processing Unit the power bank can-
not be removed.
Be aware that this power bank may ignite at high temperatures. For operation, storage and shipping, refer to
the 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 the
power bank. Recharge the power bank when the charge level reaches 20percent. Do not charge the power
bank 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 distance
of 3m from flammable materials. Do not expose the device to direct sunlight. Please recharge the power
bank 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 with
the 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 pro-
duces irritating smoke.
5.4 Shipping the power bank
The Processing Unit with inserted power bank or permanently installed power bank is a dangerous good
in 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 the
requirements for shipping according to the valid regulations.

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6 Device description
6.1 Functional description
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 con-
nection 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 data
transfer during the measurement. The PC used requires a WLAN module for wireless transmission.
The ScanFieldMonitor SFM is controlled and the measurement results evaluated using the
LaserDiagnosticsSoftware LDS.
ScanFieldMonitor SFM
Device holder
On/off button Processing Unit
Socket for connection cable
Ethernet connection socket
USB connection socket for
charging the power bank
Processing Unit
On/off button
Power bank
Connecting cable
Alignment tool
Power bank
Power bank display
Fig. 6.1: Functional description of the ScanFieldMonitor SFM

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6.2 Measuring principle
The ScanFieldMonitor SFM is equipped with a glass plate, in the middle of which is a small scattering struc-
ture. As the laser beam passes over the scattering structure, part of the laser beam is scattered along the
lines 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 the
laser beam are determined by evaluating the time track in the LaserDiagnosticsSoftware LDS. When measur-
ing 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 is
positioned 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 adjacent
scan 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 mea-
sured.
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 propaga-
tion parameters of the entire caustic of the laser beam are obtained:
• like focus position and focus diameter
• the 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 posi-
tion over the entire processing field. Furthermore, measuring the switch-on and switch-off delay of the laser
is possible via a separate measurement mode.
Time
t1t2t3t4t5t6
φ
(xi,yi)
(xf,yf)
x
y
Photodiode
Scattering
structure
Vector
Glass plate
Vector
Laser beam
Fig. 6.2: Measuring principle of the ScanFieldMonitor SFM

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7 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 the
LaserDiagnosticsSoftware LDS
2. Taking safety precautions Chapter 1 on page8
3. Installing the plugin ScanFieldMonitor SFM on the computer
• Software is part of the scope of delivery
Chapter 8 on page15
4. Charge the power bank
• Set output voltage
• Check charge status
Chapter 10 on page16
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
Chapter 11 on page18
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
Chapter 12 on page20
7. Electrical connection
• Establish power supply
• Connect the ScanFieldMonitor SFM to the Processing Unit
• Establish WLAN or Ethernet connection with the PC
Chapter 13 on page25
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
Chapter 16 on page30

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8 Install/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:
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:
You will see the following message:
The plugin has been installed successfully / The plugins have been installed successfully.
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 be
reinstalled. To do this, uninstall the old plugin and install the new plugin after updating the
LaserDiagnosticsSoftware 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.
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

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9 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.

Handle the device carefully when transporting or installing it.

To avoid contamination, close the inlet aperture of the ScanFieldMonitor SFM with the sup-
plied 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 be
pulled out and replaced.
• A Processing Unit with permanently installed power bank. For this Processing Unit the power bank can-
not 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:
The ring light on the Processing Unit flashes and switches off.
The ScanFieldMonitor SFM is switched off.
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:
The charge status is shown in percent in the power bank display.
Processing Unit
Power bank
or
On/off button Processing Unit
Fig. 10.1: Charge the Processing Unit with installed power bank or charge the removed power bank, both with the
quick-charge plug-in power supply
During the charging process, further information can be shown in the display:
Display during charging Meaning Measure
Battery symbol flashes and
alternates with the display of the
charging power in W
The power bank is charg-
ing
---

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Display during charging Meaning Measure
OV Over voltage The charging process is stopped automatically:
• Activate the Processing Unit again by briefly
pressing the on/off button.
UV Under voltage
OC Charge current too high
OT Temperature too high The charging process is stopped automatically:
• Let the power bank cool down. Continue charg-
ing after the power bank has cooled down.
• Activate the Processing Unit again by briefly
pressing the on/off button.
Tab. 10.1: Displays during charging
10.1 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 low-
est 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 power
bank 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 vari-
ous 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

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11 Installing the protective window spacer on the ScanFieldMonitor SFM
For high power densities above 15MW/cm² at the ScanFieldMonitor SFM protective window, we recom-
mend 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. Observe the safety instructions in chapter 19.1.1 on page67.
2. Unscrew the 5 Torx screws M2 x 3 mm (Torx 6 screwdriver) at the protective window holder.
3. Put on powder-free latex gloves.
4. Remove the protective window holder carefully upwards.
5. 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mm
Protective window
Protective window
holder
Indentation
O-Ring
Fig. 11.1: Removing the protective window and O-ring on ScanFieldMonitor SFM

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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
spacer
Fig. 11.2: Installing the protective window spacer

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12 Install 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 splin-
ter.
The movement of the coater (scraper) can damage the ScanFieldMonitor SFM.

Only operate the device in a cleaned laser system.

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 the
allowed 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 radia-
tion can enter the device. The scattering structure relevant for measuring amounts approx. 7.5 mm x 7.5
mm. We recommend to use vectors with a maximum length of 10mm, i.e. 1.5mm in front and behind the
scattering 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 the
absorption 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).