Synrad Firestar V Series User manual

4600 Campus Place
Mukilteo, WA 98275
1.800.SYNRAD1
tel [phone]
fax [phone]
e-mail [email protected]om
web www.synrad.com

OEM v40
Operator’s Manual
Version 4
SYNRAD©is a registered trademark of Novanta Corporation. ©Novanta Corporation
2019. All Rights Reserved. No reproduction without written authorization.
DATE: March 2019

table of contents
iii
SYNRAD OEM v40 Operator’s Manual Version 4
Getting Started 1
Laser Safety
Operation 2
Hazard information.....................................................................................................1
Terms...................................................................................................................................................1
General hazards...............................................................................................................................1
v40 label locations ......................................................................................................4
Agency compliance....................................................................................................5
Center for Devices and Radiological Health (CDRH) requirements..............................5
Federal Communications Commission (FCC) requirements...........................................6
European Union (EU) requirements.........................................................................................7
Introduction ..................................................................................................................1-2
Firestar nomenclature...................................................................................................................1-2
Unpacking......................................................................................................................1-3
Incoming inspection .....................................................................................................................1-3
Packaging guidelines ....................................................................................................................1-3
Inventory ........................................................................................................................1-4
Contents description.....................................................................................................................1-5
Mounting........................................................................................................................1-6
Fastening from above ...................................................................................................................1-6
Fastening from below...................................................................................................................1-7
Connecting....................................................................................................................1-8
Water-cooled connections..........................................................................................................1-8
OEM air-cooled connections (SAB models) ..........................................................................1-12
Electrical connections...................................................................................................................1-14
Control connections ......................................................................................................................1-16
Keyswitch controls and indicators ........................................................................2-2
v40 front panel ................................................................................................................................2-2
v40 rear panel ..................................................................................................................................2-3
OEM controls and indicators...................................................................................2-4
OEM v40 front panel......................................................................................................................2-4
OEM v40 rear panel........................................................................................................................2-5
OEM v40 side panel (SAB models)............................................................................................2-6
Initial start-up ...............................................................................................................2-7
With a UC-2000 Controller...........................................................................................................2-7
Without a UC-2000 Controller....................................................................................................2-10

table of contents
iv SYNRAD OEM v40 Operator’s Manual Version 4
Maintenance/Troubleshooting 4
Index
Technical Reference 3
Technical overview .....................................................................................................3-2
Laser tube..........................................................................................................................................3-2
Optical resonator............................................................................................................................3-2
RF power supply .............................................................................................................................3-3
Optical setup....................................................................................................................................3-3
Controlling laser power.............................................................................................3-5
Control signals.................................................................................................................................3-5
Operating modes............................................................................................................................3-7
User I/O connections..................................................................................................3-10
User I/O connection summary...................................................................................................3-10
Input/output signals......................................................................................................................3-12
Sample I/O circuits .........................................................................................................................3-19
DB-9 connections (SAB models only)...................................................................3-22
Integrating Firestar safety features ......................................................................3-24
Keyswitch functions.......................................................................................................................3-24
Shutter functions............................................................................................................................3-25
Remote interlock functions.........................................................................................................3-25
v40 general specications........................................................................................3-26
Firestar v40 package outline drawings................................................................3-28
Packaging instructions drawing ............................................................................3-31
Maintenance .................................................................................................................4-2
Disabling Firestar............................................................................................................................4-2
Daily inspections.............................................................................................................................4-2
Storage/shipping............................................................................................................................4-3
Cleaning optical components....................................................................................................4-3
Troubleshooting ..........................................................................................................4-6
Introduction......................................................................................................................................4-6
Operational owchart...................................................................................................................4-7
Functional block diagram............................................................................................................4-8
Status LEDs........................................................................................................................................4-9
Laser faults ........................................................................................................................................4-11
Resetting faults................................................................................................................................4-11
Other laser faults.............................................................................................................................4-14
Beam delivery optics .....................................................................................................................4-17

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v
SYNRAD OEM v40 Operator’s Manual Version 4
List of Figures
Figure 1 Firestar v40 hazard label locations................................................4
Figure 1-1 Firestar v40 shipping box contents ..............................................1-4
Figure 1-2 Fastening from above........................................................................1-6
Figure 1-3 Fastening from below........................................................................1-7
Figure 1-4 Firestar cooling connections ..........................................................1-11
Figure 1-5 Recommended v40 cooling fan locations ................................1-12
Figure 1-6 Rear-mounted cooling......................................................................1-13
Figure 1-7 DC-5 power supply.............................................................................1-14
Figure 2-1 Keyswitch v40 front panel controls and indicators.................2-2
Figure 2-2 Keyswitch v40 rear panel controls and indicators...................2-3
Figure 2-3 OEM v40 front panel controls and indicators ...........................2-4
Figure 2-4 OEM v40 rear panel controls and indicators .............................2-5
Figure 2-5 OEM v40 side panel controls and indicators.............................2-6
Figure 3-1 v40 beam characteristics..................................................................3-3
Figure 3-2 “Flying optics” beam path ................................................................3-4
Figure 3-3 Representative Firestar v40 waveforms......................................3-6
Figure 3-4 PWM Command signal waveform.................................................3-7
Figure 3-5 User I/O connector pinouts .............................................................3-12
Figure 3-6 Auxiliary power supply wiring........................................................3-13
Figure 3-7 Quick Start Plug wiring diagram....................................................3-15
Figure 3-8 Input equivalent schematic.............................................................3-16
Figure 3-9 Output equivalent schematic.........................................................3-18
Figure 3-10 Customer-supplied interlock ..........................................................3-19
Figure 3-11 Customer-supplied interlock, negative voltage ......................3-19
Figure 3-12 PLC driven interlock signal...............................................................3-19
Figure 3-13 Multiple PLC driven inputs...............................................................3-20
Figure 3-14 Firestar output driving warning lamp .........................................3-20
Figure 3-15 Firestar output driving relay............................................................3-21
Figure 3-16 Firestar output driving PLC input module .................................3-21
Figure 3-17 DB-9 connector pinouts....................................................................3-22
Figure 3-18 Water-cooled Firestar v40 package outline and
mounting dimensions.......................................................................3-28
Figure 3-19 Fan-cooled Firestar v40 package outline and
mounting dimensions.......................................................................3-29
Figure 3-20 Air-cooled Firestar v40 (SAB model) package outline and
mounting dimensions ......................................................................3-30

table of contents
vi SYNRAD OEM v40 Operator’s Manual Version 4
List of Figures (cont.)
Figure 3-21 Firestar v40 packaging instructions .............................................3-31
Figure 4-1 Operational owchart .......................................................................4-7
Figure 4-2 v40 functional block diagram.........................................................4-8

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SYNRAD OEM v40 Operator’s Manual Version 4
List of Tables
Table 1 Class IV safety features ......................................................................8
Table 1-1 Ship kit contents..................................................................................1-4
Table 1-2 Dew point temperatures ..................................................................1-10
Table 3-1 Assist gas purity specications.......................................................3-4
Table 3-2 PWM Command signal levels .........................................................3-7
Table 3-3 User I/O pin descriptions..................................................................3-10
Table 3-4 Input circuit specications...............................................................3-16
Table 3-5 Output circuit specications...........................................................3-18
Table 3-6 Side-mounted DB-9 pin descriptions ..........................................3-22
Table 3-7 Firestar v40 general specications................................................3-26
Table 4-1 Required cleaning materials ...........................................................4-4
Table 4-2 Status signals .......................................................................................4-9
Table 4-3 Interlock Open condition ................................................................4-10
Table 4-4 Over Temperature condition...........................................................4-10
Table 4-5 Shutter Open condition....................................................................4-10
Table 4-6 Laser faults.............................................................................................4-11

viii Synrad Firestar v40 operator’s manual
Trademark/copyright information
SYNRAD and Firestar are registered trademarks of SYNRAD
All other trademarks or registered trademarks are the property of their respective owners.
© 2019 by SYNRAD
All rights reserved.

ix
Synrad Firestar v40 operator’s manual
Warranty information
This is to certify that v40 lasers are guaranteed by SYNRAD to be free of all defects in materials and
workmanship for a period of one year from the date of purchase. This warranty does not apply to any
defect caused by negligence, misuse (including environmental factors), accident, alteration, or im-
proper maintenance. We request that you examine each shipment within 10 days of receipt and inform
SYNRAD of any shortage or damage. If no discrepancies are reported, SYNRAD shall assume the ship-
ment was delivered complete and defect-free.
If, within one year from the date of purchase, any part of the v40 laser should fail to operate, contact
the SYNRAD Customer Service department at 1.800.SYNRAD1 (outside the U.S. call 1.425.349.3500)
and report the problem. When calling for support, please be prepared to provide the date of purchase,
model number and serial number of the unit, and a brief description of the problem. When returning a
unit for service, a Return Authorization (RA) number is required; this number must be clearly marked on
the outside of the shipping container in order for the unit to be properly processed. If replacement parts
are sent to you, then you are required to send the failed parts back to SYNRAD for evaluation unless
otherwise instructed.
If your v40 laser fails within the rst 45 days after purchase, SYNRAD will pay all shipping charges to and
from SYNRAD when shipped as specied by SYNRAD Customer Service. After the rst 45 days, SYNRAD
will continue to pay for the costs of shipping the repaired unit or replacement parts back to the cus-
tomer from SYNRAD. The customer, however, will be responsible for shipping charges incurred when
sending the failed unit or parts back to SYNRAD or a SYNRAD Authorized Distributor. In order to main-
tain your product warranty and to ensure the safe and ecient operation of your Firestar v40 laser, only
authorized SYNRAD replacement parts can be used. This warranty is void if any parts other than those
provided by SYNRAD are used.
SYNRAD and SYNRAD Authorized Distributors have the sole authority to make warranty statements
regarding SYNRAD products. SYNRAD and its Authorized Distributors neither assumes nor authorizes
any representative or other person to assume for us any other warranties in connection with the sale,
service, or shipment of our products. SYNRAD reserves the right to make changes and improvements
in the design of our products at any time without incurring any obligation to make equivalent changes
in products previously manufactured or shipped. Buyer agrees to hold SYNRAD harmless from any and
all damages, costs, and expenses relating to any claim arising from the design, manufacture, or use of
the product, or arising from a claim that such product furnished Buyer by SYNRAD, or the use thereof,
infringes upon any Patent, foreign or domestic.

xSynrad Firestar v40 operator’s manual
Service & support information
SYNRAD©worldwide headquarters are located north of Seattle in Mukilteo, Washing-
ton. U.S.A. Our mailing address is:
SYNRAD
4600 Campus Place
Mukilteo, WA 98275
U.S.A.
Phone us at: 1.800.SYNRAD1 (1.800.796.7231)
Outside the U.S.: +1.425.349.3500
Fax: [phone]
web: www.synrad.com
E-mail: [email protected]
Sales and Applications
SYNRAD Regional Sales Managers work with customers to identify and develop the
best CO2laser solution for a given application. Because they are familiar with you and
your laser application, use them as a rst point of contact when questions arise. Re-
gional Sales Managers also serve as the liaison between you and our Applications Lab
in processing material samples per your specications. To speak to the Regional Sales
Manager in your area, call SYNRAD at 1.800.SYNRAD1.
Customer Service
For assistance with order or delivery status, service status, or to obtain a Return Au-
thorization (RA) number, contact SYNRAD at 1.800.SYNRAD1 and ask to speak to a
Customer Service representative, or you can email us by sending a message to customer-
[email protected].
Technical Support
SYNRAD Regional Sales Managers are able to answer many technical questions regard-
ing the installation, use, troubleshooting, and maintenance of our products. In some
cases, they may transfer your call to a Laser, Marking Head, or Software Support Spe-
cialist. You may also e-mail questions to the Technical Support Group by sending your
message to [email protected].
Reference materials
Your Regional Sales Manager can provide reference materials including Outline &
Mounting drawings, Operator’s Manuals, Technical Bulletins, and Application Newslet-
ters. Most of these materials are also available directly from SYNRAD web site at http://
www.synrad.com.

xi
Synrad Firestar v40 operator’s manual
EU headquarters
For assistance in Europe, contact SYNRAD©European subsidiary, Synrad Europe, at:
©Novanta Distribution (USD) GmbH
Parkring 57-59
85748 Garching bei München, Germany
Phone:[phone]
web: www.synrad.com
e-mail: EMEA-[email protected]

getting started
12
SYNRAD OEM v40 Operator’s Manual Version 4
Use information in this chapter to prepare your Firestar v40 laser for operation. The
order of information presented in this chapter is the same as the order of tasks that you
need to perform.The best way to get your laser ready for operation is to start at Inventory
and work your way through Connecting.
This chapter contains the following information:
■Introduction – introduces the Firestar v40 laser, lists important features, and
describes Firestar nomenclature.
■Unpacking – provides important information about shipping your v40 laser.
■Inventory – displays and describes all components shipped with your laser.
■Mounting – describes how to attach laser components to a mounting surface.
■Connecting – explains how to connect power and control cables as well as cooling
connections for water-cooled models.
1

getting started
13
SYNRAD OEM v40 Operator’s Manual Version 4
Introduction
The Firestar®v40 laser is a small-footprint laser from SYNRAD featuring high power and excellent beam
quality. The circular beam provides more accurate cutting and faster processing speeds than competing
technologies. With an integrated RF power supply, meaning no external RF cables, the compact laser
housing mounts easily to atbed cutters, robotic arms, or gantry systems making integration into your
production line simple and fast.
Firestar v40 features include:
■Compact resonator design
■RF power supply integrated into laser chassis
■Built-in “tickle” generator
■Color-coded LEDs mirror user outputs
■“Industrial-strength” ±5–24 VDC inputs and outputs
■Keyswitch fan- or water-cooled models available
■OEM (no Keyswitch/no shutter) air-, fan-, or water-cooled models available
Firestar nomenclature
Firestar v40 lasers are divided into two distinct functional categories: Keyswitch and OEM models. In ad-
dition to a manual Keyswitch, all Keyswitch-equipped lasers include a manual shutter switch that allows the
laser output aperture to be blocked. OEM lasers do not incorporate either a manual keyswitch or shutter
assembly since they are primarily designed as components to be integrated into a larger processing system
by the Original Equipment Manufacturer (OEM) or System Integrator who bears the responsibility for
meeting the appropriate laser safety requirements for Class IV laser systems.
Model numbers
The last three characters in the Firestar model number serve to designate the functional category, cool-
ing method, and model version. The functional category is indicated by either a“K” for Keyswitch or “S”
(Switch-less) for OEM models. The next letter indicates the cooling method:“W” for water-cooled units,
“F”for fan-cooled units, and“A”for air-cooled lasers (where the customer must provide the proper cooling
via fans or blowers). The last letter in the model number indicates the current model version beginning
with “B”. For example, the model number FSV40KFD designates that particular Firestar v40 laser as a“D”
version, Keyswitch, fan-cooled model. FSV40SAD indicates an OEM, air-cooled v40 laser.

getting started
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SYNRAD OEM v40 Operator’s Manual Version 4
Unpacking
The Unpacking section includes subsections:
■Incoming inspection
■Packaging guidelines
Incoming inspection
Upon arrival, inspect all shipping containers for signs of damage. If you discover shipping damage,
document the damage (photographically if possible), then immediately notify the shipping carrier and
SYNRAD.
The shipping carrier is responsible for any damage occurring during transportation from SYNRAD, Inc. to
your receiving dock.
Packaging guidelines
■To prevent equipment damage or loss of small components, use care when removing packaging materi-
als.
■Save all shipping containers and packaging materials, including covers and plugs. Use these special-
ized packing materials when shipping the laser to another location.
■After unpacking, review the Inventory section and verify that all components are on hand.
■When packing a laser for shipment, be sure to remove all accessory items not originally attached to
the laser including beam delivery components, cooling tubing, ttings, etc.
■Refer to the Packaging Instructions drawing in the Technical Reference chapter for information on
packaging a v40 for shipment using SYNRAD-supplied packaging materials.
■When shipping water-cooled lasers, remember to drain all cooling water from the laser and then cap
open ttings to prevent debris from entering the coolant path.
■Do not lift or support the laser using the cooling ttings; lift the laser by the mounting feet or
baseplate only.

getting started
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SYNRAD OEM v40 Operator’s Manual Version 4
Inventory
Figure 1-1 Firestar v40 shipping box contents
Table 1-1 lists items included in the v40 ship kit.
Table 1-1 Ship kit contents
Shipping Box Contents Qty Shipping Box Contents Qty
SYNRAD Firestar v40 Laser...............................1 Firestar v40 Operator’s Manual ......................1
Quick Start Plug (except SAB models) .........1 Spare Fuse (not shown).....................................2
Cooling Tubing (water-cooled only).............1 Final Test Report (not shown) .........................1
Mounting Bolts.....................................................3
Firestar v40
Operator's Manual
Mounting Bolts
and Fuses
Cooling Tubing
(water-cooled only)
Quick Start Plug
Firestar v-Series Laser
(v40 fan-cooled laser shown)
AVOIDEXPOSURE
Invisible laser radiation
is emitted from
this aperture.
INVISIBLELASERRADIATION
AVOIDEYEOR SKIN EXPOSURETO
DIRECTORSCATTEREDRADIATION
CLASS4LASER PRODUCT
150WATTS MAX
10510-10650 nm
EN-60825-1,1993

getting started
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SYNRAD OEM v40 Operator’s Manual Version 4
Inventory
Contents description
Each item listed in Table 1-1 is described below.
SYNRAD Firestar v40 Laser – for cutting, welding, drilling, and marking a wide variety of products and
materials.
Quick Start Plug (except SAB models) – connects to Firestar’s User I/O connector. Jumpers are built into
the plug to enable Firestar’s shutter and remote interlock circuits for initial start-up and testing.
Cooling Tubing (water-cooled only) – carries cooling water from the chiller to the laser and back. This
black polyethylene tubing is 1/2" O.D. by 30 feet and must be cut to length.
Mounting Bolts – 1/4–20 × 5/8" bolts fasten Firestar to your mounting surface.
Firestar v40 Operator’s Manual – provides setup, operation, and maintenance information for your Firestar
v40 laser.
Spare Fuse (not shown) – fast blow 25 A fuse protects Firestar’s internal circuitry.
Final Test Report (not shown) – contains data collected during the laser’s nal pre-shipment test.

getting started
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SYNRAD OEM v40 Operator’s Manual Version 4
Mounting
The Mounting section includes subsections:
■Fastening from above
■Fastening from below
Firestar’s base plate is designed so that the laser is easily mounted to either vertical or horizontal surfaces
using only three fasteners. Three ball bearing“feet”pressed into Firestar’s base plate eliminate any possible
distortion of the laser tube caused by variations in the atness of the surface on which the laser is mounted.
Refer to the v40 package outline drawings in the Technical Reference chapter for mounting locations and
dimensions. Read through the mounting sections below to determine which set of mounting holes are re-
quired for your application. When mounting Firestar lasers, you can choose to fasten from above, into your
mounting surface, or from below, into Firestar’s base plate.
Note: To allow proper airow, air- or fan-cooled units must have at least 2.25" (57.2 mm) of unobstruct-
ed clearance between the outside edge of the cooling fan and any enclosure or surface.
Caution
possible
equipment
damage
SYNRAD does not recommend mounting lasers in a vertical “head-
down” or “tail-down” orientation. If you must mount your laser in
this manner, please contact the factory for limitations as vertical
orientation increases the risk of damage to the laser’s output optic.
Fastening from above
To fasten Firestar to a mounting surface from above, perform the following steps:
1 Refer to the appropriate outline and mounting drawing for dimensions and then drill and tap three
1/4–20 UNC holes into your mounting surface. These hole locations should correspond to the two
slots labeled “A” and the thru hole labeled “B” shown in Figure 1-2.
Figure 1-2 Fastening from above
Top View
(v40 Fan-Cooled Model)
CAUTION
CONDENSATION AND
WATER DAMAGE CAN
OCCUR IF COOLING WATER
IS BELOW DEW POINT.
SEE OPERATION MANUAL.
INVISIBLE LASER RADIATION
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION
CLASS 4 LASER PRODUCT
EN-60825-1,2007
150 WATTS MAX
10510-10650 nm
MODEL #: FSV40KFD SERIAL #: FS40204082943 TESTED AT: 30V MFG: July 22, 2008
Complies with IEC 60825-1 (2007) and 21 CFR 1040.10 except
for deviations pursuant to Laser Notice No. 50 dated June 24, 2007.
SYNRAD, Inc. 4600 Campus Place, Mukilteo WA 98275 425.349.3500
A
A
B

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SYNRAD OEM v40 Operator’s Manual Version 4
Mounting
2 Place Firestar on the mounting surface so that slots “A” and hole “B” on the base plate line up with
the tapped holes in the mounting surface.
3 Insert 1/4–20 × 5/8" UNC capscrews through Firestar’s base plate into the threaded holes of the
mounting surface. Turn the screws by hand until the threads engage.
4 Tighten all three capscrews to a torque of 6 ft lbf(8 N m) maximum.
Fastening from below
To fasten Firestar to a mounting surface from below, perform the following steps:
1 Refer to the appropriate outline and mounting drawing for dimensions and then drill three 0.261"
(6.6 mm) diameter holes into your mounting surface. Hole locations should correspond to the
threaded holes labeled “C” shown in Figure 1-3.
Figure 1-3 Fastening from below
2 Place Firestar on the mounting surface so that the threaded holes on the base plate (labeled“C” in
Figure 1-3) line up with the holes drilled through the mounting surface.
3 Insert 1/4–20 × 5/8" UNC capscrews through the mounting surface into the threaded holes of Fire-
star’s base plate. Turn the screws by hand until the threads engage.
4 Tighten all three capscrews to a torque of 6 ft lbf(8 N m) maximum.
Top View
(v40 Fan-Cooled Model)
CAUTION
CONDENSATION AND
WATER DAMAGE CAN
OCCUR IF COOLING WATER
IS BELOW DEW POINT.
SEE OPERATION MANUAL.
INVISIBLE LASER RADIATION
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION
CLASS 4 LASER PRODUCT
EN-60825-1,2007
150 WATTS MAX
10510-10650 nm
C
C
C
MODEL #: FSV40KFD SERIAL #: FS40204082943 TESTED AT: 30V MFG: July 22, 2008
Complies with IEC 60825-1 (2007) and 21 CFR 1040.10 except
for deviations pursuant to Laser Notice No. 50 dated June 24, 2007.
SYNRAD, Inc. 4600 Campus Place, Mukilteo WA 98275 425.349.3500

getting started
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SYNRAD OEM v40 Operator’s Manual Version 4
Connecting
The Connecting section includes subsections:
■Water-cooled connections
■OEM air-cooled connections
■Electrical connections
■Control connections
Water-cooled connections
Note: If your v40 laser is fan-cooled, then skip to the Electrical connections section.
Read Guidelines for cutting and installing tubing before installing any cooling tubing and then make sure to
connect the cooling system exactly as described for your particular laser.
Guidelines for cutting and installing tubing
■Cut tubing lengths generously to allow for trimming.
■Cut tubing squarely; diagonal cuts may not seal properly. Carefully trim any burrs if the cut is“ragged”.
■Avoid excessive stress on ttings; create gentle bends when routing tubing close to connectors.
Excessive stress from sharp bends tubing will compromise the sealing properties of the tting.
■Never allow the tubing to kink, since kinking severely restricts coolant ow.
■Push tubing completely into the tting, then pull the tubing to verify that it is locked into place.
Tubing extends into the tting approximately 7/8 of an inch.
■If tubing must be disconnected from a tting, rst push and hold the tubing slightly into the tting.
Next push the white tting ring evenly towards the tting, and then pull the tubing free.
■After disconnecting tubing from a tting, trim 1/2" from its end before reconnecting. Trimming
the end of the tubing before reconnecting the tting provides an undisturbed sealing surface.
Laser cooling ttings
If your integrated laser application uses metric cooling tubing, we recommend the installation of tubing
adaptors to convert the laser’s WATER IN and WATER OUT ttings from 1/2-inch tubing to 12-mm met-
ric tubing. These tubing adaptors are available from many tubing and tting manufacturers.
If, for any reason, you must remove and then reinstall the threaded WATER IN and WATER OUT cooling
ttings on the laser, do not overtighten them. When installing new ttings, wrap the threads with teon
tape and then carefully tighten the ttings until they are just snug enough to prevent water leakage.

getting started
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SYNRAD OEM v40 Operator’s Manual Version 4
Connecting
Chiller preparation guidelines
■You must provide ttings that will adapt the laser’s 1/2" O.D. polyethylene cooling tubing to your
chiller’s Inlet and Outlet ports. These ttings can be either “quick disconnect” or compression type
ttings.
■Because Firestar’s cooling tubing is specied in inch sizes, the use of metric tubing ttings is discour-
aged unless you have installed the appropriate inch-to-metric tubing adaptors. The use of metric t-
tings on inch size tubing will lead to coolant leaks or may allow the pressurized tubing to blow o the
tting.
Coolants
SYNRAD recommends that the laser’s cooling uid contain at least 90% water (distilled or tap) by vol-
ume. In closed-loop systems, use a corrosion inhibitor/algaecide such as Optishield®Plus or equivalent.
Avoid glycol-based additives because they reduce the coolant’s heat capacity and high concentrations may
aect power stability. For SYNRAD lasers, the minimum coolant setpoint is 18 °C (64 °F) so glycol is not
necessary unless the chiller is subjected to freezing temperatures. In applications where biocides containing
chlorides are used, concentrations should not exceed 25 parts per million (PPM). Maintain a coolant pH
level above 7.0. We recommend the installation of a lter on the chiller’s return line, especially in areas
where water hardness is a problem. Firestar v40 lasers incorporate the following wetted materials in the
coolant path—aluminum, brass, copper, Delrin®, PBT, polyethylene, stainless steel, and Viton®.
Setting coolant temperature
Choosing the correct coolant temperature is important to the proper operation and longevity of your laser.
When coolant temperature is lower than the dew point (the temperature at which moisture condenses out
of the surrounding air), condensation forms inside the laser housing leading to failure of laser electronics as
well as damage to optical surfaces.
The greatest risk of condensation damage occurs when the laser is in a high heat/high humidity environ-
ment and the chiller’s coolant temperature is colder than the dew point of the surrounding air or when the
system is shut down, but coolant continues to ow through the laser for extended periods of time.
The chiller’s temperature setpoint must always be set above the dew point temperature. In cases where this
is not possible within the specied coolant temperature range of 18 °C–22 °C (64 °F–72 °F), then the fol-
lowing steps MUST be taken to reduce the risk of condensation damage.
■ Stop coolant ow when the laser is shut down.
■ Increase coolant ow by an additional 1.0 GPM (3.8 lpm). Do not exceed a coolant pressure of 60 PSI
(4.1 bar).
■ Air-condition the room or the enclosure containing the laser.
■ Install a dehumidier to reduce the humidity of the enclosure containing the laser.
Table 1-2 provides dew point temperatures for a range of air temperature and relative humidity values.
Remember that the laser’s coolant temperature must be set above the dew point temperatures shown in the
chart, but should not exceed 22 °C (72 °F).