Synrad p250 User manual

1 p250 Laser Quick Start Guide Version 3.1
p250 Quick Start Guide
250
1.1 Two places for both people at
opposite ends of the box for lifting.
Potential
Lifting
Injury
Use two people at a minimum to lift and/or
move the laser.
Use carts to minimize risk.
Danger
Two
Person Lift
Caution! Unpacking the wire harness incorrectly can lead to damage.
Keep All specially designed Foam Packaging and end-caps, you will need to re-use it
when re-packaging/moving your laser. Refer to this guide and the Technical Reference
chapters in the laser’s Operation Manual when re-packaging for shipping and/or reloca-
tion.
If you discover shipping damage, document the damage (photographically if possible), then immediately no-
tify the shipping carrier (responsible party) and SYNRAD. After unpacking, review the Inventory list in the Intro
section within the operators manual.
If you need a replacement box for packing and/or shipping your laser, contact us.
Caution! When re-packing the laser for relocation or shipment, nothing can be on the sides of the laser
at any time as damage will occur. There is only one way the laser ts into the foam! All components must
be stowed under the laser. Re-package the wire harness as shown above. The wire harness &/or ports can
be damaged in shipping if not re-packaged as shown in this guide, the drawings, operation manual, and/or
resources located in our website.
Caution
Possible equip-
ment damage
Mounting feet and/or rails are optional, for complete details, refer to the laser’s Operator’s Manual and draw-
ings and Mounting located on our website.
Laser Unpacking:
Important
Note:
See your Marking Head (If utilized) and the Pulstar p100/150 Operators Manual for com-
plete installation details and instructions.
Read all Danger, Warning, Caution terms, symbols, and instructions located in
the (Laser Safety Hazard information) sections in the Laser’s Operation Manual and in
our Laser Safety/Compliance 101 on our website.

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p250 Quick Start Guide
Laser Unpacking (Continued):
Hint: There is only one way the laser ts into the foam! If laser does not re-seat easily, try ipping it around
so the ports sit into the foam as shown.
Note: IF using the Flyer 3D marking head with your laser, review the following sections in this guide, also
see the Mounting & Flyer 3D Quick Start Guide and reference the Flyer 3D WMPv7 QSG located on
our website. Otherwise, see the note below.
Note: IF using the FH Flyer marking head with your laser, go to the Mounting & FH Flyer Quick Start Guide
and reference the FH Flyer & WMPv6 QSG located on our website.
Laser ttings
When re-packaging for storage and/or relocation: Assure
the (2) H2O ports are nested inside the foam notches, & all
residual water is drained from the system.
2.1 Locate the wire
harness inside
the end cap.
End cap
2. Locate the mounting hardware kit at the end cap (tting side of the box or the cardboard pocket.)
If you are not using a SYNRAD Marking Head, proceed to the next section.
1. A minimum of two people will be required to lift the laser out of the box using the lifting handles on
each side of the box.
1.2 Correct hand placement for lifting
the laser out of the box.
Note: See Cooling 101 located on our website.
Note: IF not using a SYNRAD marking head OR mounting kit with your laser, continue to the section
below.

3 p250 Laser Quick Start Guide Version 3.1
p250 Quick Start Guide
250
When mounting the laser to a baseplate, use only one metric or SAE fastener per mounting tab on the base-
plate. Do not use any type of jackscrew arrangement as this will twist the baseplate and may distort the tube.
SYNRAD does not recommend mounting lasers in a vertical, (head and/or tail down)
position. Please contact the factory for limitations as a vertical orientation increases the
risk of damage to the lasers optics. Consult the factory for further mounting angle guid-
ance outside >75% from the horizontal.
Readying your Laser for use:
SYNRAD recommends performing the initial startup procedure located at the end of this guide at initial op-
eration for new lasers and/or after relocation of your laser.
Caution
Possible
Equipment
Damage
Mounting:
3. Choose your mounting type & refer to the Outline and Mounting drawings online.
a. Mounting from above (with mounting feet)- See the following gure, O&M drawings, torque,
thread engagement, and washer data below.
b. Mounting from below- Assemble three spherical washer sets as shown in Detail B in the O&M
drawing.
4. You will need to mount your laser to a mounting surface with three (3) M8 x 1.25 (Metric) or 5/16-18
mm (English) fasteners. Drill and tap three corresponding holes in the mounting surface. See
the gure below, Evenly tighten all three fasteners. Maximum torque 12 Nm (106 in-lb). Minimum
thread engagement should be 16 mm or 0.625 in. *Recommend using low-outgassing thread lock
Caution
Possible
Equipment
Damage
The spherical cup and washer sets are positioned between the laser’s mounting brackets
and the mounting surface to eliminate any possible distortion caused by variations in the
atness of the surface.
Variances in mounting surface will lead to tube distortion resulting in laser damage!
INVISIBLELASER RADI ATIO N
AVOID EYE OR SKIN EXPOSURE TO
DIRECTOR SC ATTERED RADI ATIO N
CLASS4 LASER PRODUC T
EN-60825-1,2007
xxxx WATTSMA X
10200-10800 NANOMETERS
p250 Top View
A
A
A
MODEL #: PSP250SB SERIAL #: P250136130001 TESTEDAT 48 Vo ltsMFG May16, 2013
Thislaser component does not comply with standards for complete
laserproducts as specified by 21 CFR 1040.10 or IEC 60825-1.
SYNRAD,Inc. 4600 Campus Place, Mukilteo WA 98275 425.349.3500
Note: Use metric or SAE fasteners with the laser’s mounting bracket/spherical washer set into a threaded
mounting surface.

4 p250 Laser Quick Start Guide Version 3.1
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p250 Quick Start Guide
5. When mounting the p250, you can choose to fasten from below, into the mounting surface, into the
laser’s mounting brackets. See the gure below.
Assemble three spherical washer sets as shown in Detail in the following drawing. These hole locations
should correspond to the threaded holes labeled “M”, for metric, or “S”, for standard. Insert the appropriate
fasteners through the mounting surface and spherical washers into the threaded holes in the mounting
brackets. Evenly tighten all three fasteners.
Once mounting is complete, click here to go to the cooling section.
When mounting the Pulstar laser, use only one metric or SAE fastener per mounting tab
on the baseplate. Do not use any type of jackscrew arrangement as this will twist the
baseplate and may distort the tube. Refer to the mounting drawings in the Technical
Reference chapter in the Pulstar p250 Operation Manual.
INVISIBLELASER RADI ATION
AVOID EYE OR SKIN EXPOSURE TO
DIRECTOR SC ATTEREDRADI ATIO N
CLASS4 LASER PRODUC T
EN-60825-1,2007
xxxx WATTSMA X
10200-10800 NANOMETERS
p250 Top View
M
M
M
MODEL #: PSP250SB SERIAL#: P250136130001 TESTEDAT 48 Vo lts MFG May16, 2013
Thislaser component does not comply with standards for complete
laserproducts as specified by 21 CFR 1040.10 or IEC 60825-1.
SYNRAD,Inc. 4600 Campus Place, Mukilteo WA 98275 425.349.3500
S
S
S
Caution
Possible
Equipment
Damage
Note: Use metric or SAE fasteners with the laser’s mounting bracket/spherical washer set into a threaded
mounting surface.
Mounting (Continued):

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p250 Quick Start Guide
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6. Before mounting the laser to the rail, ensure the aperture seal is removed.
7. Locate the Mounting Hardware ( ) path enclosure tube, marking head & laser
hardware.
Remove the
aperture seal.
Failure to
remove can
damage the
laser!
Path enclosure tube.
Four (4) nuts and Eye bolts.
Eight (8) Long laser mounting bolts.
Four (4) Triangle bolts.
Two (2) Pegs.
Eight (8) Marking Head Mounting bolts.
Twelve (12) laser mounting bolts.
Mounting (Continued):

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p250 Quick Start Guide
Mounting (Continued):
Note notch
location.
8.2 Four (4) eye bolt locations on the rail
and associated hardware.
8. Locate the Mounting Hardware Kit ( ( ) for the rail. Remove the rail & hardware from
the packaging. Ensure the notch is facing down and to the left. Assemble the eye bolts rst, the bar
second, then the triangle bars third.
Eye bolts
8.3 Ax the bolt onto the eye bolt as shown.
8.4 Assemble the 4 eye-bolts/nuts onto
the rail as shown above in 6.2.
Triangle
bars
Bar
8.1 Rail Kit.
8.5 Tighten the eye bolt to the rail.
8.7 Assure the bolt is snugged ush
with the rail as shown above.
8.6 Detach the bolt on the eye-bolt
so that it moves down toward the rail.

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p250 Quick Start Guide
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9.2 Place the bar on the rail aligning the
pegs as shown.
9.3 Attach the bar securely to the rail with the four
(4) bar hardware screws shown in 7.1.
9. Place the bar onto the rail as shown below.
Bar
(4) Bar
screws
9.1 Bar and hardware.
10. Install the triangle bars as shown below.
Note: The Laser feet screws are shown in their nal locations for clarity on the rail above.
10.1 The Triangle bar screws and nal placement on the rail are shown circled in red below.
Laser feet
screws
Two (2) Bar/
Triangle bar end
screws
When attaching the Marking Head to the Laser, make sure the notch is as shown in gure
below before going on to the next step.
Note:
Laser feet
screws
Mounting (Continued):

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p250 Quick Start Guide
11. After the triangle bars are installed place the side screw(s) as shown below on each side.
11.1 Install the two (2) bar/triangle bar end screws, axing the triangle rails to the bar rail, see 8.1 on the
previous page.
Mounting (Continued):

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p250 Quick Start Guide
250
12. The laser should arrive with feet and shims installed, please refer to the gure below for further detail.
13. Locate the marking head Mounting Hardware Kit ( ): Marking Head Safety tube,
clamp, and Allen screws.
Note: Should look like this when
mounting is complete.
Note: Very important! Assure the notch
is facing to the back left of the laser!
Otherwise, re-work required because the
head will be mounted incorrectly. Notch
Mounting (Continued):

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p250 Quick Start Guide
14. Before mounting the laser to the rail, ensure the aperture seal is removed.
AVOID EXPOSURE
Invisible laser radiation
is emitted from
this aperture.
8
9
6
5
4
INTERFACE
LASE
RDY
PWR
AB
7
SA Model Shown
15.1 Mount the marking head to the rail. Tighten all four (4) screws, (two on each side.)
14.1 Assure the
aperture seal is
removed.
14.2 Place the laser onto the rail with the rear left facing the notch as shown. Tighten each of
the three (3) screws on all four (4) mounting feet.
Caution
Possible equipment
damage
15. Assure the Laser and Marking Head are mounted on the rail rst, then assemble the tube’s path
enclosure below. Locate the path enclosure components in the kit.
Mounting (Continued):

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15.4 Place the expander cooling head into the path enclosure tube
on the gasket end.
15.2 Locate the components above.
15.3 Place the gasket in the path
enclosure tube.
Gasket
Path
Enclosure
Tube
Expander
Cooling Head
15.5 Apply mild compression to the assembly and slide into place.
Rotate the
cooling head
down
Mounting (Continued):

12 p250 Laser Quick Start Guide Version 3.1
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p250 Quick Start Guide
Guidelines for cutting and installing tubing
Cut tubing lengths generously to allow for trimming.
Cut tubing squarely; diagonal cuts may not seal properly. Trim away any burrs if the cut is “ragged”.
Avoid excessive stress on ttings by creating a gentle radius when bends in the tubing are close to
ttings. Bending tubing too sharply 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.
p250 cooling ttings are designed to accept 12mm polyethylene tubing.
If adaption is required, we recommend McMaster-Carr (P/N 51495K416).
.
Use distilled water as the coolant. If glycol is necessary, (temperatures below freez-
ing) add no more than 10% by volume. Use a corrosion inhibitor/algaecide such
as Optishield©. When filling your chiller, use at least 90% distilled or tap water by
volume. Biocides may contain chlorides that shall not exceed 25 PPM. See the tech-
nical reference chapter in the laser’s Operation Manual for the dew point table and
cooling specifications.
Overnighting cooling fittings may crack the cooling manifold, assure the max insertion depth is no more
than 6.6mm (0.26)” into the cooling manifold. Maintain coolant pH above 7. Operating the laser with a
coolant temperature below the dew point of the surrounding air may cause condensation to occur that
will damage the laser! The setpoint temperature MUST be maintained above the dew point temperature.
If tap water is utilized, chloride levels must be below 25 Parts Per Million (PPM). Water total hardness must
be below 100 PPM. If hardness is an issue, install a filter on the chiller’s return line and inspect regularly.
If tubing needs to be disconnected from a tting:
First push and hold the tubing slightly into the tting. Next push the white tting ring evenly to-
wards the tting, and then pull the tubing free.
After disconnecting tubing from a tting, trim 12.7 mm (0.5 in) from its end before reconnecting.
Trimming the end of the tubing before reconnecting provides an undisturbed sealing surface.
Push tubing completely into the tting. Test the tting by giving the newly installed tubing a slight
tug to verify that it is locked into place. Tubing extends into the tting approximately 22 mm
(0.875”).
Note: Quick disconnect or compression type ttings can be utilized. These tubing adapters are avail-
able from many tubing and tting manufacturers. Do not use 1/2 inch size tubing of ttings
without appropriate adapters, doing so increases risk of coolant leaks.
Cooling:
Caution
Possible equipment
damage
Daily inspections for signs of water damage due to condensation is highly recommended!

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When coolant temperature is lower than the dew point, the temperature at which moisture condens-
es out of the surrounding air, condensation forms inside the laser housing leading to failure of laser
electronics as well as damage to optical surfaces. Do not operate your laser in these conditions.
The greatest risk of condensation damage occurs when water-cooled lasers are run in a high heat/high
humidity environment and the chiller’s coolant temperature is colder than the dew point temperature of
the surrounding air or when the system is shut down, but coolant continues to ow through the laser for
extended periods of time. See the dew point table in the laser’s Technical Reference chapter located in the
Operation Manual.
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 to 22 °C (64 °F to 72 °F), then the
following steps MUST be taken to reduce the risk of condensation damage.
A. Stop coolant ow when the laser is shut down.
B. Air-condition the room or the enclosure containing the laser.
C. Install a dehumidier to reduce the humidity of the enclosure containing the laser.
D. Install gas purge- Introduce nitrogen or dry ltered air into the laser housing*.
*See Assist gas purity and Purge gas specications in the Technical References section of the p250 Opera-
tor’s Manual. See the Facilities/Utilities (Air Drop or Gas Purge Port) in the next few sections of this guide.
Cooling (Continued):
Do not ow coolant through the laser for an extended period of time when the laser
is shutdown. This causes condensation to form inside the laser which may result in
catastrophic damage to internal optics and electronic circuits.
Inlet cooling water temperature must always be maintained above the dew point to
prevent condensation and water damage to your laser.
Caution
Possible equipment
damage
Choosing the correct coolant temperature and ttings are important to the proper operation and longevity
of your laser otherwise internal condensation and/or water damage will occur!
Reference the dew point chart for temperatures and range of air temperature and relative humidity val-
ues in the technical references chapter of the p250 Operation Manual.
Remember that the laser’s coolant temperature must be set above dew point temperatures.
16. Locate the Factory-installed cooling ttings are for 12 mm polyethylene tubing included in the Ship Kit
( ).
17. Set coolant temperature between 18–22 °C. See the Operation Manual for cooling specications, Main-
tenance/Troubleshooting and Technical Reference chapters for additional information on condensation
management.
Note: For further details, please see the Pulstar p250 Laser and Marking Head Operation Manuals.
Also reference your Marking Head Quick Start guide located on our website to complete initial
setup.

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p250 Quick Start Guide
Cooling Connections (Continued):
16.1 Exploded view of the Pulstar p250 laser
cooling connections.
Caution
Possible equipment
damage
Do not exceed coolant
pressure of 414 kPa (60
PSI)!
Assure coolant flow is within specifications
located in the Technical Reference chapter of the
Laser’s Operation Manual.
Refer to the dew point table and coolant flow
specifications in the aforementioned chapter in
the Operator’s Manual and gradually increase
coolant temperature until it is above the dew
point temperature and condensation disappears.
Do not exceed a coolant temperature of 30 °C (86
°F).
Important
Note:
If coolant ow needs adjusting:
Water In
Water Out
to chiller
16.1 Water out from the laser into the chiller
`is the top port.
16.2 Top port is for water out from Laser
to chiller. See the bottom port for
water in from the chiller.

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Electrical Connections:
Caution
Possible equipment
damage
Do not reverse polarity! See minimum power requirements specifi-
cation in the Operation manual.
Do not plug and unplug the DC Power cable on the rear of the laser
to switch DC power to the laser. Switching power under load causes
arcing that will damage the connector and laser control board.
Important
Note:
For further details, please see both the laser and power data sheets on our website
to complete initial setup if using/selecting a SYNRAD power source.
18. Assure the input AC voltage to the DC power supply is physically locked out or disconnected.
19. Connect the negative (black) DC power cable – tighten the M6 fasteners for the black cable to the
laser’s GND terminal to a maximum torque value of 15 ft lb (20 N m). Use two wrenches to prevent the
GND stud from rotating.
20. Positive (red) DC power cable – carefully tighten the M6 fasteners for the red cable to the laser’s +48
VDC Power terminal to a maximum torque value of 5.5 ft lb (7.4 N m).
Note: IF using the Flyer 3D marking head with your laser, reference the Flyer 3D WMPv7 QSG for the re-
mainder of the electrical connections along with the following sections in this guide. Otherwise, see
the note below.
Note: IF using the FH Flyer marking head with your laser, reference the FH Flyer & WMPv6 QSG along with
the following sections in this guide.
Things to know:
P250 lasers incorporate the following wetted materials in the coolant path—nickel-plated brass, copper,
Acetal®, nitrile, Viton®, PBT, Delrin®, Polyethelene, and stainless steel.
Avoid glycol-based additives because they reduce the coolant’s heat capacity and high concentrations may
aect power stability. If you must use glycol, do not add more than 10% by volume. See the Operation and/
or Technical Reference sections in this Manual for detailed information. Glycol is not necessary unless the
chiller is subjected to freezing temperatures.
If you operate your laser or marking head in a dirty or dusty environment, contact
SYNRAD about the risks of doing so and precautions you can take to increase the
longevity of your laser, marking head, and associated optical components.
A risk of exposure to toxic elements may result when certain optical or beam
delivery components are damaged. In the event of damage to laser, marking head,
or beam delivery optics, contact SYNRAD, or the optics manufacturer for handling
instructions.
Caution
Possible equipment
damage

16 p250 Laser Quick Start Guide Version 3.1
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p250 Quick Start Guide
Place the DC power
sense cables here if using
your own power source.
Place the DC sense
cables here if using.
Important
Note:
Only M10 (brass) fas-
teners provided should
be used on all DC-con-
nections on the laser.
48 VDC Power (+)
Ground (-)
Electrical Connections (Continued):
Warning!
Serious
personal
injury
The Quick Start Plug bypasses the laser’s safety interlock function poten-
tially exposing personnel to hazardous invisible infrared laser radiation.
Remove DC power before installing or removing the Quick Start Plug. Please
refer to the (Connecng-laser connecons & the following Quick Start Plug) sec-
ons in the p250 Operator’s Manual.
Quick Start Plug
(QSP)
Control Connections:
21. Connect the Ethernet & BNC (Laser Control) cabling per the SYNRAD marking head QSG. If using the
QSP, see your Laser’s Operators Manual. If you aren’t using a SYNRAD marking head, go to the next
section.

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250
Facilities/Utilities (Air Drop or Gas Purge Port):
22. See gas purge sections in the Technical Reference section of your laser’s Operation Manual for specica-
tions. Locate the gas purge kit shipped with your laser.
23. Assemble the two 90ottings as shown. Set a purge pressure between 13.8–34.5 kPa (2–5 PSI). This
provides just enough positive airow to prevent dust from entering the laser. If a ow-meter is
available, set a ow rate per the purge gas specications in the technical reference chapter within
the laser’s Operation Manual.
Gas Purge Kit
Caution
Possible equipment
damage
Use dry nitrogen or clean, dry ltered air (CDA) to reduce the risk of condensation
damage. Do not use argon or any other gas as a purge gas. The Gas Purge port on
the laser must be connected to a source of nitrogen or clean, dry air only; do not
use any other gases for purging otherwise damage to your laser may occur.
Refer to the purge gas specications in the laser’s Operation Manual.
Final Preparations:
24. See your Marking Head’s Quick Start Guide for WinMark software setup and initial startup after a move
or a new laser. If using a diode pointer and/or this is a new laser and you need to verify performance,
see the Diode Pointer Quick Start Guide and the How to video located on our website.
A gas purge is highly recommended when operating the laser. Purging the laser creates positive-pressure
inside the laser housing that prevents dirt and debris from accumulating on optical surfaces inside the
laser housing. In condensing atmospheres, a gas purge helps to reduce the potential for condensation
damage.

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p250 Quick Start Guide
To
DC Power
Source
To Laser
BNC port
To PC
Ethernet
port
To Chiller
From
Chiller
To User
I/O
TCP/IP
Interface
Power
Supply
Gas
Purge
To Chiller
From Chiller
(not shown)
Finished Setup:
BNC
Connector
DC
Power
PC
Ethernet
port
Important
Note:
Ferrite bead adjacent
to Marking Head.

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25. Ensure that all personnel in the area are wearing protective eye-wear.
26. Assure the red self-adhesive aperture seal s removed.
27. Place a power meter, or appropriate beam block, 61 cm (24 in) from the laser aperture to prevent the
beam from traveling beyond the work area.
28. Connect the Quick Start Plug to the User I/O connector on the rear of the laser and then connect the
PWM signal source) to the BNC connector on the Quick Start Plug.
Note: Before performing the initial start-up sequence, you must first connect the Quick Start Plug or you must
provide the required Remote Interlock and Shutter Open Request signals to the User I/O connector. See
User I/O connections in the Technical Reference chapter for interface details and signal descriptions.
Warning
Serious
personal
injury
External tickle use may cause laser to fire!
Failing to set the chiller above the dew point of the room, by at least two degrees, can
create a condensing environment inside your laser that could void your warranty.
Do not ow coolant through the laser for an extended period of time when the
laser is shutdown.
This causes condensation to form inside the laser which may result in catastrophic
damage to internal optics and electronic circuits.
Caution
Possible
equipment
damage
29. Assure the chiller is not set above the room’s dew point. First, measure the temperature and relative hu-
midity in the area you plan on using your laser. Once you have that data, use the Dew Point table,
located in the laser’s Operation Manual- technical references chapter, to determine your dew point.
If you nd that the dew point temperature, is below your chiller. Do not operate your laser without
adjusting the chiller so that it is above the dew point by at least two degrees, use gas purge, and air
conditioning the room.
Start purge gas ow at a rate of 0.85–1.7 m3/hr (30–60 SCFH, Standard Cubic Feet per Hour) at a pressure not
to exceed 34.5 kPa (5 PSI). If a ow-meter is not available, set a purge pressure between 13.8–34.5 kPa (2–5
PSI). Air conditioning the room will also help.
30. Make note of the current PWM setting. Set the PWM signal source to provide zero percent output
(0.0%).
In dirty or dusty environments; however, it ma be necessary to purge the laser continuously to prevent
contamination of internal optics. As always, if your Pulstar p100/150 laser fails to lase, refer to Trouble-
shooting in the Maintenance/Troubleshooting chapter for troubleshooting information.
Initial Laser startup:
Before your laser is put into service for the rst time, follow this procedure to verify the laser system is oper-
ating at optimum performance.

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p250 Quick Start Guide
31. Turn on the +48 VDC power supply. If using a SYNRAD power supply, please see our website for further
details. If input signals are properly applied to the user I/O connector, or the factory-wired Quick Start
Plug is installed, the INT indicator will illuminate green, the SHT indicator will illuminate blue, and the
RDY LED will illuminate yellow. The TMP indicator will illuminate green if laser temperature is within
safe operating limits. If not, see the troubleshooting section in the laser’s operation manual.
Pulstar RDY and SHT LEDs denote separate control functions. Although the RDY lamp may light while the
SHT LED is Off (Shutter Open Request signal missing), no power is applied to the RF drivers until both RDY
and SHT indicators are illuminated. On cold starts, provide five to ten seconds of tickle before sending PWM
Commands to the laser.
Important
Note:
If your Pulstar OEM p100/150 laser fails to lase, refer to the Troubleshooting
section in the Maintenance/Troubleshooting chapter for information.
Note:
32. Slowly increase power by increasing the duty cycle of the PWM Command signal (up to a maximum of
37.5%). The LASE LED turns red when PWM Command signal pulses are long enough to produce laser
output and the power meter should indicate increased power output.
33. Reduce the PWM duty cycle to 0.0%. The lase indicator on the laser should turn o.
34. Return the PWM duty cycle to original settings if desired. Remove DC power from the laser. Shut o the
chiller or otherwise stop coolant ow through the laser. Shut o gas purge ow to the laser. In dirty or
dusty environments; however, it may be necessary to purge the laser continuously to prevent contami-
nation of internal optics.
Pulsed operation from PWM signal source
Although a tickle signal is not required, you will need to provide PWM Command signal pulses as well as
Remote Interlock and Shutter Open Request input signals to the laser’s User I/O connector. Refer to User I/O
connections in the Technical Reference chapter for details or controlling laser power including PWM Com-
mand signal descriptions.
35. Refer to the above steps for setup and auxillary equipment. Connect your PWM pulse signal source so
that the output is connected to PWM Input (Pin 9) on the User I/O connector and connect the
ground or return of the source to PWM Return (Pin 1).
36. Turn on the chiller and set a temperature set point between 18 °C–22 °C. Verify that the chiller is deliv-
ering a ow rate of 5.7–7.6 LPM (1.5–2.0 GPM) at less than 414 kPa (60 PSI) of pressure. Please refer to
the General Specications in the Technical References Chapter.
37. If needed, start purge gas ow at a rate of 0.85–1.7 m3/hr (30–60 SCFH, Standard Cubic Feet per Hour)
at a pressure not to exceed 34.5 kPa (5 PSI). If a ow-meter is not available, set a purge pressure be-
tween 13.8–34.5 kPa (2–5 PSI).
38. Ensure that your PWM pulse signal source is set to zero percent output (0.0%) at the intended pulse
frequency (repetition rate).
Initial Laser startup (Continued):