Omtech POLAR 350 User manual

POLAR 350
50W DESKTOP LASER ENGRAVER
OWNER’S MANUAL
V20221021
Read Carefully Before Use
Keep for Future Reference

Thank you for choosing the OMTech Polar 350 as your new laser engraver!
Your CO₂ laser engraving machine is intended for personal and professional use. When used in
accordance with these instructions, the Polar is a Class 1 laser system but some components remain
extremely dangerous. Never disable the preinstalled safety devices and always use your laser safely and
responsibly.
Read this manual carefully before operation. It covers the details of correct installation, adjustment,
maintenance, and—most importantly—safe operation of your new laser. It is intended to be used in
conjunction with your engraving software manual, as the software not only provides image design and
conversion but also serves as the main interface to the laser settings and machine controls. You and any
other users of this device should thoroughly understand BOTH manuals before attempting to operate the
laser.
Keep both manuals for future reference and provide them to ANYONE who will install, operate, maintain,
or repair this machine. Both manuals should be included if this device is given or sold to a third party.
If you have any questions after reading these manuals, please contact us and our support department
will address your concerns as soon as possible.
PREFACE

CONTENTS
1. Introduction ....................................................................................................................................................... 1
1.1 General Information ................................................................................................................................... 1
1.2 Symbol Guide .............................................................................................................................................. 2
1.3 Designated Use ........................................................................................................................................... 2
1.4 Technical Specifications ............................................................................................................................. 3
1.5 Components ................................................................................................................................................ 4
2. Safety Information ............................................................................................................................................. 8
2.1 Disclaimer .................................................................................................................................................... 8
2.2 General Safety ............................................................................................................................................. 8
2.3 Laser Safety ................................................................................................................................................. 9
2.4 Electrical Safety ......................................................................................................................................... 10
2.5 Material Safety .......................................................................................................................................... 10
3. Installation ........................................................................................................................................................ 12
3.1 Overview .................................................................................................................................................... 12
3.2 Location Selection .................................................................................................................................... 12
3.3 Unpacking .................................................................................................................................................. 13
3.4 Exhaust System ......................................................................................................................................... 13
3.5 Main Power ............................................................................................................................................... 14
3.6 Cooling System .......................................................................................................................................... 14
3.7 Air Assist .................................................................................................................................................... 14
3.8 Control Computer ..................................................................................................................................... 14
3.9 Wifi ............................................................................................................................................................. 15
3.10 Initial Testing .......................................................................................................................................... 15
3.11 Security .................................................................................................................................................... 16
4. Operation .......................................................................................................................................................... 17
4.1 Overview .................................................................................................................................................... 17
4.2 General Instructions ................................................................................................................................. 17
4.3 Rotary Instructions ................................................................................................................................... 19
4.4 Instructions for Specific Materials .......................................................................................................... 19
5. Maintenance .................................................................................................................................................... 22
5.1 Overview .................................................................................................................................................... 22
5.2 Cleaning ..................................................................................................................................................... 22
5.3 Cooling System .......................................................................................................................................... 24
5.4 Laser Alignment ........................................................................................................................................ 24
5.5 Lubrication ................................................................................................................................................. 24
5.6 Parts Replacement ................................................................................................................................... 24
5.7 Disposal Instructions ................................................................................................................................ 25
6. Contact Information ........................................................................................................................................ 25

1
1.1 General Information
This manual is the designated user guide for the installation, setup, safe operation, and maintenance of
your desktop laser engraver. It is divided into six chapters covering general information, safety instructions,
installation steps, operation instructions, maintenance procedures, and contact information.
ALL personnel involved in the installation, setup, operation, maintenance, and repair of this machine should
read and understand this manual, particularly its safety instructions. Some components are extremely
high voltage and/or produce powerful laser radiation. Substandard performance and longevity, property
damage, and personal injury may result from not knowing and following these instructions.
The Polar 350 works by emitting a powerful laser beam from a glass tube filled with carbon dioxide (CO₂),
nitrogen, and insulating gases; reflecting that beam off three mirrors and through a lens; and using this
focused light to etch designs into certain substrates. The active laser is invisible to the human eye. This
device should never be used while any cover or access panel is open to avoid potentially permanent injury.
When its pass-through is used, care should be taken to avoid possible reflective rays.
The laser tube typically travels along the Y axis during engraving. The first mirror is fixed near the end of
the laser tube, the second mirror travels nearby, and the third mirror is attached to the laser head that
travels along the X axis. The first and second mirrors are located within a protective housing but, because
dust from the engraving process will settle on the 3rd mirror and focus lens, they require frequent cleaning.
With low intensity use, the provided laser tube has an average lifespan around 10,000 hours before
requiring replacement. However, constantly running your laser above 70% of its maximum rated power
can significantly shorten its service life. It is recommended to use settings from 10–70% of the maximum
rated power to enjoy optimal performance and longevity.
The integrated water cooling system must be used with this engraver to dissipate the heat produced by
the laser tube. Similarly, the provided exhaust system must be used in conjunction with an external vent
or dedicated air purifier to remove the dust and gases produced by the engraving process and ensure
compliance with laws and regulations for workplace and environmental air quality. Never operate the
engraver without both of these systems operating properly.
Note that this device broadcasts signals in the radio spectrum as part of its wireless connectivity. Special
shielding or equipment may be necessary to minimize interference with emergency & licensed broadcasting,
particularly in residential areas.
INTRODUCTION

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These items present a risk of serious property damage or personal injury.
These items address similarly serious concerns regarding the laser beam.
These items address similarly serious concerns regarding electricity.
These items address similarly serious concerns regarding fire hazards.
Protective eyewear should be worn by anyone nearby during use.
Nearby objects present a risk of pinching or crushing injury.
This product is sold in conformity with applicable EU regulations.
Safe and legal disposal of this product requires special considerations.
The following symbols are used on this machine’s labeling or in this manual:
The Polar 350 is intended for use engraving signs and other consumer products on applicable substrates.
This laser can process a wide variety of materials including wood and cork, paper and cardboard, most
plastics, glass, cloth and leather, and stone. It can also be used with some specially coated metals. Use of
this system for non-designated purposes or materials is not permitted.
The system must be operated, maintained, and repaired by personnel familiar with the field of use and the
dangers of the machine and the material being engraved including its reflectivity, conductivity, potential
for creating harmful or combustible fumes, etc.
Laser beams are dangerous. The manufacturer and/or seller bear(s) no responsibility and assume(s)
no liability for any improper use of this device or for any damage or injury arising from such use. The
operator is obliged to use this desktop laser engraver only in accordance with its designated use, the other
instructions in its manuals, and all applicable local and national laws and regulations.
1.2 Symbol Guide
1.3 Designated Use

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1.4 Technical Specifications
Model Polar 350
Input Power 110–120 V~ 60 Hz
Power Consumption 600 W
Rated Power 50 W
Expected Service Life
at <40% / 40–70% / >70% Power 11,000 / 10,000 / 8,000 hr.
Laser Wavelength 10.6 μm (10,600 nm)
Laser Tube Diameter 2.2 in. 5.5 cm
Length 35 in. 90 cm
Mirror Diameter 0.8 in. 20.5 mm
Thickness 0.12 in. 3 mm
Focus Lens
Diameter 0.6 in. 15.5 mm
Thickness 0.08 in. 2 mm
Focal Length 2 in. 50.8 mm
Honeycomb Workbed Dimensions 22.5×13.2×0.9 in. 57.1×33.6×2.2 cm
Processing Area
Standard (L×W) 20.1×11.8 in. 510×300 mm
Trayless (L×W) 13.7×8.2 in. 350×210 mm
Rotary 1 0–9.4×2.4–2.9 in. 0–240×60–75 mm
Rotary 2 0–9.4×1.2–2.3 in. 0–240×30–60 mm
Front/Back Pass-Through Area (L×H) 14.1×0.19 in. 360×5 mm
Max. Processing Speed 19.7 ips 500 mm/s
Max. Material
Thickness
Standard 0.59 in. 1.5 cm
Without Workbed 1.9 in. 5 cm
Max. Resolution 1000 dpi
Min. Letter Size 0.04×0.04 in. 1×1 mm
Mainboard Ruida 6442S (RDC6442S-B)
Integrated
Water Chiller
Capacity 1.6 qt. 1.5 L
Flow Rate 142 gph 540 L/hr.
Integrated
Air Assist
Port Diameter 0.4 in. 10 mm
Air Flow 18.8 cfm 533 L/min.
Integrated
Digital Camera
Max. Resolution 5 MP
Field of View 20.1×11.8 in. 51×30 cm
Accuracy ±0.04 in. ±1 mm
External
Exhaust Fan
Rated Power 60 W
Port Diameter 5.9 in. 150 mm
Air Flow 282/353 cfm 480/600 m³/hr.
Req. Operating
Environment
Max. Humidity 20–85%
Temp. Range 40–104°F 5–40°C
Provided Operating Software RDWorks
Compatible Operating Software CorelLaser, CADLaser, LightBurn
Certification CE, FDA
Dimensions 38.2×22.3×9.2 in. 97×56.5×23.4 cm
Net Weight 104 lb. 47 kg

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1.5 Components
Top View
A. Exhaust Fan—This fan pulls out gases and airborne debris from the workbed. To minimize noise, it only
activates with the laser.
B. Cover Interlocks—These switches automatically pause work if the cover is opened.
C. Rotary Plug—This small aviation plug connects to the provided rotary axes to provide them with power
and command signals.
D. Wifi Card—The 2.4 GHz wireless terminal device located behind the central part of the rear panel
provides wifi connectivity for your engraver.
E. Laser Power Supply—This device transforms standard electricity into the extremely high voltage charge
necessary for the laser tube.
F. Y-Axis Rail—The Y-axis rail supports the movement of the laser tube and X-axis rail up and down the
workbed.
G. Rotary Switches—These two switches direct the mainboard and power supply to provide power and
commands to the Y-axis rail or to a rotary axis connected to the rear aviation plug.
H. Laser Tube—This CO₂-filled glass tube is mounted beside the X-axis rail within a protective housing. They
normally move together along the Y-axis rail. The laser’s connection to its power supply is extremely high
voltage and extremely dangerous.
I. Ammeter—This digital display provides the current of the laser in milliamps (mA).
J. Air Assist—This small air compressor directs pressurized air through a narrow tube to the laser head. To
minimize noise, it only activates with the laser.
K. 1st & 2nd Mirrors—The protective housing for these fixed mirrors move with the laser tube and X-axis
rail to allow the laser beam to travel along the Y axis.
Main Components
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L. Laser Head—The laser head holds the 3rd mirror, focus lens, and air assist outlet and directs the laser
beam down into your materials. Its components are normally protected by a rectangular shell that locks
magnetically into place.
M. X-Axis Rail—The X-axis rail supports the movement of the laser head left and right across the workbed.
When using either of the rotary axes, this rail should be positioned to connect the matching arrows.
N. Tray Interlock—This switch stops your laser when the debris tray is removed. For pass-through and
rotary engraving, close this switch using the nearby bracket.
O. Water Pump—This pump circulates your water or laser-safe coolant through the laser tube to keep it
cool and stable.
P. LED Light Strips—These integrated lights help keep your workbed easy to see.
Q. Camera—This fisheye camera helps you position your designs precisely.
R. Water Tank—This tank helps keep your laser tube cool and stable. It arrives full of OMTech antifreeze but
can also be replaced with distilled water.
S. Mainboard—This circuit board located under the left panel controls the engraving process, responding
to commands from your computer’s engraving software.
T. Honeycomb Workbed—The workbed supports your material up to 0.59 inches (15 mm) thick while
allowing effective airflow. It can also be removed to fit thicker materials or to use the rotary axes.
U. Start Button and Laser Status—This button begins, pauses, and resets the engraving process. The ring
around it changes color to indicate your engraver’s current status:
Status Color Meaning
Blue Active Laser
Green Ready to Work
Red Error or Malfunction
Front View
A. Cover—This acrylic window shields you and others from the laser and its reflections, allowing monitoring
of the engraving process. However, you should never stare continuously at the laser during operation,
even through the window.
B. Debris Tray—This tray is easily removable to clean debris after use and to install or remove the honeycomb
workbed. It can also be left open to function as the front pass-through.
C. Laser Key—This lock turns the laser power supply on and off, helping ensure only approved operators
can use your laser.
D. Legs—These padded legs help avoid any damage to your table or counter.
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Rear View
A. Beam Attenuator—This dial provides a master power control for your engraver. It should be turned
completely clockwise to enable your software to use the engraver’s full power range.
B. Remote Interlock Connector—This port functions as a second key necessary to activate the laser tube.
Insert the provided switch to enable the laser or remove it to completely disable the laser.
C. Power Switch—This switch turns on the engraver’s mainboard, cooling system, LED lighting, and wireless
card and places the exhaust fan and air assist into standby mode, ready to activate with the laser. It
should always be turned off between sessions.
D. Power Socket—This socket connects to your main power supply and grounds your machine’s electronic
components.
E. Exhaust Fan—This fan pulls out gases and airborne debris from the workbed, sending it through your
vent to a window or air purifier.
F. Rear Pass-Through—This door can be unsealed to allow larger pieces of material to be fed into or across
the workbed. Additional care must be taken to avoid exposure to the laser beam and its reflections when
it is open.
G. Camera Port—This USB port connects the engraver’s camera to your control computer and engraving
software.
H. Computer Port—This USB port connects the engraver’s mainboard to your control computer and
engraving software.
I. Ethernet Port—This port allows a fast connection between the engraver’s mainboard and your control
computer either directly or via the internet.
Laser Head
A. 3rd Mirror—This fixed mirror transfers the laser from
the 2nd mirror at the end of the X-axis rail downward
to the focus lens.
B. Focus Lens—This 15.5 mm lens directs and focuses the
laser beam to its point of contact with your material.
C. Air Assist—This tube provides the pressurized air from
its compressor to kill sparks and minimize dust and
gases.
D. Laser Beam—The engraving laser itself is invisible but
highly dangerous. Avoid any direct exposure to your
skin or eyes.
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Rotary Axes
A. Rotary Aviation Plug—This plug should be covered during normal engraving. When you will use the
rotary axes, the 4-pin connection will power and direct the rotary motor.
B. Rotary Switches (covered)—These switches redirect power and control from the Y-axis motors to the
rotary axis connection and back again.
C. Tray Interlock—This switch must be held closed by the nearby bracket during rotary engraving. Remember
to reenable the switch by removing the bracket after your work.
D. Alignment Arrows—These arrows indicate the correct position of the laser and the X-axis rail for use
with Rotary Axis 1 (on the right) or Rotary Axis 2 (on the left).
E. Rotary Axis 1—This four-wheel rotary axis is installed into the bottom left corner of the open bay as
shown. The arrow at the end of the laser tube casing should be aligned with the arrow marked 1 on the
right side.
F. Rotary Axis 2—This four-wheel rotary axis is also installed into the bottom left corner of the open bay as
shown but the arrow at the end of the laser tube casing should be aligned with the arrow marked 2 on
the left side.

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2.1 Disclaimer
Your Polar may differ somewhat from those shown in this manual due to options, updates, etc. Please
contact us if your engraving machine came with an outdated manual or if you have any other questions.
2.2 General Safety Instructions
• Your Polar 350 should come with warning labels in the following locations:
If any of these labels is missing, illegible, or becomes damaged, it must be replaced.
• Use this laser engraving device only in accordance with all applicable local and national laws and
regulations.
In the United States, the Polar’s wireless network is a certified transmitter module that emits radio
signals in compliance with 47 CFR 15 for commercial locations but may require operators to provide
additional equipment in residential areas to avoid interfering with emergency and FCC licensed
broadcasts. Similarly, the Safe Use of Lasers (Z136) standards published by the American National
Standards Institute do not have the force of law, but adherence to its provisions may be required by
some companies or local authorities to minimize risk and liability. In particular, it may be necessary
in commercial settings to formally designate a laser safety officer, to post warning signs in areas with
active lasers, and to document that all operators of laser equipment have been properly trained.
• Use this device only in accordance with this instruction manual and the manual for the engraving
software included with it. Only allow this device to be installed, operated, maintained, repaired, etc.
by others who have also read and understood both manuals. Ensure that this manual and the software
manual are both included with this device if it is ever given or sold to a third party.
• DO NOT leave this device unattended during operation. Observe the device throughout
operation and, if anything seems to be operating strangely, immediately cut off ALL
power to the machine and contact either our customer service or your dedicated
repair service. Similarly, ensure the device is FULLY turned off after each use.
SAFETY INFORMATION

9
•DO NOT allow minors, untrained personnel, or personnel suffering from physical or mental impairment
that would affect their ability to follow this manual and the software manual to install, operate, maintain,
or repair this device.
• Any untrained personnel who might be near the device while it is in operation MUST be informed that
it is dangerous and fully instructed on how to avoid injury during its use.
• Always keep a fire extinguisher, water hose, or other flame retardant system nearby
in case of accidents. Ensure that the local fire department's phone number is clearly
displayed nearby. In the case of a fire, cut electrical power before dousing the flame.
Familiarize yourself with the correct range for your extinguisher before use. Take
care not to use the extinguisher too close to the flame, as its high pressure can
produce blowback.
2.3 Laser Safety Instructions
When used as instructed, the Polar 350 is a Class 1 laser system safe for users and bystanders. However the
invisible engraving laser, the laser tube, and its electrical connections remain extremely dangerous. Used
or modified without care, they can cause serious property damage and personal injury including but not
limited to the following:
• The laser will easily burn nearby combustible materials
• Some working materials may produce radiation or harmful gases during processing
• Direct exposure to the laser will cause bodily harm including serious burns and
irreparable eye damage
As such,
• DO NOT modify or disable this device's provided safety features except as specifically instructed
elsewhere in this manual. Do not modify or disassemble the laser and do not use the laser if it has
been modified or disassembled by anyone except trained and skilled professionals. Do not activate the
laser without its focus lens. Dangerous radiation exposure and other injury may result from the use of
adjusted, modified, or otherwise incompatible equipment.
• NEVER leave any part of the Polar open during operation except (when needed) the pass-through doors.
Never interfere with the laser beam, do not place any part of your body in any part of the laser path
during operation, and never attempt to view the laser directly. When using the pass-through doors
or otherwise risking exposure to the laser beam, take measures to protect yourself from potentially
reflected laser beams including the use of personal protective equipment such as protective eyewear
specially designed to filter the specific wavelength of your engraver's laser with an optical density (OD)
of 6+.
• DO NOT stare or allow others to stare continuously at the laser beam during operation even when the
cover is closed and/or wearing protective eyewear.
• ONLY use this engraver if its automatic shutoffs are working properly. Never disable any of these shutoffs
except as specifically instructed elsewhere in this manual. When you first get this engraver and if you
subsequently notice any problems, test them (see below) before undertaking any other work. Do not
continue use if the shutoffs do not occur. Turn off the device and contact technical support or your repair
service.
• ONLY use this engraver in a flat and stable location. Using it on an unstable surface or at a tilted position
may cause the laser to deviate from its intended path or permanently damage internal components of
the device.

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• DO NOT ever under ANY circumstances use this laser engraver if the water cooling system is not working
properly. Always visually confirm that water is flowing through the entire system before turning on
the laser tube. Immediately stop use if the water cooling system malfunctions. If the system pauses
operation because the coolant has reached its maximum temperature of 122°F (50°C), allow at least
thirty minutes for the system to cool before resuming operation.
• DO NOT use generic coolant or antifreeze in your cooling water, as they may leave corrosive residues and
solidify inside your hoses and piping, causing malfunctions and even explosions. Use custom laser-safe
formulations or use and store your engraver in a climate-controlled area.
• DO NOT leave potentially combustible, flammable, explosive, or corrosive materials below the laser or
nearby where they might be exposed to the direct or reflected laser beam.
•DO NOT use or leave sensitive EMI equipment nearby. Ensure the area around the laser is free of strong
electromagnetic interference during any use.
• ONLY use this machine for working the materials described in the Material Safety section of this manual.
The laser settings and engraving process must be properly adjusted for specific materials.
• Ensure the area is kept free of other airborne pollutants, as these might pose a similar risk of reflection,
combustion, etc.
2.4 Electrical Safety Instructions
• ONLY use this device with a compatible, stable, and grounded power supply with less
than 5% fluctuation in its voltage. Do not use with an ungrounded 3 to 2 prong adapter.
The device’s grounding should be checked regularly for any damage to the line or loose
connections.
• DO NOT connect other devices to the same circuit, as the laser system may require its full amperage. Do
not use with standard extension cords or power strips. Use only surge protectors rated over 2000J.
• The work area around this laser engraving device should be kept dry, well ventilated, and environmentally
controlled to keep the ambient temperature between 40–104°F (5–40°C). For best results, keep the
temperature at 75°F (25°C) or below. The ambient humidity should be between 20–85%.
• Adjustment, maintenance, and repair of the electrical components of this device must be done ONLY
by trained and skilled professionals to avoid fires and other malfunctions, including potential radiation
exposure from damage to the laser components. Because specialized techniques are required for testing
the electrical components of this marking system, it is recommended such testing only be done by the
manufacturer, seller, or repair service.
• Unless otherwise specified, ONLY undertake adjustment, maintenance, and repair of this device when it
is turned off, disconnected from its power supply, and fully cooled.
2.5 Material Safety Instructions
• Users of this laser engraving machine are responsible for confirming that materials to be processed
can withstand the heat of the laser and will not produce any emissions or byproducts either harmful to
people nearby or in violation of local or national laws or regulations. In particular, do not use this device to
process polyvinyl chloride (PVC), teflon, or other halogen containing materials under any circumstances.
• Users of this laser engraver are responsible for ensuring that every person present during operation has
sufficient PPE to avoid the injury from the emissions and byproducts of the materials being processed. In
addition to the protective laser eyewear described above, this may require goggles, masks or respirators,
gloves, and other protective outer clothing.
• DO NOT operate the laser without its air assist.
• Users of this laser engraver are responsible for ensuring that otherwise safe dust and debris created
during use is fully cleaned afterwards. Dust allowed to build up on the surfaces of the main bay and the
tray under it is a fire hazard that can easily be ignited by the heat of the laser.

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• DO NOT ever under any circumstances use this laser engraver if the exhaust system is not working
properly. Always ensure that the exhaust fan can remove the dust and gas produced by the engraving
process in accordance with all applicable local and national laws and regulations. Immediately stop use
if the exhaust fan or vent pipe malfunctions.
• Users must exercise special caution when working with conductive materials as buildup of their dust
and ambient particles may damage electrical components, cause short circuits, or produce other effects
including reflected laser radiation.
This machine can be safely used with the following materials:
• Cardboard
• Ceramics, including Dishes, Tile, etc.
• Glass
• Leather
• Paper & Paperboard
• Some Plastics
• Nylon (Polyamide, PA, etc.)
• Polyethylene (PE) and High-Density Polyethylene (HDPE, PEHD, etc.)
• Biaxially-Oriented Polyethylene Terephthalate (Mylar, Polyester, etc.)
• Polyethylene Terephthalate Glycol (PETG, PET-G, etc.)
• Polyimide (PI, Kapton, etc.)
• Polymethyl Methacrylate (PMMA, Acrylic, Plexiglass, Lucite, etc.)
• Polyoxymethylene (POM, Acetal, Delrin, etc.)
• Polypropylene (PP, etc.)
• Styrene and Acrylonitrile Butadiene Styrene (ABS)
• Rubber
• Stone, including Marble, Granite, etc.
• Textiles, including Cotton, Suede, Felt, Hemp, etc.
• Wood, including Cork, MDF, Plywood, Balsa, Birch, Cherry, Oak, Poplar, etc.
See §4.4 for recommended parameters for the most commonly engraved materials.
This machine CANNOT be used with the following materials or with any materials which include them:
• Artificial Leather containing Hexavalent Chromium (Cr[VI]), due to its toxic fumes
• Astatine, due to its toxic fumes
• Beryllium Oxide, due to its toxic fumes
• Bromine, due to its toxic fumes
• Chlorine, including Polyvinyl Butyral (PVB) and Polyvinyl Chloride (PVC, Vinyl, Cintra, etc.), due to its toxic
fumes
• Fluorine, including Polytetrafluoroethylenes (Teflon, PTFE, etc.), due to its toxic fumes
• Iodine, due to its toxic fumes
• Metals, due to their conductivity and reflectivity
• Phenolic Resins, including various forms of Epoxy, due to their toxic fumes
• Polycarbonate (PC, Lexan, etc.), due to its toxic fumes
For all other materials, if you are unsure about its safety or laserability with this device, seek out its material
safety data sheet (MSDS). Pay especial attention to information about safety, toxicity, corrosiveness,
reflectivity, and reaction(s) to high heat. Alternatively, contact our support department for further guidance.

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3.1 Installation Overview
A complete working system consists of the laser engraving machine, its integrated air assist and water
chiller, its vent and exhaust fan, its control computer, all applicable connection cables, and the laser key.
The cabinet can receive designs and commands from the control computer directly from its USB cable or
remotely from its wireless network or ethernet cable. The designs can be applied to flat surfaces resting
on the honeycomb workbed or to round surfaces supported on the provided rotary device. Users can
configure other additional accessories (such as a fume extractor) to suit their needs.
Use only the hardware, wiring, and power sources that came with or are compatible with
this device. Installing equipment that your device is not designed to work with can lead
to poor performance, shortened service time, increased maintenance costs, property
damage, and personal injury.
Please note the specific requirements of your system's installation. Every customer must understand these
notes before installation to execute a proper setup and achieve safe laser performance. If you have any
installation questions or problems, contact our technicians and customer support team.
Any auxiliary equipment must be adjusted to the base machine. Queries may be directed to the dealer or
manufacturer of such equipment.
3.2 Location Selection
Before you install your engraver, select an appropriate location for its use. Be sure that it meets all of the
requirements discussed in the Safety Information above.
The location should be stable, level, dry, and climate controlled to ensure an ambient temperature of 40–
104°F (5–40°C) and an ambient humidity of 20–85%. In particular, the temperature and humidity together
should not be close to the dew point. It is also advisable to use a windowless room or to use blinds and/
or curtains to avoid exposure to the potential additional heat of direct sunlight. The location should be
free of dust and other airborne pollutants and well ventilated enough to process any fumes produced by
the engraving process in accordance with all applicable laws and regulations. Depending on the materials
to be processed, this may require construction of a dedicated ventilation system. It should be away from
children; combustible, flammable, explosive, or corrosive materials; and sensitive EMI devices. The power
cord should be plugged into a compatible and stable power source via a grounded 3-prong outlet. No other
item should be drawing current from the same circuit. There should be firefighting equipment nearby and
the local fire department's phone number should be clearly displayed.
It is highly recommended to have extra storage area nearby to avoid placing any object on or directly
adjacent to the machine, which could become a fire or laser hazard.
INSTALLATION

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3.3 Unpacking Your Engraver
Your new Polar 350 arrives in a wooden crate with its accessories (including this manual) packaged inside the
main bay. You should have placed the crate in a spacious flat area for unpacking, ideally near where you plan
to operate the machine permanently. Use at least two people to move and adjust the engraver’s position to
help keep it level and avoid any sharp or sudden movement.
Step 1 Open the top of the crate. Remove the honeycomb workbed and surrounding foam insulation.
Step 2 Carefully remove the other packaging and foam insulation from the sides and set them aside. With
at least one other person, use the two straps around the engraver to lift it out of the crate and move
it to a sturdy table or countertop.
Step 3 Carefully remove the straps and plastic packaging from around the engraver.
Step 4 Open the cover and confirm that you have received all of the following accessories: Two 4-wheel
rotary axes with an aviator connection cord and backup aviator plug; a duct fan, its wired and remote
controls, an adapter ring, 2 exhaust pipes, and 3 hose clamps; five 3 mm basswood, cardboard, and
acrylic blanks; a main power cord; an Ethernet cable; two USB cords; a USB flash drive with engraving
software; a storage box with cotton swabs, tape, 2 rulers, 2 laser keys, interlock connection, and
sets of hex wrenches, target discs, and O-rings; and this manual.
Step 5 Carefully remove any remaining interior packaging and stays—including the strap around the laser
head—and set them aside. The laser tube is a highly fragile object and should be handled delicately
and as little as possible.
Step 6 Pull out the debris tray. The honeycomb bed has inch and metric rulers on opposite sides. Place the
one you prefer to use facing up and slide it into place. Slide the tray back in underneath it.
Never attempt to place or remove the honeycomb bed through the main cover. Always
remove it along with the debris tray instead.
Step 7 You may keep the packaging in case of future return but, if you dispose of it or any accessories, be
sure to do so in compliance with applicable waste disposal regulations.
3.4 Exhaust System Installation
The provided duct pipes extend to a total length of 16′4″ (5 m). Plan out the route that they will take from your
engraver’s fan to a dedicated purifier or—if your engraving fumes and debris will not hazardous and meet
local and national air safety standards—to any window or exterior vent. Generally speaking, the straighter
you can keep the pipes between your engraver and their outlet, the better your system’s ventilation will be
and the less dust and debris will build up within the pipes over time.
Slide the two small hose clamps onto the smaller exhaust pipe. Attach one end directly onto the rim
surrounding the exhaust fan behind the laser. Use a screwdriver to tighten one of the clamps around this
connection. Attach the other end of the pipe to the inlet side of the 60W duct fan using the provided
adapter ring. Tighten the second clamp around this connection.
Slide the large hose clamp onto the larger exhaust pipe. Attach one end of the pipe to the outlet side of the
duct fan and tighten the clamp around this connection. Attach the other end of the pipe to a fume extractor
or vent it into the open air outside your work area.
Connect the duct fan to power, ideally on a separate circuit from the one that will be used to power the laser
itself. Turn it on and confirm that it operates at both speeds.
NEVER operate the laser if the exhaust system is not removing the fumes and dust produced by
your materials out of your work area. Always research materials before use and never operate
the laser on any that can produce corrosive, hazardous, or even deadly fumes.

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3.5 Main Power Connection
Confirm that the voltage on the label above the laser’s power socket matches your local power supply. Insert
the interlock connection and power cord into their sockets on the rear side of the machine. (If the interlock
connection does not fit, pull back its outer casing, align its holes with the pins, and try again.) Connect the
other end of the power cord directly to a grounded outlet or to a surge protector rated over 2000J that is
itself connected to a grounded outlet. Do not connect the other end to any standard extension cord, power
strip, or ungrounded adapter. For best results, have a trained technician verify that your power supply has
less than 5% fluctuation and that your outlet is properly grounded with less than 5Ω resistance along the
line.
Poor grounding WILL cause equipment failure and create a serious electrical shock hazard. The
manufacturer and/or seller bear(s) no responsibility and assume(s) no liability for any damage,
accidents, or injuries caused by bad grounding connections.
3.6 Cooling System Inspection
Open the cover and confirm that the plastic tank to the right of your main bay is full. The integrated water
pump should arrive with about 1.6 quarts (1.5L) of OMTech coolant already in place. This should not require
replacement during the first year of service, but refill it if the tank ever seems below two-thirds full before
activation.
Flip the engraver’s main power switch and confirm that the coolant begins to flow out of its tank, through
the laser tube, and back into the tank.
NEVER operate your engraver if the cooling system is not functioning properly.
3.7 Air Assist Inspection
Your air assist should also arrive preinstalled and correctly wired. Confirm that pressurized air begins to blow
from the laser head when the engraver is connected to power and turned on.
If any tubing or wiring needs to be adjusted or reconnected, turn off the machine and disconnect it
from power before making any such adjustment.
3.8 Control Computer Connection
Your computer comes with a copy of Ruida Technology’s RDWorks software and a digital copy of its official
instruction manual, both located on the USB flash disk provided with the other accessories. You can also
download a free copy of the most recent version of RDWorks from our website at www.omtechlaser.com/
pages/software-download or from Ruida’s own website at www.rdacs.com/en. See the software manual
for details on the requirements for the control computer.
To configure your control computer and software for the Polar 350,
1. Connect your computer to the engraver using the provided Ethernet cable or one of the provided USB
cables. Use the other USB cable to connect your computer to the port marked “Camera”.
2. Connect the USB flash drive to a third port or to a USB hub connected to your computer. Alternatively,
move all of its files to a folder on your computer.

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3. Install and open RDWorks on your control computer.
4. In RDWorks, go to Model (ALT+M) on the main toolbar and select “RDC6442S”.
5. Go to File (ALT+F) on the main toolbar and select Vendor Settings. Enter the default password rd8888.
Select Open. Load the file Manufacturer _ parameters.RDVSet from the USB or the folder you created
on your computer.
6. Go to Config (ALT+S) and select System Settings. Select Import Soft Para. Go to the USB or your folder
and load the file Software _ parameter.cfg.
7. On the System Work Platform on the upper right side of the main screen, change the tab from Work to
User. Select Open. Go to the USB or your folder and load the file User _ parameters.RDUSet.
8. Configure the camera by going to Laser Work at the lower right and changing the Position from “Current
Position” to “Absolute Coordinates”.
9. On the Canvas Tools toolbar, click the unlabeled radio box and enable the canvas function and controls.
Click on the unlabeled gear icon nearby to open the Canvas Para Settings submenu. Select Import
Calibration and go to the USB or your folder. Load the file Camera _ calibration _ le.calx.
Familiarize yourself with the software’s image design features and laser control settings before using it to
operate the laser. For help configuring your engraver for use with LightBurn or other engraving software,
contact our customer support team for complete details.
3.9 Wifi Configuration
Check your local wifi networks to see if “Polar350” already appears. If so, log into it using the default
password 123456abc.
If it does not appear, you may need to reconfigure your own device’s TCP/IP address. The default address
of the Polar 350’s wireless network is 192.168.1.100. You will need to set your computer’s wireless network
card to use a similar but not identical address. Use 192.168.1 for the first three sections and choose a unique
value for the last section. Typically any value from 2–252 except 47 and 100 should be ok but avoid any other
values that are already being used by your other networked devices. Use the subnet mask 255.255.255.0.
Enable wireless control in RDWorks by going to Device at the lower right. If you cannot find it, go to
View (ALT+V), deselect System Work Platform to remove it from view, and make sure that Process Control
Bar is selected for viewing. If Device is still not visible at the lower right, use your mouse to raise the Laser Work
menu until Device becomes visible. Click Setting. In the submenu that will open, select Add on the bottom
left. Toggle the selection to Web, enter the IP address 192.168.1.100 if it is not automatically generated,
and select OK. The wifi connection should automatically be set for use. Click Exit, confirming and saving
your changes. You can now use Device’s drop down menu to switch between using the cable connection
(“USB:Auto”) and the wireless connection (“IP:192.168.1.100”).
3.10 Interlock Testing
Because of the risk of blindness, burns, and other injury from direct exposure to the invisible engraving
beam, this device shuts off the laser automatically when parts of its protective housing are opened.
Cover Shutoffs (Interlock)
You should test that the cover shutoffs activate properly before conducting any other work on your machine.
Turn on the engraver and duct fan. Confirm that the cooling system has activated. Place a piece of laserable
scrap material onto the workbed, insert and turn the laser key, and close the cover. Create or load a simple
design into RDWorks and begin engraving. Check that the air assist and exhaust fan activate with the laser.

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Taking care not to expose yourself to seeing or being hit by any possible reflected laser light, open the cover
as little as possible. The laser should pause automatically and then restart once the cover is closed again. If
the laser continues to engrave the design while the cover is raised, the automatic shutoffs are not working
and must be repaired before the engraver can be used. Turn off the machine and contact our technical
support team.
Tray Shutoff (Interlock)
After ensuring that the cover protection works, you should also test that the tray shutoff activates. Perform
the same procedure as before but, instead of opening the cover, open the debris tray. The laser should
stop completely. If it continues to engrave the design while the debris tray is open, the automatic shutoff is
not working and must be repaired before the engraver can be used. Turn off the machine and contact our
technical support team.
This is the only safety feature that should ever be circumvented. You will need to disable this switch—
located at the back right side of the main bay near the ammeter—when engraving thick materials or while
using the front pass-through or the rotary axes. To do so, remove the debris tray and the workbed. Move the
switch into a closed position and hold it there by sliding the nearby metal bracket to the right. Never leave
the switch in this position after completing your work. Reenable the switch before leaving the work area.
Rear Key (Interlock Connector)
After ensuring that the cover and tray interlocks work properly, you should test that the rear key functions
correctly. Perform the same procedure as before but, instead of opening the cover or tray, remove the
interlock connector from its socket beside the power switch. The laser should stop completely. If it continues
to engrave the design without the rear key in place, the automatic shutoff is not working and must be
repaired before the engraver can be used. Turn off the machine and contact our technical support team.
Water Shutoff
Because of the danger posed by an uncooled laser tube, this engraver also shuts off the laser automatically
when its sensors do not detect the correct water flow. This can be tested by crimping or tying the water hoses
and attempting to fire the laser. If you perform this test, be careful not to damage the hoses themselves
and to only briefly activate the laser. If the laser does fire, the automatic shutoff is not working and must be
repaired before the engraver can be used. Turn off the machine and contact our technical support team. If
the laser does not fire, the automatic shutoff is working correctly. Release the two hoses and run the water
system for a minute or two, checking that no damage or leaks have occurred.
3.11 Security
For your own safety and that of passersby, this engraver requires two keys to provide power to the laser tube,
the interlock connector at the back of the machine and the laser power key in the front. Operators should
always remove at least one of these between uses to prevent unauthorized operation of the machine. Only
leave them in place if the work area itself is completely secure and inaccessible to any children.

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4.1 Operation Overview
Operate the Polar 350 only in accordance with all the instructions provided in this manual.
Failure to follow the proper guidelines detailed here can result in property damage and personal
injury.
This section will address only some of the options and features provided by the operation software. Before
beginning to use the machine, make sure that you have read this entire manual (particularly the Safety
Information above), the separate software manual, and any and all warnings provided on the machine
itself.
4.2 General Operation Instructions
Step 1 Create your design that you'd like to engrave. You can do this directly in your engraving software
or use any other graphics program.
Step 2 Turn on your duct fan and any fume extractor or other ventilation equipment.
Step 3 Insert the interlock connector—if you don’t normally leave it in place—and turn on your engraver
using its rear power switch. Confirm that the cooling system and internal lights have activated.
Step 4 Confirm that your control computer has a connection to the Polar, either directly through the
provided cables or wifi connection or via the internet. Load your design into your engraving
software.
Step 5 Confirm the thickness of your material with the provided ruler and place a sample piece into the
main bay. The standard location is in the top left corner of the workbed. This can be changed
by moving either your design or the origin position in your software. Confirm that both rotary
switches are flipped down to their standard position and then close the cover.
For pieces thicker than 0.59 inches (15 mm), you will need to open the tray and remove the
honeycomb workbed to provide the extra space. For pieces longer than 20 inches (510 mm),
you should open the rear pass-through door, remove the debris tray and workbed, hold the tray
interlock switch back using the adjacent metal bracket, and replace the workbed.
DO NOT insert anything through the pass-through doors other than your material. As
you work, confirm the ventilation system is removing all dust and fumes. If it cannot,
cease use of the pass-through for that material unless sufficient PPE is worn by everyone
nearby.
For round pieces, you will need to use a rotary axis (see §4.3 below).
Step 6 Focus your laser using the Offset parameter in your software. For the 2-inch focus lens, this value
will be 17 minus the thickness of your material in mm:
OPERATION