Omtech USB3020N User manual

USB3020N
Desktop Laser Engraver
User Manual
Read Carefully Before Use
Keep for Future Reference
V20230315

Thank you for choosing our laser equipment.
Your CO2 laser engraving machine is intended for personal and professional use. When used in accordance with
these instructions, it comprises 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. You and any other users of this device should thoroughly
understand the manual before attempting to operate the laser.
Keep the manual for future reference and provide it to ANYONE who will install, operate, maintain, or repair this
machine. The manual should be included if this device is given or sold to a third party.
If you have any questions after reading the manual, 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 Specifi cations ...................................................................................................................................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 ......................................................................................................................................................12
3.4 Water Cooling System ...................................................................................................................................13
3.5 Exhaust System ..............................................................................................................................................14
3.6 Electrical Grounding ......................................................................................................................................14
3.7 Main Power ....................................................................................................................................................15
3.8 Air Assist ........................................................................................................................................................15
3.9 Control Computer ..........................................................................................................................................15
3.10 Initial Testing ...............................................................................................................................................20
4. Operation ..............................................................................................................................................................21
4.1 Overview ........................................................................................................................................................21
4.2 General Instructions .......................................................................................................................................21
4.3 Instructions for Specifi c Materials .................................................................................................................25
5. Maintenance .........................................................................................................................................................27
5.1 Overview ........................................................................................................................................................27
5.2 Regular Maintenance .....................................................................................................................................27
5.3 Laser Path Alignment .....................................................................................................................................29
5.4 Parts Replacement ..........................................................................................................................................32
5.5 Troubleshooting .............................................................................................................................................33
5.6 Disposal..........................................................................................................................................................33
6. Contact Information .............................................................................................................................................33

1
This manual is the designated user guide for 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.
Your laser engraver works by emitting a powerful laser beam from a glass tube fi lled with insulating carbon dioxide
(CO₂). The laser beam refl ects off three mirrors and passes through a focus lens, after which the focused light can
etch designs into certain substrates. The fi rst mirror is fi xed near the end of the laser tube, the second mirror travels
along the machine's Y axis, and the third mirror is attached to the laser head that travels along the X-axis. Because
some dust from the engraving process settles on the mirrors, they require frequent cleaning. They also require
periodic readjustment using their attached positioning screws to maintain proper laser path alignment. A water
cooling system—typically a pump or chiller—must be used with this engraver to dissipate the heat produced by the
laser tube. Similarly, an exhaust system—typically either an external vent or a dedicated air purifi er—must be used
to remove the dust and gases produced by the engraving process.
With low intensity use, the provided laser tube has an average lifespan around 2000 working hours before requiring
replacement. The provided power supply should also last around 2000 hours under similar conditions. However,
constantly running your laser above 70% of its maximum rated power can signifi cantly shorten their service lives. It
is recommended to use 10–70% of the full rated capacity to enjoy optimal performance and longevity.
Note that this is a high-voltage device and, as a safety precaution, it is recommended to only touch its components
with one hand at a time during use.
Note that the active laser is invisible to the human eye. Never operate this device while any cover is open to avoid
potentially permanent injury.
Note also that the water cooling system and exhaust system are both absolutely essential to the safe use of this device.
Never operate the engraver without both of these systems working correctly. Cooling water should always be kept
clean and around room temperature, and the exhaust system should always comply with all applicable laws and
regulations for workplace and environmental air quality.
1.1 General Information
1. Introduction

2
The following symbols are used on this machine’s labeling or in this manual:
These items present a risk of serious property damage or personal injury.
These items address similarly serious concerns with regard to the laser beam.
These items address similarly serious concerns with regard to electrical components.
These items address similarly serious concerns with regard to fi res.
Protective eyewear should be worn by anyone around this machine during operation.
This product is sold in conformity with applicable EU regulations.
This product contains electrical components that should not be disposed of with regular garbage.
This machine 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 nondesignated
purposes or materials is not permitted.
The system must be operated, maintained, and repaired by personnel familiar with the fi eld of use and the dangers
of the machine. The material being engraved must be deemed safe for laser exposure, including its refl ectivity,
conductivity, and 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 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 manual, and all
applicable local and national laws and regulations.
1.2 Symbol Guide
1.3 Designated Use

3
1.4 Technical Specifi cations
Model USB3020N
Laser Tube
Diameter 1.97 in. 50 mm
Length 28.3 in. 720 mm
Focus Lens
Diameter 0.47 in. 12 mm
Thickness 0.08 in. 2 mm
Focal Length 2 in. 50.8 mm
Mirror
Diameter 0.79 in. 20 mm
Thickness 0.12 in. 3 mm
Input Power 110–120 V~ 60 Hz
Power Consumption 360 W
Rated Power 40 W
Expected Service Life
at <40% / 40–70% / >70% Power 2000/1200/600 hr.
Laser Wavelength 10640 nm
Processing Area 12×8 in. 300×200 mm
Max. Processing Speed 11.8 ips 300 mm/s
Max. Acceleration
X-Axis 78.7 ips² 2000 mm/s²
Y-Axis 59.1 ips² 1500 mm/s²
Min. Engraving Depth 0.008 in. 0.2 mm
Max. Engraving Depth 0.12 in. 3 mm
Max. Resolution 500 dpi
Max. Engraving Material Thickness 1.2 in. 30 mm
Min. Line Width 0.02 in. 0.51 mm
Precision ±0.01 in. ±0.25 mm
Required Operating
Environment
Max. Humidity 70%
Temp. Range 40–95°F 5–35°C
Provided Operating Software LaserGRBL
Supported Operating Software LightBurn
Supported Image Formats .ai, .bmp, .dxf, .emf, .gif, .hpgl, .jpeg, .pdf, .plt, .png, .rd, .svg, .tiff ,
.tga, .wmf
Graphic Operating Modes Raster, Vector, Combined
Certifi cation CE, FDA
Net Weight 53.3 lb. 24.2 kg

4
1.5 Components

5
Main Parts
A. Cover—The cover provides access to the main bay for placing and retrieving materials, as well as fi xing the laser
path alignment and other maintenance. Power to the laser is automatically cut when the cover is opened.
B. Viewing Window—The polycarbonate window is shielded to protect you and others from the laser and its
refl ection, allowing monitoring of the engraving process. However, you should never stare continuously at the
laser during operation, even through the window.
C. Warnings—These notices supplement the Safety Information chapter of this manual. Read them carefully before
using the machine and contact our customer service or tech support teams if you have any questions or concerns.
D. Temperature Gauge—This gauge monitors the temperature of your laser tube’s cooling water in degrees Celsius
(±3°C). Do not allow the reading to exceed 38°C. If the temperature approaches this value, stop work and allow
your device to cool before further use.
E. Ammeter—This digital display shows the current being provided to the laser tube in mA. The knob to its right
is its master power control. It should be turned completely clockwise to enable the software to use the engraver's
full power range and can be used as master control for the laser’s power settings. When it is set to anything other
than 100%, it reduces the engraving software or control panel’s power settings by a proportionate amount.
F. Laser Key—This key controls the power supply to your laser tube and air assist.
G. Emergency Stop—Pushing this button cuts all power to the laser tube immediately in the event of an emergency.
Release it during startup to turn on your engraver's control system, exhaust fan, and water pump socket. Turn it
on before the laser key and turn it off after.
H. USB Port—This connects to your control computer and its engraving software.
I. Feet—These feet help anchor the machine in place.
J. Vents—These vents keep components from overheating during prolonged use and should not be obstructed.
K. Rear Access Door—This door opens to the laser bay, holding the laser tube and its connections.
L. Laser Tube—This long glass tube is fi lled with helium, nitrogen, and CO₂ gas and water cooled to safely produce
your engraving laser. Its connection to the laser power supply is extremely high voltage and extremely dangerous.
M. Water Sensor—This device provides the reading for the control panel's water temperature gauge.
N. 1st Mirror—This adjustable-angle mirror is fi xed in place to transfer the engraving laser from the tube to the
2nd mirror.
O. Power Socket—This socket connects to your main power supply. Be sure that the supply is stable and matches
the voltage on the label above the socket.
P. Ground Connection—This socket must be connected to a safe electrical ground if your location does not have a
well-grounded 3-prong outlet.
Q. Water Pump Socket—This socket connects to your water pump if needed. It is recommended, however, to use
a separate plug on a diff erent fuse for it.
R. Exhaust Fan—This fan pulls out gases and airborne debris from the worktable, sending it through your vent to
a window or air purifi er.
S. Water Tubes—The blue line brings cooling water from your pump or chiller to keep your laser tube cool and
stable and the other line returns it.

6
Main Bay
A. 2nd Mirror—This adjustable-angle mirror moves with the X-axis rail to allow the laser beam to travel along
the Y axis.
B. X-Axis Rail—The X-axis rail holds the 2nd mirror and supports the movement of the laser head left and right
across the workbed.
C. Laser Head—The laser head holds the 3rd mirror, the focus lens, the air assist outlet, and the red dot guidance.
D. Y-Axis Rail—The Y-axis rail supports the movement of the X-axis rail up and down the workbed.
E. Workbed—The removable workbed is equipped with a holding clamp to hold irregular-shaped objects in place
and a vented level board for regular-shaped products.
Laser Path
Laser Tube
Mirror 3
Mirror 1
Mirror 2
Focus Lens

7
Laser Head
A. X-Axis Rail—This rail moves along the Y axis, with its
movement controlled by limit switches.
B. 3rd Mirror—This adjustable-angle mirror transfers the laser
from the 2nd mirror to the focus lens.
C. Focus Lens—This 12 mm lens directs and focuses the laser
beam to its point of contact with the engraving material.
D. Manual Focusing Knob—This knob can be loosened to
allow the laser head to move up or down as needed for manual
focus adjustment. Retighten the knob before use.
E. Air Assist—This device blows pressurized air to kill sparks
and blow away gas and debris as you engrave.
F. Red Dot Pointer—This device helps you see the exact
position of the invisible engraving laser.
G. Laser—The engraving laser itself is invisible but highly
dangerous. Avoid any direct exposure to your skin or eyes.
Internal Wiring
A. Air Pump Power Supply—This device provides the electrical
power necessary for your air pump to work.
B. Laser Power Supply—This device transforms standard
electricity into the extremely high voltage charge necessary
for the laser tube.
C. Terminals—These terminal blocks hold your wiring in place
for easier part replacement when needed.
D. Air Pump—This device provides a consistent fl ow of
pressurized air to your laser engraver.
E. Motherboard—This circuit board controls the engraving
process, responding to commands from your engraving
software.

8
2. Safety Information
2.1 Disclaimer
Your engraver may diff er 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 device should come with safety precaution labels such as those seen below:
If any labels are missing, illegible, or become damaged, they must be replaced.
• Use this laser engraving device only in accordance with all applicable local and national laws and regulations.
• Use this device only in accordance with this instruction manual. Ensure that this manual is included with this
device if it is ever given or sold to a third party.
• DO NOT operate continuously for more than 2 hours. Stop for at least 30 minutes between uses.
• DO NOT leave this device unattended during operation. Observe the device throughout
operation. 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.
• DO NOT allow minors, untrained personnel, or personnel suff ering from a physical or mental impairment that
would aff ect their ability to follow this 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 fi re extinguisher, water hose, or other fl ame retardant system nearby in case of accidents. Ensure
that the local fi re department's phone number is clearly displayed nearby. In the case of a fi re, cut electrical power
before dousing the fl ame. Familiarize yourself with the correct range for your extinguisher before use. Take care
not to use the extinguisher too close to the fl ame, as its high pressure can produce blowback.

9
2.3 Laser Safety Instructions
When used as instructed, this machine comprises a Class 1 laser system safe for users and bystanders. However, the
invisible engraving laser, the laser tube, and its electrical components remain EXTREMELY dangerous. Used or
modifi ed without care, they can cause serious property damage and personal injury including but not limited to the
following:
As such,
• DO NOT modify or disassemble the laser and do not use the laser if it has been modifi ed or disassembled by
anyone except trained and skilled professionals. Do not modify or disable this device's provided safety features.
Dangerous radiation exposure and other injuries may result from the use of adjusted, modifi ed, or otherwise
incompatible equipment.
• NEVER leave any part of the machine open during operation. 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
with the naked eye. When risking exposure to the laser beam, take measures to protect yourself from potentially
refl ected laser beams, including the use of personal protective equipment such as protective eyewear specially
designed to fi lter the specifi c wavelength of your engraver's laser with an optical density (OD) of 5+.
• 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. Exercise caution with the red dot positioning light as well, as its direct
beam is a Class 2 laser in its own right.
• ONLY use this engraver if its automatic shutoff s are working properly. When you fi rst set up this engraver, and if
you subsequently notice any problems, test them (see below) before undertaking any other work. Do not continue
use if the shutoff s do not occur. Turn off the device and contact customer service or your repair service. Never
disable these shutoff s.
• DO NOT, under ANY circumstances, use this laser engraver if the water cooling system is not working correctly.
Always activate the water cooling system and visually confi rm that water is fl owing through the entire system
before turning on the laser tube. If using the provided water pump, ensure that it is placed in a tank full of cool
or tepid distilled water. Do not use ice water or allow the water to become hotter than 100°F (38°C). For best
results, keep it between 60–70°F (15–21°C). Replace heated water or add sealed bottles of frozen water to cool it
while never allowing the system to run without water or allowing the water to become colder than 50°F (10°C).
Immediately stop use if the water cooling system malfunctions.
• 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, fl ammable, explosive, or corrosive materials nearby where they could be
exposed to the direct or refl ected 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 specifi c materials.
• Ensure the area is kept free of other airborne pollutants, as these might pose a similar risk of refl ection, combustion,
etc.
• 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

10
2.4 Electrical Safety Instructions
• ONLY use this device with a compatible and stable power supply with less than 5% fl uctuation in its voltage.
• DO NOT connect other devices to the same fuse, as the laser system will require its full amperage. Do not use
standard extension cords or power strips. Use only surge protectors rated over 2000J.
• ONLY turn on the power to this device when it is well-grounded, either via a fi rm connection
to a 3-prong outlet or via a dedicated grounding cable fi rmly connected to the ground cable
connection on the machine’s rear. Do not use an ungrounded 3 to 2 prong adapter. The device's
grounding should be checked regularly for any damage to the line or loose connections.
• The area around this laser engraving device should be kept dry, well ventilated, and environmentally controlled
to keep the ambient temperature between 40–95°F (5–35°C). For best results, keep the temperature at 75°F (25°C)
or below. The ambient humidity should not exceed 70%.
• Do not handle the water pump (or the water in which it is submerged) while it is connected to its power supply.
Place it in water before connecting it to power and disconnect it from power before removing it.
• Adjustment, maintenance, and repair of the electrical components of this device must be made ONLY by trained
and skilled professionals to avoid fi res and other malfunctions, including potential radiation exposure from
damage to the laser components. Because specialized techniques are required to test the electrical components of
this marking system, it is recommended such testing only be done by the manufacturer, seller, or repair service.
• Unless otherwise specifi ed, ONLY undertake adjustment, maintenance, and repair of the 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 confi rming that processed materials 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),
tefl on, or other halogen-containing materials under any circumstances.
• DO NOT use high power settings at very low speeds when engraving highly fl ammable
materials. Instead, use more repetitions of your design at low power settings to achieve a similar
eff ect.
• Users of this laser engraver are responsible for ensuring that every person present during operation has suffi cient
PPE to avoid 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 ever use this laser engraver under any circumstances if the exhaust system is not working properly.
Always ensure that the exhaust system 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 and clean or repair
the system if the exhaust fan or vent pipe begins making more noise than usual or otherwise malfunctions.
ONLY use this engraver when its air assist is working properly.
• Users must exercise special caution when working with conductive materials as the buildup of their dust and
ambient particles may damage electrical components, cause short circuits, or produce other eff ects, including
refl ected laser radiation.

11
This machine can be safely used with the following materials:
Plastics
• Acrylonitrile Butadiene Styrene (ABS)
• Nylon (Polyamide, PA, etc.)
• Polyethylene (PE)
• High-Density Polyethylene (HDPE, PEHD, etc.)
• Biaxially-Oriented Polyethylene Terephthalate (BoPET, 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
Other
• Cardboard
• Ceramics, including Dishes, Tile, etc.
• Glass
• Leather
• Paper & Paperboard
• 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 §4.3 for the recommended parameters for the most commonly engraved materials.
This machine CANNOT be used with the following materials or with any materials which include them:
• Artifi cial 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 Polytetrafl uoroethylene (Tefl on, PTFE, etc.), due to its toxic fumes
• Iodine, due to its toxic fumes
• Metals, due to their conductivity and refl ectivity
• 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, refl ectivity, and
reaction(s) to high heat. Alternatively, contact our support department for further guidance.

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3. Installation
3.1 Installation Overview
A complete working system consists of the laser engraving machine, its integrated air assist and exhaust system, a
water tank (not included) with a pump (included), and a USB cable connected to a control computer with the enclosed
engraving software. Users can also confi gure other additional accessories (such as an industrial water chiller or
rotary axis) to suit their needs.
Please note the specifi c 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 40–95°F (5–35°C) and an ambient humidity
of under 70%. 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 the construction of a dedicated ventilation system.
It should be kept away from children, sensitive EMI devices, and combustible, fl ammable, explosive, or corrosive
materials. Remove any items that might block the side vents. 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
fuse. There should be fi refi ghting equipment nearby, and the local fi re department's phone number should be clearly
displayed.
It is highly recommended to have an extra work table nearby in order to avoid placing objects on or directly adjacent
to the machine, which could become a fi re or laser hazard.
3.3 Unpacking Your Engraver
Your engraver arrives in a box with its accessories (including this manual) packaged on top of your engraving device.
Check that you have received all of the following: a power cord, a ground wire, a USB cable, a USB fl ash drive with
engraving software included, a water pump and water piping, an exhaust pipe with a hose clamp, a tube of silicone
sealant, an acrylic focusing tool, a laser key, a ceramic testing resistor and its separate instructions, a roll of double-
sided tape, and this manual. Carefully remove any foam packaging material and nylon ties from the laser tube and
axes. You may keep the packaging in case of a future return but, if you do dispose of it or any accessories, be sure to
do so in compliance with applicable waste disposal regulations.
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.

13
3.4 Water Cooling Installation
The provided water pump is essential to your engraver's performance and longevity. When this laser works
without a properly maintained cooling system, its glass tube WILL explode from excess heat.
NEVER touch or adjust your engraver's water supply while the pump is connected to power.
To install your pump, fi ll a dedicated tank with distilled water. The tank should always hold at least 2 gallons (7.5 L) of
water. Using deionized or tap water will gradually degrade the quality of your engraver and may even cause dangerous
mineral buildup in the cooling system. NEVER use generic antifreeze for the same reason. Use custom laser-safe
formulations or use and store your engraver in a climate-controlled area.
Connect the blue hose that came preinstalled on your engraver directly to your pump and completely submerge the
pump in your water tank. Place the other tube into the tank in such a way that the returning water fl ows into the tank
without splashing or other problems.
Connect the water pump to its power supply. For best results, use a power outlet on a separate fuse from the engraver
itself. If no such outlet is available, the pump can also be plugged into a dedicated socket located on the back of the
engraver. Once the plug is plugged in, water should begin to run through your machine and back into your tank.
ALWAYS obtain visual confi rmation that the water is fl owing through the laser tube before starting your laser.
NEVER allow the water in the tank to become too hot to cool the laser. Heat damage can occur quickly and severely
shorten the life of the laser tube. Periodically check the water’s temperature on the built-in digital display. For best
results, keep it between 60–70°F (15–21°C). If the water begins to come near 100°F (38°C), replace it with cooler
water. Either replace it in stages or turn off the laser during this process: never allow the laser to operate without a
constant fl ow of cooling water. It is also possible to add sealed bottles of frozen water to your tank to keep the water
cool but never allow the water to become ice cold itself, as this could shatter the heated glass CO₂ tube as well.
As an alternative to manually adjusting the water in your tank, you may also use an industrial water chiller to supply
temperature-controlled water to your machine. We recommend the CW-3000 9L chiller (not included). If using it
with this engraver, follow its separate manual and plug it into an outlet on a separate fuse from the engraver itself.
Water Inlet
Water Outlet

14
3.5 Exhaust System Installation
Install the provided exhaust pipe onto the fan, as shown below. The pipe can be expanded to a full length of about 5
feet (1.5 m). The other end of the pipe should be connected to a dedicated purifi er or (if the fumes are not hazardous
and meet local and national air safety standards) placed out a window.
NEVER operate the machine in a closed room and NEVER operate the laser if the vents are not purifying or
removing the fumes produced by the target material. Research materials before use and never operate the laser on
any (such as PVC, tefl on, or other halogen-containing substances) that can produce corrosive, hazardous, or even
deadly fumes.
3.6 Electrical Grounding
This device employs a powerful laser. As discussed in the Safety Information above, it is extremely high voltage and
potentially dangerous, so users must securely ground it to avoid the buildup of static electricity. Using a standard
3-prong outlet will provide suffi cient grounding. If you do not have access to a 3-prong outlet, you MUST use the
grounding cable and ensure its proper connection. The far end of the cable should be securely connected to a single
metal rod driven at least 8 feet (2.5 m) deep or to two separate metal rods driven at least 4 feet (1.2 m) deep into soil
located at least 5 feet (1.5 m) from the machine. The resistance along the line should be no greater than 5Ω.
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.

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3.7 Main Power Connection
Confi rm that the labeling beside the connection socket on the machine matches your power supply. Connect one end
of the main cable to the connection socket and the other end to a grounded outlet. Under NO circumstances should
you switch on the device if the voltages do not correspond.
Fluctuation along the line should be less than 5%. If this is exceeded, the fuses will blow. They are located in the
connection socket and are accessible from the exterior. Similarly, do not connect this device to standard extension
cords or power strips. Connect it directly to a grounded outlet or use a surge protector rated over 2000J.
3.8 Air Assist Inspection
Your air assist should arrive preinstalled and correctly wired. Confi rm that pressurized air begins to blow from the
laser head when the engraver is connected to power, its emergency stop released, and its laser key 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.
3.9 Control Computer Setup
The control computer should be connected using the provided USB cable via the port marked “USB Cable to PC”. If
you choose to use a longer cable, do not use one longer than 15 feet (4.5 m) to avoid possible interference on the line.
Access the USB fl ash drive provided with your engraverʼs accessories pack. Extract and install the version of the
CH341 driver that matches your control computerʼs operating system.
Extract and install LaserGRBL from the same fl ash drive or download the newest edition from its offi cial website
lasergrbl.com. Alternatively, this engraver is compatible with most 3rd party engraving software, including
LightBurn.

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Once the driver is installed, choose the COM port and set the baud rate to 115200. Next, click “Connect”.
After your engraver has successfully connected, click on “Grbl” and select “Grbl Confi guration”.
In the confi guration menu, change Step Direction Invert (Item #3) from 1 to 3 and Homing Direction Invert (Item
#23) from 3 to 1.
LaserGRBL Confi guration
Open the LaserGRBL software on your computer. Select “Tools” from the toolbar at the top and then the “Install
CH340 Driver” option.

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Click “Write” to save the changes youʼve made and then close the menu.
To enable the move menu, type the command $X into the GCode fi eld and press Enter.
The software should now work with your engraver. Familiarize yourself with the software’s image design features
and laser control settings before using it to operate your device.