OMTech UK USB350n Cabinet Laser Engraver User Manual

USB350n
Cabinet Laser Engraver
User Manual

Read Carefully Before Use
Keep for Future Reference

PREFACE

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. It is intended to be used in conjunction with your engraving software manual, as the  software typically does not only provide image design but also serves as an alternative interface for 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.

Introduction

1.1 General Information
This manual is the designated user guide for the installation, setup, safe operation, and maintenance of your cabinet 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 excited carbon dioxide (CO₂), refl ecting that beam off three mirrors and through a focus lens, and using this focused light to etch designs into certain substrates. The first  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. Because they move during operation, they also require periodic readjustment using their attached positioning screws to maintain the proper laser path. 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 hours before requiring replacement. However, constantly running your laser above 70% of its maximum rated power can signifi cantly shorten its service life. It is recommended to use settings from 10–70% of the maximum rated power 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. This device should never be used 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 operating properly. 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.

1.2 Symbol Guide
The following symbols are used on this machine’s labelling 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.
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 rubbish.

1.3 Designated Use
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 and the material being engraved including its refl ectivity, 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 cabinet laser engraver only  in accordance with its designated use, the other instructions in its manuals, and all applicable local and national laws and regulations.

1.4 Technical Specifi cations

Expected Service Life ‘
at <40% / 40-70% / >70% Power| .
2000/1500/1000 hr.
Laser Wavelength| 10640 nm
Processing Area| 500×300 mm I| 19.7×11.8 in.
Workbed Blades| 13
Max. Processing Speed| 600 minis| 23.6 ips
| X-Axis| 8000 minii2| 315 ips2
Max. Acceleration| Y-Axis| 2000 mm/?| 78.8 ips2
Min. Engraving Depth| 0.01 mm| 0.0004 in.
Max. Engraving Depth| 10 mm| 0.4 in.
Min. Letter Size| lit mm.:| 0.040.04 in.•
Required Operating Environment| Max. limnWay| 70%
Temp. Range| 5-35°C •| 140-9’5°F
Provided Operating Software| RDWorks
Supported Operating Software| CorelLaser, LightBUrn
Supported Image Formats| .ai, .bmp, .dxf, .gif, .hpgl, jpeg, .pdf, .plt, .png, .rd, .svg, .tiff, .tga
Graphic Operating Modes| Raster, Vector, Combined
Certification| CE, FDA
Net Weight| 75 kg| 1 165 lb.

1.5 Components

Main Parts
A. Cover—The cover provides access to the main bay for placing and retrieving materials, as well as fixing 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 reflection, allowing monitoring of the engraving process. However, you should never stare continuously at the laser during operation, even through the window.
C. Y-Axis Rail—The Y-axis rail supports the movement of the X-axis rail up and down the workbed.
D. Laser Head—The laser head holds the 3rd mirror, the focus lens, the red dot guidance, and the air assist outlet.
E. X-Axis Rail—The X-axis rail holds the 2nd mirror and LED lighting. It also supports the movement of the laser head left and right across the workbed.
F. Workbed—The workbed can be adjusted in height to fit thinner and thicker materials, as well as adjusted between the aluminium and honeycomb platforms.
G. Workbed Adjustment Knob—This knob allows manual raising and lowering of the workbed along the Z-axis.
H. Control Panel—The control panel off ers hands-on control of the engraving process, including manual movement of the laser head and fi ring of the laser.
I. Reset Button—Press this button after the emergency is over to restore power to your machine. You also need to press this button if the laser is turned off by the interlocks when the cover or one of the doors is opened during engraving.
J. Laser Key—This key controls the power supply to your laser tube.
K. Indicator Light—This light indicates the laser status. When the laser tube is receiving current during normal operation, the light shows a green color. In standby mode, it switches to yellow, and in case of a fault, it turns red.
L. Emergency Stop—This button immediately cuts all power to the laser tube in the event of an emergency.
M. Warnings—These notices supplement the Safety Information chapter of this manual. Read it carefully before using the machine.
N. Front Access Door—This door provides access to the area below the workbed for easy cleanup. This is also where the accessories pack is located when the engraver first arrives.
O. Inputs—This panel includes the ports for its USB, computer, and internet connections.
P. Main Power Switch—This switch controls the main power supply to the machine.
Q. Right Access Door—This door provides access to the mainboard, motor drivers, and power supplies.
R. Power Sockets—These sockets connect to your main power supply, ground the machine, and provide an additional socket for your water pump if needed. It is recommended, however, to use a separate plug on a different fuse for your water cooling system.
S. Top Rear Access Door—This door opens to the laser bay, holding the laser tube and its connections.
T. Laser Tube—This long glass tube is filled 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.
U. Lower Left Rear Access Door—This door provides access to the same area as Door N above.
V. Lower Rear Access Door—This door provides access to the air pump for easier maintenance.
W. Exhaust Fan—This fan pulls out gases and airborne debris from the worktable, sending it through your vent to a window or air purifier.
X. Water Ports—These ports connect to your water pump or chiller to keep your laser tube cool and stable.
Y. Air Intake—This port connects to your air assist to provide its pressurised air. Periodically check its filter to keep it clear of any obstruction.

Laser Path
A. Laser Tube—This CO₂-fi lled glass tube is mounted on brackets and immobile. Its connection to the laser power supply is extremely high voltage and extremely dangerous.
B. 1st Mirror—This adjustable-angle mirror is fi xed in place to transfer the engraving laser from the tube to the 2nd mirror.
C. 2nd Mirror—This adjustable-angle mirror moves with the X-axis rail to allow the laser beam to travel along the Y axis.
D. 3rd Mirror—This adjustable-angle mirror moves with the laser head to allow the laser beam to travel along the X axis.
E. Focus Lens—This lens directs and focuses the laser to the material.
F. Workbed—The bare workbed can be adjusted in height or fi tted with aluminium or honeycomb tables for diff erent projects.

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. Red Dot Pointer—This device helps you see the exact position of the invisible engraving laser.
D. Focus Lens—This 18mm lens directs and focuses the laser beam to its point of contact with the engraving material.
E. Air Assist—This device blows pressurised air to kill sparks and blow away gas and debris as you engrave.
F. Laser—The engraving laser itself is invisible but highly dangerous. Avoid any direct exposure to your skin or eyes.
G. Workbed—Use the provided acrylic tool to get the perfect focus for any thickness of material.

Power and Inputs
A. USB Port—This port allows you to load and save designs and parameters directly onto the engraver.
B. USB Line Port—This port connects to your control computer and its engraving software using any of its USB ports.
C. Ethernet Port—This port connects to your control computer and its software either directly or via the internet.
D. Main Power Switch—This switch turns on the power supply to your control panel, laser, and water pump.
Right Access Door
A. Safety Relay—This device shuts off the laser’s power when either the cover or the front access door is opened during use or when the emergency shutoff button is pressed.
B. X-Axis Driver—This device moves the laser head along the X rail.
C. Y-Axis Driver—This device moves the X rail along the Y rail.
D. Mainboard—This circuit board controls the engraving process, responding to commands from your engraving software or the machine’s control panel.
E. Alternating Current Contactor—This device forms a safety dual circuit with the safety relay by making and breaking electrical connections between the laser and the laser power supply.
F. Laser Power Supply—This device transforms standard electricity into the extremely high voltage charge necessary for the laser tube.
G. Safety Power Supply—This device powers the machine’s safety relay, indicator lights, and alternating current contactors.
H. Control Power Supply—This device powers the machine’s control panel.

Laser Power Supply
A. High-Voltage Wire—This line is connected to the laser tube’s anode or positive end, providing high-voltage current to power the laser.
B. Mounting Holes—These standard slots allow simple installation and removal.
C. Digital Display—This display provides the real-time current to the laser tube in milliamps and notifi cation of any problems with the laser or water systems.
D. Laser Indicator Light—This light shows when current is being sent to the laser tube.
E. Main Power Terminal—This terminal block holds the power supply’s connection to the engraver’s grounding (FG) and to the main power supply (AC).
F. Test Button—This button is used to attempt to test fi re the laser when trouble-shooting problems. If the laser fi res successfully, the problem will usually be with the control panel or its connections.
G. Connection Terminal—This terminal block holds the connections to the high (H) and low level output (L), the water protection switch (P), another ground (G), and two laser signal controls (IN & 5V).
H. Water Indicator Light—When connected, this light shows the water cooling system is operating.
I. Laser Signal Indicator Light—This light shows the laser tube is operating.
J. Ethernet Port—This port allows you to connect the laser power supply to an external ammeter.

Control Console

Console Screen

A. Graphic Display Area: Shows the whole fi le’s track and the running track.
B. Version Number: Displays the version numbers of the panel and motherboard.
C. System Time: Displays the current system time.
D. Parameter Display Area: Displays the running fi le’s fi le number, speed, max power, etc.
E. Coordinate Display Area: Displays the current coordinates of the laser head.
F. Layer Display Area: Displays the layer parameters of current or previewed fi les. Parameters from left to right
are layer number, colour, speed, and maximum power.
G. Frame Size of Processing: Displays the dimensions of the current fi le.
H. Number of Pieces: Shows the count of completed runs of the current fi le.
I. System Status: Displays the current status of the machine: Idle, Running, Paused, or Finished. The processing time is shown on the right side.
J. Processing Progress Bar: Displays the progress of the current fi le.
When the system is idle or the work is finished, all the buttons are used. Users can process the file, set the parameters, preview their fi le, etc. When the work is running or paused, some buttons will not work (e.g., Origin and Frame).

Safety Information

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.
• 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 operate continuously for more than 3½ hours. Stop for at least 30 minutes between uses.
• 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 (including by means of the emergency stop switch) after each use.
• DO NOT allow minors, untrained personnel, or personnel suff ering from physical or mental impairment that would aff ect 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 fi re extinguisher, water hose, or other fl ame retardant system nearby in case of accidents. Ensure that the local fi re brigade’s phone number is clearly displayed nearby. In the case of a fi re, cut electrical power before dousing the fl ame.  Familiarise 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.

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 connections 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:

• 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. 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. Dangerous radiation exposure and  other injury may result from the use of adjusted, modifi ed, or otherwise incompatible equipment.

• NEVER leave any part of the cabinet 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.
  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 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 shutoff s do not  occur. Turn off the device and contact customer service or your repair service. Never disable these shutoff s.

• DO NOT ever under ANY circumstances use this laser engraver if the water cooling system is not working properly. 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 water that has become hotter than 38°C (100°F). For best results, keep it between 15–21°C (60–70°F). 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 10°C (50°F).
  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, flammable, 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.

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 with 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 socket or via a dedicated grounding cable firmly connected to the proper slot on the cabinet. 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.
• The area around this laser engraving device should be kept dry, well ventilated, and environmentally controlled to keep the ambient temperature between 5–35°C (40–95°F). For best results, keep the temperature at 25°C (75°F) or below. The ambient  humidity should not exceed 70%.
• Do not handle the water pump or the water in which it is submerged while the pump is attached 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 done ONLY by trained and skilled professionals to avoid fi res and other malfunctions, including potential radiation exposure from damage to the laser components.  Because specialised 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 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 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), tefl on, or other halogen containing materials under any circumstances.

• Users of this laser engraver are responsible for ensuring that every person present during operation has suffi cient 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 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. Periodically  check the air assist intake fi lter to ensure it stays free of any dust or debris.

• 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 eff ects including refl ected laser radiation.

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 uoroethylenes (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, reflectivity, and reaction(s) to high heat.  Alternatively, contact our support department for further guidance.

Installation

3.1 Installation Overview
A complete working system consists of the laser engraving cabinet, its vent, a water tank (not included) with a pump (included), all applicable connection cables, and the laser and access keys. The cabinet can use designs provided by the enclosed engraving  software by direct or internet connection with your computer; it can also engrave designs loaded directly from a flash drive. Users can configure other additional accessories (such as an industrial water chiller, fume extractor, or rotary axis) 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 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 5–35°C (40–95°F) and an ambient humidity 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 construction of a dedicated ventilation system. It should be away from children; combustible, fl ammable, 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 socket. No other item should be drawing current from the same fuse. There should be fi refi ghting equipment nearby and the local fi re brigade’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 engraving machine arrives in a wooden crate with its accessories (including this manual) packaged inside the area behind the front access door. You should have placed the crate in a spacious fl at area for unpacking, ideally where you plan to operate the  machine permanently. If you have not already done so, fi nish removing the crate from around your engraver.
Step 1. Move the engraver slowly and carefully into place with two or more people.
Step 2. Retrieve the access keys from the main bay in the front of the machine. Use them to unlock the front access door below the workbed and take out the accessories pack. Check that you have received all of the following: a power cord, a ground wire, USB and Ethernet cables, a USB fl ash drive with engraving software included, a water pump and water piping, an exhaust pipe with a hose clamp, a set of Allen keys, a tube of silicone sealant, an acrylic focusing tool, keys, and this manual.
Step 3. CAREFULLY remove the rest of the foam packaging material from around the laser tube, the viewing window, and the rest of the machine. The laser tube is a highly fragile object and should be handled delicately and as little as possible.

Step 4. Inside the main bay, remove the nylon cable ties from the X axis and the honeycomb table.

Step 5. 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 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 socket will provide sufficient grounding. If you do not have access to a 3-prong socket, 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 2.5 metres (8 ft.) deep or to two  separate metal rods driven at least 1.2 metres (4 ft.) deep into soil located at least 1.5 metres (5 ft.) 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.

3.5 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 at least 7.5 litres (1.6 gal.) of distilled water. Using deionised 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 store your engraver in a climate-controlled area.
Connect the two hoses that came with your engraver to the water inlet and water outlet on the back of your engraver. Attach the other end of the inlet tube directly to your pump and completely submerge the pump in your water tank. Place the outlet 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 socket on a separate fuse from the engraver itself. If no such socket is available, the pump can also be plugged into a dedicated socket located on the side of the engraving cabinet. Once the  pump 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. Install a thermal alarm or periodically check the water’s temperature during prolonged use. If the water begins to reach 38°C (100°F), 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. Follow its separate manual and again, for best results, plug it into a separate fuse from the  engraver itself. Remember to connect the chiller’s outlet port with the engraver’s inlet port and to connect the chiller’s inlet with the engraver’s outlet.

3.6 Exhaust System
Install the provided exhaust pipe directly onto the fan. The pipe can be expanded to a full length of about 1.5 metres (5 feet).

The other end should be connected to a dedicated purifier or (if the fumes are not hazardous and meet local and national air safety standards) placed out a window. NEVER operate the laser if the vent is 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, and other halogen- containing substances) that can produce corrosive, hazardous, or even deadly fumes.

3.7 Main Power Connection
Confirm that the labelling 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 wall socket. 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 socket or use a surge protector rated over 2000J.
3.8 Control Computer
See the software manual for details on the requirements for the control computer. The control computer can be connected using the provided USB cable (via the port marked “USB Cable to PC”), using the provided Ethernet cable (“Ethernet Cable”), or using the  internet if the engraver has been connected to it using the Ethernet cable. If the control computer is directly connected to the engraver, it should not be placed more than 4.5 metres (15 ft.) away in order to avoid possible interference to the signal on its line.  Familiarise yourself with the software’s image design features and laser control settings before using it to operate the laser.

3.9 Initial Testing
Emergency Shutoff
Because of the risk of fi re and other hazards during engraving, this engraver includes a large and easy-to-reach emergency stop button near the control panel. Press it down to stop the laser tube instantly.

When your engraver arrives, its e-stop is already pressed. Release the e-stop and press the reset button to allow the laser to function. You should test that it works properly before conducting ANY other work with your machine.
Start the water cooling system, place a piece of laserable scrap material on the workbed, close the cover, and press PULSE to fi re the laser. Hit the emergency stop button and observe whether the laser stops instantly. If the laser continues to fi re, the emergency  stop is not working and must be replaced before the engraver can be used. Turn off the machine and contact customer service.

Automatic Shutoff (Interlocks)
Because of the risk of blindness, burns, and other injury from direct exposure to the invisible engraving beam, this device also shuts off the laser automatically when either the protective cover or the front access door is opened.

After ensuring that the emergency stop button works, you should also test that these shutoff s work properly before conducting any other work on your machine. Start the water cooling system, place a piece of laserable scrap material on the workbed, close the  cover, and press PULSE to fi re the laser. Release the button. Taking care not to expose yourself to seeing or being hit by any possible refl ected laser light, open the cover as little as possible and attempt to fi re the laser again. If the laser fi res, the automatic  shutoff is not working and must be repaired before the engraver can be used. Turn off the machine and contact customer service. Repeat this process with the other interlocks, using the reset button to restore power after each has been activated.

Water Shutoff
Because of the danger posed by an uncooled laser tube, this engraver also shuts off the laser automatically when the water cooling system malfunctions.
After ensuring that the emergency stop button and cover protection both work, you should also test that the water shutoff works properly before conducting any other work on your machine. Start the water cooling system, place a piece of laserable scrap material  on the workbed, close the cover, and press PULSE to fi re the laser. Release the button. Cut off the fl ow of water by crimping or tying the two hoses. (Take care not to damage the hoses themselves in this procedure.) Attempt to fi re the laser again. If the laser fi  res, the automatic shutoff is not working and must be repaired before the engraver can be used. Turn off the machine and contact customer service. If the laser does not fi re, the automatic shutoff is working fi ne; simply release the two hoses to begin circulating  water again and continue setting up your engraver.
Laser Path Calibration
Although our factory calibrates your entire system during assembly, it is possible for the laser tube, the focus lens, and/or one or more of the mirrors to be jostled out of alignment during shipment. As such, it is recommended that you perform an optical  alignment test as part of setting up your machine. See the Maintenance section below for step-by-step guidance.
Air Assist
Your air assist should arrive preinstalled and correctly wired. Simply check that it is correctly configured and connected as shown. If any tubing or wiring needs to be reconnected, shut off all power to the machine (including by pressing the emergency stop)  before adjusting anything. Check that its air intake fi lter is in place, clean, and not obstructed by any nearby objects.

3.10 Security
For your own safety and that of passersby, this engraver can be locked shut using the provided key. It is recommended that you use it to lock the machine between sessions, preventing any unauthorised operation of the machine.

Operation

4.1 Operation Overview
Operate this laser marking machine 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 programme, saving or converting the fi le to a format compatible with the engraver. See the full list of acceptable fi le types in the  Technical Specifi cations section above.
Step 2. Check that your water tank is full of clean and cool but not cold distilled water. Replace the water if it is not clean or cool. Add more water if it is not completely covering the water pump. Turn on the water pump by plugging it in or (if it’s plugged into the  cabinet directly) by turning the main power switch on the side of the machine to its ON position. Visually confi rm that the water is fl owing through the whole system either by opening the top rear door to look at the laser tube itself or by observing that water is entering the machine and returning to the tank through the outlet tube. If the laser tube is examined directly, remember to close its access door before continuing. Add more distilled water if the pump is no longer well covered after fi lling the engraver’s water  tubing.
Step 3. Turn on your fume extractor or ventilation system, if any. (The engraver’s own exhaust fan will turn on with the machine.)
Step 4. If you have not already done so, turn on the control panel by turning the main power switch on the side of the machine to its ON position. Load your chosen design directly from a USB fl ash disk or through your computer’s connection with the engraver.
Step 5. Open the engraver’s cover, check that the air assist is working properly, and adjust the workbed if necessary.
The honeycomb bed is recommended for most applications. The bed can be raised or lowered using the control panel or the manual adjustment knob to accommodate diff erent thicknesses of various materials.
Alternatively, the honeycomb bed can be removed to expose the aluminium knife bed and provide a little more space for thicker projects. For heavier substrates, be careful to distribute the weight as evenly as possible across the reinforced aluminium supports.
Step 6. Place a sample piece of your material on the workbed. The standard location is in the top left corner of the workbed. This can be changed by moving either your design or the location of the engraver’s origin using either the control panel or your engraving software.
Step 7. Focus the laser by placing the acrylic focus tool on top of the material and carefully raising the workbed.
The laser head should barely touch the top of the acrylic tool without applying any pressure, ensuring the engraving distance is correct. (Again, never attempt to focus the laser either way without some material on the workbed.) Close the cover.
Step 8. Customise your design’s contrast and engraving depth by adjusting the parameters in your engraving software or directly through the control panel. If your engraving instructions detail the power setting in milliamperes, use the following conversion chart  to fi nd the appropriate power setting:

The threshold for the lowest setting is 10%. The laser will not fi re at any setting lower than this. It is NOT recommended to use the laser tube at full capacity, especially for extended periods. The recommended maximum power setting is 70%, as prolonged use  above that amount will shorten your laser’s service life.
To increase engraving depth, increase the amount of energy per unit area by increasing the laser’s power or the number of loops or by slowing down the speed parameter. Engraving too deep, however, reduces image quality, especially for coated materials.
When working with new materials, remember that you should always start on the low end of likely settings. If the eff ect is not yet strong enough, you can always rerun the design loop several times or rerun it with more powerful settings until you create the eff  ect that you want.
Resolution should usually be set to 500 dots per inch. Reducing your image resolution can be helpful in some cases, reducing fl aming and increasing the energy of the pulse in a way that improves the quality of the resultant image in some materials such as some plastics.
Step 9. Release the emergency stop button, press the reset button, and insert and turn your laser key to turn on the laser tube. To reduce the risk of electric shock, once the laser tube is on, try to touch the engraver with only one hand at a time.
Step 10. Press START to engrave your design. Again, do not stare continuously at the laser even through the protective polycarbonate window. Watch for possible issues like sparks or fi res, however, and be prepared to quickly extinguish a fi re if necessary.
Step 11. Once the laser has stopped, examine the quality of your fi rst run and adjust the laser parameters on the control panel or in your software as necessary to create the desired eff ect. During repetitive engraving and cutting, periodically check your pump’s  tank to maintain a water temperature below 38°C (100°F). If this temperature is reached, stop work and allow your engraver to cool before further use.
If any interlock activates as you work, press the reset button to restore power to the laser.
Step 12. When you have finished engraving, close your engraving software and then turn off your machine in the following order: laser key, emergency stop button, main power switch, and any ventilation or water cooling system. Fully clean the workbed,  emptying any debris from the lower bay.

4.3 Instructions for Specifi c Materials
The following instructions are suggestions to help speed safe work with a range of materials. The user should research the specifi c safety and engraving requirements of their specifi c material to avoid the risk of fi re, hazardous dust, corrosive and poisonous  fumes, and other potential problems. Once the product is known to be safe or appropriate protective equipment has been set up, it can be helpful to engrave a test matrix of small boxes produced at various speed and power settings to discover the ideal settings  for your design. Alternatively, start with low power and fast speed settings and rerun your design as many times as needed, using progressively greater laser intensity.

Average Engraving Settings

.
Description| .
Acrylic| Glass| ‘ Leather| .
Tile/Stone| .
Wood
---|---|---|---|---|---
Natural| Artificial
50W| Speed| 275 muds| 175.mmis ..| 350 =Vs| 375 mm/s| 125 =Vs| 150, minis
Power| 22%| 19%| 19%| 18%| 20%| 21%

Ceramics
When engraving on ceramics, generally use moderate to high power. Using more loops rather than higher power and lower speed can help avoid cracking the material during work. Be mindful of the health risk posed by dust generated from ceramic engraving,  especially for repetitive industrial applications. Depending on the material and the amount of work, a fan or even full ventilation system may be required to address the problem. Similarly, operators and others in the work area may need to use breathing PPE such as masks and respirators.
Glass
When engraving glass, generally use high power and low speed. As with ceramics, it can be helpful to run more loops at lower settings to avoid cracks. Care must be taken when engraving fi breglass and carbon fi bre to avoid combinations of settings that produce  a laser intensity great enough to damage the structural integrity of its component fi bres, producing blurry marking. PPE should be worn to avoid exposure of the eyes, nose, mouth, and skin to the dust produced by working with either material,  especially for repetitive industrial applications. Clothing worn while working with fi breglass should be washed separately afterwards.
Leather
When engraving leather products, generally use low to moderate power at high speed. Natural leather should be engraved slightly slower and at slightly higher power than artifi cial leather. Be especially attentive to the possibility of fi re, as well as the dust  produced in repetitive applications.

Metal
CO₂ laser engravers should not be used for marking, engraving, or cutting metal. They are best suited for working coatings applied to a metal base, and care must be taken not to attempt work on the underlying metal itself. A variety of coatings specialised for  CO₂ engraving are available, and the user should follow the instructions provided as the parameters vary from product to product and metal to metal. Generally, work on aluminium coatings should be done more quickly at lower power and work on steel coatings  can be done more slowly at higher power.
Paper and Cardboard
When engraving various paper products, generally use low to moderate power and fast speed. Test samples from each batch, as only small parameter diff erences can separate eff ects that are too light from those that burn through the substrate. As with leather,  be especially attentive of the possibility of fire, as well as the dust produced in repetitive applications.
Plastics
Plastics for engraving are available in many diff erent colours and thicknesses and with many different coatings and surfaces. The majority of available plastics can be well engraved and cut with the laser. Plastics with a microporous surface seem to give the best  result, because less surface material needs to be removed. When engraving plastics, generally use low power and high speed settings. Marking and engraving with too much power or at too low a speed can concentrate too much energy at the point of contact,  causing the plastic to melt. Among other problems, this may produce poor engraving quality, noxious fumes, and even fi res. High resolution engraving can cause the same problem, so medium to low resolution designs should be preferred for most plastics.

Rubber
The various compositions and densities of rubber cause slightly varying engraving depth. Testing various settings on sample pieces of your specifi c rubber is highly recommended for best results. When engraving rubber, generally use a consistent high power  setting and create your eff ects by varying the laser’s speed. Microporous rubber materials require a signifi cantly higher speed than standard rubber. Engraving any kind of rubber produces a considerable amount of dust and gas. Depending on the amount of work, breathing PPE and/or a full ventilation system may be required to address the problem.
Stone
When engraving various kinds of stone, generally use moderate power and moderate to fast speed. As with ceramics and glass, be mindful of the dust created (especially for repetitive industrial applications) and take similar measures to ensure the safety of users  and others in the work area.
Textiles
When engraving textiles like cloth and fl eece, generally use low power and fast speed. As with leather, be especially attentive to the possibility of fi re and dust.
Wood
As with rubber, there is a huge variety of woods and testing your specifi c material is essential to get the best results.
In general, wood with consistent grain and colouring engraves more evenly. Knotted wood produces uneven effects, while resinous wood produces greater edge contrast. Some soft woods like balsa, cork, and pine engrave well (albeit with low contrast) at low or  moderate power settings and high speed. Others like fi r suff er from uneven fi bres that usually produce a poor eff ect no matter what you do. Hard woods like cherry and oak engrave well at high power settings and low speed. Manufactured wood products can  vary from brand to brand, mostly based on its glue composition and abundance. MDF works well but creates dark edges when cut.
In addition to the risk of fi re with any wood product, extra care must be taken with the fumes from the glue used in plywood and other manufactured woods. Some are too dangerous to work with at all, while others require careful ventilation and the use of  breathing PPE for repetitive industrial applications. Wood toxicity should also be examined, as the dust from some natural woods including oleander and yew can also cause nausea and cardiac problems in high enough amounts.

4.4 Control Console Instructions
4.4.1 Overview
You can control your engraver directly from the built-in control panel, through a direct connection with your computer, or over the internet. For details on operating your engraving software, see its separate manual. The built-in control panel can operate the  laser manually or engrave designs loaded onto fl ash drives and external hard drives connected to the USB port on the right side of the cabinet.

For manual operation, the arrow keys can be used to move the laser head along the X and Y-axis guide rails and the PULSE button can be used to fi re the laser. The laser head can be set to tab over a set distance each time the arrow buttons are pressed by hitting  MENU and adjusting the parameters under “Manual Set+.” The laser can be set to fi re for a fi xed period by pressing MENU and adjusting the parameters under “Laser Set+.” All of the buttons and menus should be labelled in English. If they are not, press  MENU and go to the top button in the right column to change the console’s language settings.
To load a design from a FAT16 or FAT32 formatted fl ash disk or external hard drive, press MENU, select “File”, then “Udisk+” and then “Copy to Memory”. Select the design in the File menu and then select “Run”. Various parameters can be adjusted using the  console’s menus and submenus, including setting multiple origin points to engrave the design on your material four times in a single session.

When running a design from the control console, this will be the main display. The design should appear in the top left corner and its name and the current speed and power settings on the top right. The position of the laser head relative to the workbed appears  as the X (horizontal) and Y (vertical) coordinates. The Z coordinate shows the elevation of the workbed itself although it can only be automatically adjusted if a motorised lift is installed. The U coordinate can be confi gured to control rotary axes or an automatic  feed if either is installed. Below them are the layers with notes about their separate speeds in mm/s and their maximum power as a % of your machine’s rated power. The batch count on the lower left keeps track of the number of times the current design has  been engraved in a single session. Like the button says, press START/PAUSE to start engraving your loaded pattern and to pause engraving when needed.

If there is ever an emergency situation such as a fire, do not use the control panel to pause or stop the engraving. Hit the emergency stop button immediately.

4.4.2 Setting the Laser Power
When you press ENT in the main interface, the cursor box will initially select the “Speed” parameter, as shown in the fi gure below:

Push the ▲ and ▼ keys to change between the parameters. Select the “Power” parameter, as shown below:

Press ENT while the red cursor is on “Power” and the following interface pops up:

Push the ▲ and ▼ keys to change the parameter value. Press ENT to save the change. Press ESC to invalidate the change and return to the main interface.

4.4.3 Setting the Laser Speed
When you press ENT in the main interface, the cursor box will initially select the “Speed” parameter, as shown in the fi gure below:

Press ENT key again and the following interface pops up.

Push the ▲ and ▼ keys to change the parameter value. Press ENT to save the change. Press ESC to invalidate the change and return to the main interface.

4.4.4 Function Menu
Press MENU on the main interface to enter the Menu interface:

Push the ▲ and ▼ keys to select items, and then press ENT to enter the corresponding submenu.

4.4.5 Adjusting the Z Axis
When Z Move is selected, push ◄ or ► to control the movement of the Z axis when a motorised workbed (sold separately) is installed.
4.4.6 Adjusting the U Axis
When U Move is selected, push ◄ or ► to control the movement of the U axis. This can be used to control the rotational position of a rotary axis or the linear position of an automatic feed (both sold separately) if either is installed.

4.4.7 Resetting the Axes
When Axis Reset+ is selected, push ENT and the display will show:

Push ▲ or ▼ to select an item. Press ENT to start the resetting of the selected axis, and the message “Resetting Is Underway” will show on the screen. Upon completion, the message will automatically disappear and the system will return to the main interface.

4.4.8 Adjusting the Laser Movement Mode
When Manual Set is selected, press ENT and the following will be displayed:

When the Move Mode is “continuous”, the Manual jog parameter has no eff ect. When used to manually move the laser head, the direction keys move it continuously until released. When the Move Mode is “jog”, each time the direction key is pressed the laser  head will move precisely the distance saved in this parameter. Adjust it up or down with the direction and ENT keys. When you fi nish your adjustments, save them by selecting Write with the ENT key or hit ESC to leave without saving your changes. Read can  load saved parameters.

4.4.9 Adjusting the Laser Settings
When Laser Set is selected, press ENT and the display will show:

The operation method is the same as the previous setting. When Continue is selected, press PULSE to fi re the laser, and release the key to fi nish fi ring. When you fi nish your adjustments, save them by selecting Write with the ENT key or hit ESC to leave  without saving your changes. Read can load saved parameters.

4.4.10 Setting the Origin Points
When Origin Set is selected, press ENT and the following dialogue box will pop up:

Press FN to select an item. When Multi-Origin Enable is selected, press ENT to enable or disable the item. When enabled, the small box will be red and, when disabled, the small box will be grey. When selecting Set Origin or Next Origin, push ◄ or ► to select  the value. When changing the parameters of Set Origin, remember to press ENT to validate the change. Parameters will be saved automatically when the interface is closed.

Details of each item are shown below:

• Multiple Origins Enable: Yes or No can be selected. If you select No, the system will use single-origin settings. You can press ORIGIN and set the origin. If you select Yes, the system will use multiple-origin settings and ORIGIN on the keyboard becomes  invalid. In this case, the parameter of each origin must be set in the menu as follows.
• Set Origin 1/2/3/4: After the multiple-origin setting is enabled, put the cursor on Set as Origin 1/2/3/4. Press ENTER on the keyboard and the system will take the coordinates as the corresponding ones of the origin 1/2/3/4.
• Origin Enable 1/2/3/4: After the multiple-origin setting is enabled, the four origins can also be individually disabled and enabled.
  Once multiple-origin logic is selected, if the number of the next origin is 1 and four origins are enabled, when the memory file function is started (via the keyboard or PC) or the processing file is uploaded into the PC and this file selects “Take the Original  Origin as the Origin”, the work will use diff erent origins each time it starts. The rotation order of origins is 1→2→3→4→1→2… If the processing file is uploaded to the PC and this fi le selects “Take the Current Origin as the Origin”, the system will always  use the current origin.

4.4.11 Setting Default Parameters
When Set Fact. Para. is selected, the current parameters of the machine will be stored as its defaults. They can then be retrieved by using the Restore Default Parameters command. It is recommended that you save your machine’s actual factory default settings,  so they can be easily restored when need be.
If a password is enabled, push ◄ or ► and ▲ or ▼ to select a password and press ENT to save it.

4.4.12 Restoring Default Parameters
When Def. Fact. Para. is selected, the system will replace all current parameters with the saved default factory parameters. The operation method is the same as setting the default parameters.

4.4.13 Setting the Interface Language
When Language is selected, press ENT and the display will show:

The operation method is the same as those described above. Press ENT when the desired language is selected and then return to the main interface.

4.4.14 Setting the Machine’s IP Address
When IP Setup is selected, press ENT and the display will show:

Push ◄ or ► and ▲ or ▼ and ENT keys to change the parameters. The default address of the engraver is192.168.1.100. If this is already in use on your local network, use 192.168.1 for the fi rst three sections and choosea unique value for the last section. Typically, any value from 2–252 except 47 should be OK but avoid valuesalready being used by your other networked devices. Direct connection of the machine to the public internet risksunauthorised use and is not recommended. If you wish to provide it anyway, you will need to register and use aunique public TCP/IP address. When you fi nish your adjustments, save them by selecting Write with the ENT keyor hit ESC to leave without saving your changes. Read can load saved parameters.

4.4.15 Diagnostic Tools
When Diagnoses is selected, the following dialogue box will pop up:

This interface displays the system’s hardware I/O port information:
INPUT: Reads the system’s hardware information. When the hardware signal is triggered, the small box to the left of the corresponding entry will be displayed in red. Otherwise, it will be displayed in grey.
OUTPUT: Select an output with the cursor. Press ENT to switch the output state or ESC to return to the main menu without any changes.

4.4.16 Setting the Screen Reference
When Screen Origin is selected, the following dialogue box will pop up:

This interface shows the position of the origin. Diff erent origin positions can generate diff erent refl ections of the graph over the X/Y axis. The operation method is the same as described above.

4.4.17 Adjusting Engraving Layers
When the system is idle or the work is fi nished, press ENT to enter the layer parameter section. Push ▲ or ▼ to select the intended layer. Press ENT to check the selected layer’s parameters as shown below:

The red cursor will be on “Layer” by default. Push the ◄ and ► keys to select the intended layer. Move the cursor to Write and press ENT to save the parameter change or ESC to exit without saving. The operation method is the same as that of the max./min.  power setting.

4.4.18 Adjusting Movement Parameters
In the Para Setting submenu, select Movement Parameters to display the following interface.

Select and adjust the parameters by pushing the arrows. When you finish your adjustments, move the cursor to Write and press ENT to save the parameter change or ESC to exit without saving. Read can load saved parameters.

4.4.19 Setting the Frame Parameters
In the Para Setting submenu, select Frame Setting to display the following interface:

Select and adjust the parameters by pushing the arrows. When you finish your adjustments, move the cursor to Write and press ENT to save the parameter change or ESC to exit without saving. Read can load saved parameters.
Start cutting frame will cut the frame according to the current parameters.

4.4.20 Setting the Blow Parameters
In the Para Setting submenu, select Blow Setting to display the following interface:

Select and adjust the parameters by pushing the arrows. When you finish your adjustments, move the cursor to Write and press ENT to save the parameter change or ESC to exit without saving. Read can load saved parameters.

4.4.21 Adjusting Reset Speeds
In the Para Setting submenu, select Speed Setting to display the following interface:

Select and adjust the parameters by pushing the arrows. When you finish your adjustments, move the cursor to Write and press ENT to save the parameter change or ESC to exit without saving. Read can load saved parameters.

4.4.22 Adjusting the Machine’s Confi guration
In the Para Setting submenu, select Machine Confi g to display the following interface:

Select and adjust the parameters by pushing the arrows. When you finish your adjustments, move the cursor to Write and press ENT to save the parameter change or ESC to exit without saving. Read can load saved parameters.

4.4.23 Adjusting Rotary Axis Parameters
In the Para Setting submenu, select Rotate Function Setting to display the following interface:

Select and adjust the parameters by pushing the arrows. When you fi nish your adjustments, move the cursor to Write and press ENT to save the parameter change or ESC to exit without saving. Read can load saved parameters.

4.4.24 Setting an Interface Password
When the cursor is on Panel Lock, press ENT, and the following dialogue box will pop up:

Push the ▲ and ▼ keys to select items. When the blue cursor is on the intended item, press ENT to enter the corresponding interface.

4.4.25 Backing Up & Restoring Parameters
In the main menu, select Controller Setup to display the following screen:

• Backup to U Disk: Saves current parameters to a USB fl ash drive.
• Restore Para from U Disk: Restores saved parameters from a fl ash drive.
• Upgrade from U Disk: Upgrades the controller software from a fl ash disk.

4.4.26 Setting the Machine’s Date and Time
In the Controller Setup submenu, select Time Setting+ to display the following interface:

Select and adjust the parameters by pushing the arrows. When you fi nish your adjustments, move the cursor to Write and press ENT to save the parameter change or ESC to exit without saving. Read can load saved parameters.

4.4.27 Authorisation Management and Keyboard Layout
Your engraver should arrive already authorised and ready to go. If you purchased your engraver on a lease plan and did not already receive your permission code, contact customer service. Enter it by going to the main menu and selecting Permission. The  following interface will pop up:

Press ENT once to select the fi rst fi eld, and press ENT a second time to bring up the keyboard.

Use the direction keys and ENT to select the correct character. Press ESC and then ENT to re-enter a fi eld if you make any mistakes. Use the arrow keys to move to the other entry fi elds, and enter their contents in the same way.
After all fi elds are correctly entered, select Change Permission Code and press ENT to leave this screen and return to the main menu.

Maintenance

5.1 Maintenance Overview
The use of procedures other than those specifi ed herein may result in hazardous laser radiation exposure.
Before any cleaning or maintenance work, always switch off the device and disconnect it from its power supply.
Always keep the system clean, as fl ammable debris in the working and exhaust areas constitutes a fi re hazard.
ONLY allow trained and skilled professionals to modify or disassemble this device.

• Clean and cool water must be provided to the system at all times.
• The workbed must be cleaned on a daily basis.
• The 3rd mirror and the focus lens must be checked every day and cleaned if required.
• The other mirrors, exhaust system, and air intake fi lter must be checked every week and cleaned if required.
• The beam alignment should be checked weekly.
• The wiring should be checked every week for loose connections, especially the wiring for the laser tube power supply.
• The guide rails should be cleaned and lubricated at least twice a month.
• The air assist must be checked every month and cleaned if required.
• The whole laser machine including the other components such as the water cooling system must be checked every month and cleaned where required.

5.2 Water Cooling System
NEVER touch or adjust your engraver’s water supply while the pump is still connected to power.
The laser tube requires cool and clean distilled water to avoid overheating. Tepid water at room temperature or a little below is ideal. The laser tube requires at least 7.5 litres (1.6 gal.) of cool and clean distilled water or other laser-safe coolant to avoid  overheating. If the temperature of the water ever approaches 38°C (100°F), discontinue work until it has cooled or fi nd a way to reduce its temperature without interrupting the supply of water to the laser tube. The water should never be allowed to become too  cold either, which could also cause the glass laser tube to shatter during use.
During winter or if ice is used to cool hot water, ensure the temperature never falls below 10°C (50°F).
More water should be added every few days to ensure evaporation does not cause the pump to become exposed during use.

5.3 Cleaning
5.3.1 Cleaning the Water System
NEVER touch or adjust your engraver’s water supply while the pump is still connected to power.
The water tank should be shielded from ambient dust created during work. If the water ever becomes visibly dirty, discontinue work. The debris in the water will reduce its cooling effi ciency, can heat up itself, and can damage the cooling pipes. Change the water,  place the water outlet tube into a separate bucket, and run the cooling system until all contaminated water has been fl ushed from the engraver. Clean the water tank itself before refi lling it with clean and cool distilled water, replacing the outlet tube, and continuing operation.
If the water remains visibly clean at all times, it is still recommended that you clean the water tank about once a month as a precaution, changing the water as you do so.

If you use an industrial water chiller instead of the provided pump, follow its separate instructions for maintenance but similarly ensure that the water used remains cool, clean, and pure.

5.3.2 Cleaning the Main Bay and Engraver
Check at least once a day whether dust has accumulated in the main engraving bay. If so, it must be removed. The exact cleaning interval and requirements strongly depend on the material being processed and the operating time of the device. A clean machine  guarantees optimal performance and reduces service costs, as well as reducing the risk of fi re or injury.
Clean the viewing window with mild cleansers and a lens or cotton cloth. DO NOT use paper towels as they can scratch the polycarbonate and reduce the cover’s ability to protect you from laser radiation. Clean the interior of the main bay thoroughly, removing  any debris particles or deposits. Paper towels and window cleaner are recommended. When necessary, clean the cover of the laser tube after it has been allowed to cool completely. Allow any fl uid used in any cleaning to dry completely before further use of the  engraver.

5.3.3 Cleaning the Focus Lens
The lens has a durable coating and won’t be damaged by correct and careful cleaning. You should check the lens and the 3rd mirror daily and clean them if there is any debris or haze on their surface. Your laser will be less effi cient and heat buildup on the oil or  dust itself can damage the lens.

1. Move the engraving table to a distance approximately 10 cm (4 in.) under the lens holder.

2. Move the laser head into the centre of the workbed and put a cloth under the lens holder so that the lens will not be damaged if it accidentally falls from its holder.

3. Unscrew the lens holder, rotating anti-clockwise.

4. Remove the pressurised air hose and laser guide connections.

5. Once positioned over your clean lens-cleaning tissue, remove the lens from the lens holder by carefully turning the lens holder and letting the lens and its O-ring drop onto the cleaning cloth.

6. Examine the O-ring and, if necessary, clean it with a cotton bud and a lens-cleaning tissue or cloth.

7. Remove coarse dust as well as possible by blowing air onto the lens surface.

8. Check the surface and, if necessary, clean the lens with the lens cleaning liquid and lens tissue or cloth.

9. Hold the lens assembly by its edge with a lens-cleaning tissue and use a drop of lens-cleaning liquid. While holding the lens at an angle, fl ush both surfaces to wash away grime.

10. Put the lens on a clean lens-cleaning tissue and put some lens-cleaning liquid on one side of the lens. Leave the liquid to take eff ect for approximately one minute and then gently wipe it away with lens-cleaning tissues soaked with lens-cleaning liquid. Dry  this side of the lens with dry lens-cleaning tissues/cloth.

11. Repeat the same cleaning process on the other side of the lens.
    NEVER use a cleaning tissue twice. Dust accumulated in the cleaning tissue could scratch the lens surface.

12. Examine the lens. If it is still dirty, repeat the cleaning process above until the lens is clean. Do not touch the surface of the lens after cleaning.

13. Carefully insert the lens into the lens holder, ensuring that its rounded convex side is facing upwards. Put the O-ring on top of the lens.

14. Carefully reassemble the lens and laser head attachments in reverse order.

5.3.4 Cleaning the Mirrors
The mirrors should be similarly cleaned if there is any debris or haze on their surface to improve performance and avoid permanent damage. The 1st mirror is located in the back left of the machine beyond the far end of the Y axis.
The end of the laser tube closest to this mirror is itself a semitransparent mirror that should be checked at the same time. The 2nd mirror is located on the Y axis at the left end of the X axis. The 3rd mirror is located on top of the laser head on the X axis. The  most detritus accumulates on the 3rd mirror and it should be checked daily along with the focus lens. The laser tube and the 1st and 2nd mirrors can be checked daily if desired but are usually fine if they are only checked once a week.

The semitransparent mirror at the end of the laser tube should only be cleaned when the engraver is fully disconnected from power and the tube is fully cooled. Clean all four mirrors with lens-cleaning tissue or with cotton wetted with lens-cleaning liquid or  isopropyl alcohol. The 3 positioning mirrors can be cleaned in place or removed for cleaning by turning them anti-clockwise. Take care not to touch the surface of any mirror directly. Clean with gentle circular motions and avoid pressing hard enough to grind  any debris or cause scratching. If any mirrors are removed for cleaning, reinstall them by turning them into place clockwise while again being careful to avoid any scratching.

5.4 Laser Path Alignment
Having a proper beam alignment is important for the overall effi ciency of the machine and quality of its work. This machine went through a complete beam alignment before shipping. When the engraver fi rst arrives and about once a week during normal  operation, however, it is recommended that users confi rm that alignment is still at acceptable levels and that the mirrors and focus lens have not shifted due to the movement of the machine.

You will need to place a piece of tape at each stage of the laser path, marking it to confi rm that that stage remains correctly aligned. When it is not, you will use the laser tube’s brackets or the screws on the back of the misaligned mirror to correct the problem.  Once the provided tape runs out, we recommend masking tape as it is easy to manage and use.

Performing a beam alignment can expose the operator to small amounts of radiation if performed carelessly.
Follow these procedures correctly and always take caution when performing a beam alignment.

Perform a beam alignment at low power levels: 15% or less. Any higher percentage will cause the laser to ignite the testing tape instead of marking it. Be sure that you set the Max. Power (not Min.) to 15%.

5.4.1 Red Dot Locator Alignment
To test the alignment of the laser tube with the 1st mirror, cut out a piece of tape and place it on the mirror’s frame.

DO NOT place the tape directly onto the mirror. Turn on the machine and set the power level to 15% or lower.
Press PULSE to manually fi re the laser. You should be able to see a small mark on the tape. If it is not noticeable, press PULSE again.

Pressing PULSE activates the laser. Always make sure the path is clear between the laser and its target.
Never allow foreign objects between the laser and its target. Take care not to leave any part of your body in the laser path while pressing the PULSE button.

The laser mark should be near the centre of the hole. If the laser is not centred on the 1st mirror, cut the power to your laser and carefully adjust the laser tube in its brackets. This may require loosening the bolts on its stand. Be careful not to overloosen the bolts  and not to overtighten them. Only adjust one stand at a time.

5.4.2 1st Mirror Alignment
After ensuring the laser is well aligned between the laser tube and 1st mirror, check the alignment between the 1st and 2nd mirrors. First, use the direction arrows on the control panel to send the 2nd mirror to the back of the bed along the Y axis.

Once set, place a piece of tape on the 2nd mirror’s frame. DO NOT place the tape directly onto the mirror. Repeat the steps from §5.4.1. If the laser is not centred on the 2nd mirror, you will need to adjust the 1st mirror’s set screws accordingly.

To adjust the mirror, loosen the nut on the screw and then slightly turn the screw either clockwise or anti-clockwise.
Each screw adjusts a diff erent position or angle. Keep track of which screw you are adjusting and the direction of adjustment. Do not turn the screw more than ¼ turn at a time and, especially at fi rst, test the position of the laser after each adjustment so that  you learn the eff ect of each change. Test until the beam is well aligned and then retighten the nuts on the screws once all adjustments are completed.
Next, use the direction arrows on the control panel to send the 2nd mirror to the front of the bed along the Y axis.

Once set, place another piece of tape on the 2nd mirror’s frame. DO NOT place the tape directly onto the mirror.
Repeat the steps from §5.4.1 and, if necessary, adjust the set screws on the 1st mirror. Test again until the beam is well aligned and retighten the nuts on the set screws.

5.4.3 2nd Mirror Alignment
After ensuring the laser is well aligned between the 1st and 2nd mirrors, check the alignment between the 2nd and 3rd mirrors. Repeat the steps and adjustments above, taking care to use the tape on the mirror’s frame and not its surface.

5.4.4 3rd Mirror Alignment
After ensuring the laser is well aligned between the 2nd and 3rd mirrors, check the alignment between the 3rd mirror and the workbed. First, unplug the air assist hose from the laser head. Then, place a piece of tape across the bottom of the laser head and press  it onto the nozzle with some force. This will leave a ring mark that can help you check the accuracy. Repeat the steps from §5.4.1. If the laser is not centred through the laser head, adjust the 3rd mirror’s set screws accordingly as in §5.4.2. Test again until the  beam is well aligned and retighten the nuts on the set screws.

When the laser is well centred along the entire path from the tube to the workbed, your laser mirrors are all correctly calibrated and (assuming they are clean) performing at optimum effi ciency.

5.5 Lubrication Instructions
For best results, clean and lubricate the engraver’s guide rails every two weeks. Turn off the laser engraver. Gently move the laser head out of the way. Wipe away all dust and debris along the X and Y axis rails with a dry cotton cloth until they are shiny and clean.  Do the same to the Z axis screws. Lubricate both the rails and screws with white lithium grease. Gently move the laser head and X axis to distribute the lubricant evenly along both rails and raise and lower the bed to distribute the lubricant evenly along the screws.

5.6 Parts Replacement
The engraver should not be modified or disassembled by anyone except trained and skilled professionals, but some consumable parts may require replacement after prolonged use. Be sure only to use identical or compatible replacement parts with this engraver.  Contact your vendor or our technicians if you have any questions about fitment. Using incompatible components is highly dangerous and waives all the manufacturer’s liability for any damage or injury caused.

ALWAYS completely disconnect the engraver from its power supply before replacing any parts.

Take special care when replacing the laser tube or its power supply, as both have extremely high voltage connections. If you replace the power supply with an identical model, you will be able to use the same screw terminal blocks as a unit. If you change to a diff  erent laser power supply, refer to the following diagram:

FG: Ground Wire for the Mains and Case
AC₁: Neutral Wire to the Main Power
AC₂: Live Input from the Main Power
H: Connection for Active-High Devices
L: Connection for Active-Low Devices (like this machine)
P: Line to the Trigger, Water, & Other Systems (like the door switch)
G: Ground Wire for the Control System, PWM Level Shifters, Potentiometers, &c.
IN: Input Power for PWM Level Shifters or Potentiometers
5V: 5V Connection for Digital Signals

5.7 Disposal
Electrical products should not be disposed of with household products. In the EU and UK, according to the European Directive 2012/19/EU for the disposal of electrical and electronic equipment and its implementation in national laws, used electrical products  must be collected separately and disposed of at the collection points provided for this purpose. Locations in Australia, Canada, and the United States may have similar regulations. Contact your local authorities or dealer for disposal and recycling advice.

Contact Us
Thank you for choosing our laser equipment for your home or shop! For a .pdf copy of the latest version of this manual, use the appropriate app on your smartphone or other device to scan the QR code to the right.

https://sp9c.com/8BFRx

Come join the OMTech community at our official laser group on Facebook orvisit the company forums at omtechlaser.com! Check our YouTube channel forhelpful hints and instructional videos. If you encounter any problem regardingyour engraver, do not hesitate to contact customer service with your order numberat help@cs-supportpro.com or techsupport@omtechlaser.com. Our teams willrespond within 24 hours to make things right. You can also reach us Monday toFriday at 949-539-0458 between 8 am and 4:30 pm PST.
Thank you and we hope you will choose us again for all your laser needs!

U S B – 0 5 0 3 – K 1
Rev. 19. Jul 2023

Documents / Resources

| OMTech UK USB350n Cabinet Laser Engraver [pdf] User Manual
USB350n Cabinet Laser Engraver, USB350n, Cabinet Laser Engraver, Laser Engraver, Engraver
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References

• Laser Engraver and Cutting Machines - OMTech Laser
• Transparent outsourced web hosting tech support |SupportPRO

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