1. Introduction
This manual provides detailed instructions for the safe and efficient operation and maintenance of your Sihao USBKZJ40W 40W CO2 Laser Engraver & Cutter Machine. This advanced machine integrates light, mechanical, and electrical components for high-precision and high-speed laser engraving and cutting.
This brand new DC-KIII CO2 laser engraver is equipped with one 40W water cooling laser tube, high precise stepping motors, high quality control board. It employs an USB port and thus can be connected to your laptop or desktop. By the support of included software, Coreldraw, this machine can work well with multiple graphic formats including EMF/JPG/PLT/WMF. CorelDraw has the ability of both NewlySeal and NewlyDraw and so it can be employed in both carving and cutting works.

2. Safety Information
- Always ensure proper ventilation when operating the machine.
- Never operate the machine with the lid open during engraving or cutting.
- Do not adjust the laser path or protective cover while the machine is in operation.
- Ensure the water cooling system is functioning correctly and water is circulating before starting.
- Use pure water for the cooling system to prevent damage to the laser tube.
- Avoid freezing the water in the laser tube to prevent cracking.
- Ensure the machine is connected to the correct voltage (110V or 220V as specified for your model). The control panel indicates a normal voltage of 220V.
- Wear appropriate laser safety glasses to protect your eyes.
- Keep flammable materials away from the working area.
- In case of emergency, immediately press the red "Emergency Stop" button.
3. Product Components and Features
3.1 Package Contents
Upon unpacking, verify that all components are present:
- 40W CO2 Laser Engraver Machine
- Water Pump
- Exhaust Pipe
- USB Cable
- Software CD (CorelDraw)
- Power Cable
- Grease/Lubricant
- User Manual (this document)

3.2 Key Features
- CO2 Laser Tube: Advanced sealed-off 40W laser tube with high-pressure discharge for engraving and cutting at 10.6um wavelength.
- Premium Laser Head: High-precision laser head for reliable performance and durability.
- Accurate LCD Panel: Digital display for temperature and laser power, with laser switch, emergency stop, power switch, and lighting switch.
- USB Connectivity: USB port for convenient connection to desktop or laptop, enabling precise control.
- Effective Heat Dissipation: Built-in heat dispersed fan and pipeline exhaust fan to reduce electronic component temperatures and extend lifespan.
- Convenient Wheels & Handle: Equipped with 4 rotational wheels and a handle for easy movement and positioning.
- Upgraded Design: Features an LED strip light and window support for improved visibility and operation compared to older models.


4. Setup Instructions
4.1 Unpacking and Placement
- Carefully remove the machine and all accessories from the packaging.
- Place the machine on a stable, level surface in a well-ventilated area.
- Ensure adequate space around the machine for air circulation and exhaust.
- If your model includes rotational wheels, you can use them to position the machine easily.
4.2 Water Cooling System Connection
The water cooling system is crucial for the laser tube's longevity and performance.
- Connect the provided water pump to the "Water Inlet" and "Water Outlet" ports on the rear of the machine using the supplied tubing.
- Place the water pump in a bucket or reservoir filled with pure water. Ensure the water level is sufficient to submerge the pump.
- Verify that the water lines are securely linked and free from kinks or blockages.
- Important: Before operating the machine, always examine whether the water of the water pump circulates in line. Do not let the water ice up to avoid cracking the laser tube.


4.3 Exhaust System Connection
- Connect the exhaust pipe to the exhaust port on the machine.
- Direct the other end of the exhaust pipe to an outdoor vent or a suitable air filtration system to remove smoke and fumes.
4.4 Power Connection
- Connect the power cable to the machine's power input and then to a grounded electrical outlet.
- The machine supports dual voltage (110V/220V). Ensure the correct voltage is selected or supplied based on your region and machine configuration. The control panel image indicates a normal voltage of 220V.
4.5 Software Installation
- Insert the provided CorelDraw software CD into your computer's CD/DVD drive.
- Follow the on-screen instructions to install CorelDraw.
- Connect the machine to your computer using the supplied USB cable.
- Install any necessary drivers for the laser engraver, typically found on the software CD or provided by the manufacturer.
- The software environment supports Windows XP, WIN7, WIN8, WIN10.
5. Operating Instructions
5.1 Control Panel Overview
Familiarize yourself with the control panel:

- Emergency Stop Button: Large red button for immediate shutdown in emergencies.
- Switch Machine: Main power switch for the machine.
- Temperature Display: Shows the current temperature.
- Laser Power Display: Digital display showing laser power percentage (e.g., "00.0%").
- Laser Power Adjustment Buttons (+/-): Used to increase or decrease laser power.
- Laser Test Switch: For testing the laser beam (use with caution).
- Light Instruction: Indicator light.
- Lighting Switch: Controls internal lighting.
- Power Switch: Main power for the laser system.
5.2 Basic Operation Steps
- Power On: Ensure all connections (water, exhaust, power, USB) are secure. Turn on the main power switch ("Switch Machine").
- Water Cooling Check: Verify that the water pump is running and water is circulating through the laser tube. The temperature display should show a stable reading.
- Software Preparation: Open CorelDraw on your computer. Import or create your design.
- Material Placement: Place the material to be engraved or cut onto the working platform. Ensure it is flat and properly positioned. The working area is 30x20cm (12x8 inches).
- Focus Adjustment: Adjust the laser head's focus according to the material thickness. Refer to the software instructions for precise focusing.
- Laser Power Setting: Use the laser power adjustment buttons on the control panel or the software to set the desired laser power. Start with lower power settings for new materials.
- Start Engraving/Cutting: Send the job from CorelDraw to the laser engraver.
- Supervision: Always supervise the machine during operation. Keep the lid closed while engraving to contain laser light and fumes. The protective cover should not be adjusted during operation.
- Emergency Stop: In case of any malfunction or emergency, immediately press the red "Emergency Stop" button.
- Power Off: After completing the job, turn off the laser power switch, then the main machine switch. Disconnect power if the machine will not be used for an extended period.
5.3 Applicable Materials and Industries
This machine is designed for engraving and cutting a wide range of non-metal materials:
- Wood, Paper, Leather, Cloth
- Plexiglas (cuts rather shallow on normal glass)
- Epoxy Resin, Density Board, Double-colored Board
- Marble, Plastic, Rubber, Crystal, Bamboo
- Other non-metal materials.
Note: This laser engraving machine cannot carve or cut metal or ceramics.
Applicable industries include seal engraving, advertisement, art gifts, garment, leather, toy manufacturing, building upholstery, computerized embroidery, packing and printing, paper products, garment sampling, large width tailoring, shoemaking, furniture, craftwork, nameplates, decorations, and woodcut.


6. Maintenance
6.1 Routine Cleaning
- Regularly clean the working platform and interior of the machine to remove dust and debris from engraved/cut materials.
- Clean the laser lens and mirrors with a soft, lint-free cloth and appropriate lens cleaning solution to maintain optimal laser performance.
- Ensure the exhaust fan and pipes are clear of obstructions.
6.2 Water Cooling System Maintenance
- Regularly check the water level in the reservoir and refill with pure water as needed.
- Change the water in the cooling system periodically (e.g., weekly or bi-weekly depending on usage) to prevent algae growth and maintain cooling efficiency.
- Ensure the water temperature remains within the recommended operating range (5-50℃ / 41-122℉).
- Prevent the water from freezing, especially in colder environments, to avoid damage to the laser tube.
6.3 Laser Tube and Components
- The typical lifespan of the CO2 laser tube is 1000-1300 hours. Monitor performance and consider replacement when output degrades significantly.
- Recommended spare parts include the laser tube, focal lens, and reflection lens.
- Lubricate moving parts (e.g., guide rails) with the provided grease or a suitable lubricant as part of routine maintenance to ensure smooth operation and precision.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Machine does not power on | Power cable disconnected, power switch off, emergency stop engaged. | Check power cable connection. Ensure "Switch Machine" is on. Release the emergency stop button by twisting it. |
| Laser not firing or weak output | Water cooling not circulating, laser power set too low, laser tube fault, dirty lens/mirrors. | Examine water pump circulation and water level. Increase laser power setting. Clean optical components. Contact support if laser tube is faulty. |
| Poor engraving/cutting quality | Incorrect focus, wrong power/speed settings, material issues, dirty optics. | Adjust focus. Optimize power and speed settings for the material. Clean lens and mirrors. Ensure material is flat. |
| Water cooling system not working | Water pump disconnected, water lines kinked/blocked, pump malfunction. | Check water pump power and connections. Ensure water lines are clear. Verify water level. Replace pump if faulty. |
| Software communication error | USB cable disconnected, driver issues, software not properly installed. | Check USB cable connection. Reinstall drivers. Reinstall CorelDraw software. |
8. Specifications
| Feature | Specification |
|---|---|
| Model Number | USBKZJ40W |
| Laser Type | CO2 Gas |
| Laser Tube Power | 40W |
| Laser Tube Life | 1000-1300 hours |
| Engraving Area | 300x200mm (12x8 inches) |
| Maximum Item Size to Engrave | 260mm x 220mm x 70mm (10.25 x 8.75 x 2.85 inches) |
| Engraving Speed | 0-350mm/s (0-13.8 in./s) |
| Cutting Speed | 0-350mm/s (0-13.8 in./s) |
| Free Speed | 1-200 mm/s (0.04-7.87 inch/s) |
| Minimum Shaping Character | 1mm x 1mm (0.04 x 0.04 inches) |
| Minimum Forming Text | 2x2 mm (0.08x0.08 inch) |
| Resolution Ratio | 0.026mm (1000dpi) |
| Engraving Cutting Precision | 2500dpi |
| Resetting Positioning | ≤0.01mm (0.0004 inch) |
| Positioning Accuracy | 0.01mm (0.0004 inch) |
| Interface to Computer | USB Port |
| Software Supported | CorelDraw software (both NewlyDraw and NewSeal function) |
| Software Environment | Windows XP, WIN7, WIN8, WIN10 |
| Operating Temperature | 0-45℃ (32-113℉) |
| Cooling Way | Water cooling (water pump included) |
| Power Consumption | 300W |
| Recommended Spare Parts/Consumables | Laser Tube, Focal lens, Reflection lens |
| Origin | Mainland China |
9. User Tips
- Plexiglass/Acrylic: While the machine can cut Plexiglas, note that it cuts rather shallow on normal glass. For acrylic, experiment with power and speed settings to achieve desired depth and clean cuts. Multiple passes at lower power might yield better results for thicker acrylic.
- Material Testing: Always perform small test engravings or cuts on scrap material before starting a large project to fine-tune power and speed settings.
- Ventilation: Even with the exhaust fan, ensure the work area is well-ventilated to dissipate any residual fumes.
- Software Learning: Take time to learn the full capabilities of CorelDraw, especially the NewlySeal and NewlyDraw functions, to maximize your machine's potential.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the manufacturer or your point of purchase. When contacting support, please provide your machine's model number (USBKZJ40W) and any relevant purchase details.
Brand: Sihao