1. Introduction
The NEJE DK-8-KZ laser engraving machine is a portable, multi-functional device designed for engraving various materials. It supports common image formats such as BMP and JPG. Users can create their own designs or utilize the "NEJE Scanner" Android application to capture images for direct engraving. The machine operates with a 5V2A USB adapter or mobile power supply, offering portability and flexibility. It provides faster and more powerful engraving capabilities on surfaces ranging from wood to painted metal.
Figure 1: NEJE DK-8-KZ Laser Engraving Machine in operation.
2. Safety Information
WARNING: This product uses a laser. Always follow safety precautions to prevent injury.
- Eye Protection: Never look directly into the laser beam. Always use the magnetic easy-to-detach protective panel or wear appropriate laser safety glasses during operation to protect your eyesight.
- Emergency Stop: The ON/OFF button also functions as an emergency stop. Press it immediately if any unsafe condition occurs.
- Ventilation: Ensure adequate ventilation in the work area to dissipate any fumes produced during engraving.
- Flammable Materials: Do not engrave highly flammable materials without proper precautions. Keep a fire extinguisher nearby.
- Children and Pets: Keep the device out of reach of children and pets.
- Certifications: The device is CE, FCC, and FDA certified, indicating compliance with relevant safety standards. It is designed to be radiation-free.
Figure 2: Magnetic protective panel for eye safety.
Figure 3: ON/OFF button, also serving as an emergency stop.
3. Product Overview
The NEJE DK-8-KZ is a compact desktop laser engraver featuring an all-metal precision mechanical drive screw structure for accurate movement. It includes a cooling fan for heat dissipation and an easily replaceable laser tube. The device is designed for user-friendliness and safety.
3.1 Package Contents
Upon unpacking, ensure all the following items are present:
- NEJE DK-8-KZ Laser Engraving Machine
- Protective Panel (magnetic)
- USB Cables (for data and power)
- 5V/2A Power Adapter
- Sample Engraving Materials
- User Manual (this document)
- Green Focus Piece
Figure 4: Typical package contents.
3.2 Device Ports and Controls
- Power Port: Connects to the 5V/2A power adapter or a PC for power.
- Data Port: Connects to your PC via USB for data transfer and control.
- ON/OFF Button: Powers the device on/off and acts as an emergency stop.
Figure 5: Power and Data ports.
4. Specifications
| Feature | Specification |
|---|---|
| Brand | NEJE |
| Model | DK-8-KZ |
| Laser Power Options | 1500MW, 2000MW, 3000MW |
| Laser Wavelength | 445nm (Violet Blue) |
| Image Formats | JPG, JPEG, PNG, BMP |
| Image Size | 490x490 pixels; 0.075mm point distance |
| Image Engraving Pattern | Bitmap engraving |
| Supply Voltage | 5V2A (USB) |
| Rated Voltage Range | AC single-phase and DC 50V or less |
| Power Supply Type | Direct current |
| Support System | XP, Win7, Win8, Win10, Mac OS |
| Support Software | NEJE software, NEJE Scanner app |
| Supported Languages | Chinese, English, French, Italian, German, Japanese |
| Work Area | 38mm x 38mm |
| Product Dimensions | 16cm x 14.5cm x 20cm |
| Net Weight | 1.1 KG |
| Package Size | 310mm x 205mm x 235mm |
| Package Weight | 1.8 KG |
| Origin | Mainland China |
Figure 6: Supported image formats.
5. Setup
- Unpack the Machine: Carefully remove the laser engraving machine and all accessories from the packaging. Remove any tape or EPE (Expanded Polyethylene) used for securing components during transit. Check for a pearl cotton pad below the bottom plate and behind the radiator, and remove it.
- Place the Machine: Position the machine on a stable, flat surface in a well-ventilated area.
- Connect to Power: Connect the provided 5V/2A power adapter to the machine's power port and then to a power outlet. Alternatively, you can power it via a USB port on your PC.
- Connect to Computer: Use the provided USB cable to connect the machine's data port to your computer. The machine is compatible with Windows (XP, 7, 8, 10) and Mac OS.
- Install Software:
- For PC: Install the NEJE software on your Windows or Mac OS computer. Refer to the included software instructions or the NEJE website for download and installation.
- For Mobile: Download and install the "NEJE Scanner" app on your Android device. This app allows for hand-drawn creations, photo scanning, and direct transfer to the engraver.
- Initial Check: Turn on the machine using the ON/OFF button. The software should automatically detect and connect to the device.
Video 1: Demonstration of drawing, scanning with the NEJE Scanner app, and engraving.
6. Operating Instructions
6.1 Preparing for Engraving
- Material Placement: Place the material you wish to engrave on the engraving platform. Ensure it is stable and flat.
- Focus Adjustment: The laser head features a focusing cap. Rotate this cap to adjust the laser focus. Use the provided green focus piece to ensure the minimum focus point is precisely on the surface of the object. A smaller focal point results in better engraving effect and higher precision.
- Protective Panel: Always ensure the magnetic protective panel is in place or wear laser safety glasses before starting any engraving task.
Figure 7: Laser focus adjustment for optimal engraving.
6.2 Using the Software
The NEJE software (for PC) and NEJE Scanner app (for mobile) provide the interface for controlling the engraver.
- Image Selection/Creation:
- PC Software: Import images (JPG, JPEG, PNG, BMP) into the NEJE software. The software features a professional word processing algorithm to restore your design accurately.
- NEJE Scanner App: Use the app to scan hand-drawn pictures or existing photos. The app's intelligent algorithm will process the image for engraving and allow direct transfer to the machine.
- Image Adjustment: Within the software, you can adjust image size, position, and apply various image algorithms to enhance the engraving characteristics.
- Start Engraving: Once the image is prepared and settings are configured, initiate the engraving process through the software.
Figure 8: NEJE software interface on various devices.
6.3 Supported Materials
The NEJE DK-8-KZ can engrave a wide range of materials, including:
- Wood
- Bamboo
- Paper cards
- Ivory
- Leather
- Flammable plastic
- PCBA (Printed Circuit Board Assembly)
- Fruits and food
- Painted materials
Figure 9: Examples of engravable materials.
6.4 Unsupported Materials
The machine cannot engrave the following materials:
- Metal
- Aluminum
- Clear acrylic
7. Maintenance
- Cleaning: Regularly clean the engraving platform and the laser lens to ensure optimal performance and prevent debris buildup. Use a soft, dry cloth.
- Laser Tube Replacement: The laser tube is designed for easy replacement. Refer to the software's e-tutorial contents or contact support for detailed instructions if replacement is needed.
- Cooling System: The machine features a cooling fan and radiator design. Ensure the fan vents are not obstructed to maintain proper cooling during operation.
- Motherboard Compatibility: The motherboard is compatible with multiple power lasers (1000mw 2pin, 1500mw 2pin, 2000mw 2pin, 3000mw 4pin) and supports 2pin MOS control and 4pin TTL control with temperature sensing. This allows for potential upgrades to higher power laser modules.
Figure 10: Motherboard connections for various laser modules.
Figure 11: Laser module wiring details.
8. Troubleshooting
- Machine Not Connecting: Ensure the USB data cable is securely connected to both the machine and the computer. Verify that the NEJE software is running and that the machine is powered on. Try restarting both the software and the machine.
- Laser Not Firing/Weak Engraving: Check the laser focus. Ensure the minimum focus point is on the material surface. Verify the laser power settings in the software. Ensure the laser tube is correctly installed and not damaged.
- Engraving Quality Issues: Adjust the image resolution and engraving parameters in the software. Ensure the material is clean and properly positioned. Re-check the laser focus.
- Software Issues: If the software is unresponsive or displaying errors, try restarting it. Ensure your operating system and NEJE software are up to date.
9. User Tips
- Understanding Laser Power (MW): The laser power (1500MW, 2000MW, 3000MW) indicates the strength of the laser. Higher wattage generally means faster engraving speeds and the ability to engrave deeper or on slightly harder materials. Choose the appropriate power level based on your material and desired engraving depth.
- Portable Power: The machine's 5V2A USB power requirement makes it highly portable. You can use a standard USB power adapter or even a mobile power bank, allowing you to operate it in various locations without needing a specific 220V outlet.
- Multi-Machine Control: For advanced users or production environments, the NEJE software supports controlling up to 10 machines simultaneously from a single computer, enabling parallel engraving and offline work.
- NEJE Cloud: Explore the "NEJE CLOUD" service for a vast library of engraving materials and designs, which is regularly updated.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact the manufacturer/seller directly. Keep your proof of purchase for any warranty claims.