1. Introduction
The Laser Tree LT-20W-A is a 4W (optical output power) blue laser module with a 450nm wavelength, designed for use with CNC milling machines and DIY engraving setups. It offers an effective output power of 20W, making it a versatile tool for both laser engraving and cutting a wide range of materials.
Key Features:
- High Performance: Professional laser head with high speed and stability.
- Precise Spot: Bright blue-violet light for easy locating and precise engraving.
- Adjustable Focus: Features an adjustable laser head for fine-tuning focus, ensuring optimal engraving quality and efficiency.
- Compact Design: Small, compact, and convenient for easy installation.
Video: Product demonstration showing engraving and cutting capabilities.
2. Safety Information
DANGER: LASER RADIATION. AVOID DIRECT EYE EXPOSURE.
This laser module emits high-intensity blue laser light. Improper use can cause severe eye injury, skin burns, and fire hazards. Always adhere to the following safety precautions:
- Wear Protective Eyewear: Always wear certified laser safety goggles that block 450nm blue light when operating the laser module.
- Avoid Direct Exposure: Never look directly into the laser beam or its reflection.
- Work in a Safe Environment: Operate the laser in a well-ventilated area, away from flammable materials, children, and pets.
- Enclosure Recommended: Consider using a laser-safe enclosure to contain the laser beam and fumes.
- Disconnect Power: Always disconnect power before performing any maintenance or adjustments.
- Emergency Stop: Ensure your laser machine has an easily accessible emergency stop button.
Image: Laser module with visible safety warning.
3. Specifications
| Parameter | Value |
|---|---|
| Model Number | LT-20W-A |
| Brand Name | Laser Tree |
| Effect Output Power | 20W |
| Output Optical Power | 4W (±0.5W) |
| Wavelength | 450nm (±10nm) |
| Light Color | Blue |
| Material | Aluminum Alloy + Plastic |
| Input Voltage | 12V 1.6A (1.4A-1.8A) |
| PWM Modulation | Support 5V PWM modulation |
| Input Interface | XH2.54-3P socket |
| Cable Length | 80cm (3PIN) |
| Module Size (LWH) | 95mm x 35mm x 35mm |
| Module Weight | 146g |
| Fan Size | 35*35*10mm |
| Drive Protection | Surge protection, overvoltage protection |
| Operating Temperature | 0-70°C |
| Main Application | Engraving / Cutting |
Image: Detailed specifications and wiring diagram.
4. Package Contents
Verify that all items are present in your package:
- 1 x Laser Tree LT-20W-A Laser Head
- 1 x 3-Pin Input Cable (80cm)
Image: Package contents.
5. Setup and Installation
5.1 Physical Installation
The LT-20W-A laser module has dimensions of 95mm (height) x 35mm (width) x 35mm (depth). It features mounting holes (4-M3) for secure attachment to your CNC machine or DIY engraving setup. Ensure your machine's mounting bracket is compatible with these dimensions and hole patterns.
Image: Laser module dimensions and components.
5.2 Electrical Connection (Wiring)
The laser module connects via an XH2.54-3P socket. Use the provided 3-pin input cable for connection to your control board. The cable colors correspond to the following functions:
- Red Wire: Power (+12V)
- Black Wire: Ground (GND)
- Yellow Wire: PWM (0/5V-12V, 0-5KHz)
Ensure your control board provides a 12V power supply (1.4A-1.8A) and supports 5V PWM modulation for laser power control.
Image: Technical drawing with wiring diagram.
5.3 Compatibility with Laser Machines
The LT-20W-A module is designed for broad compatibility. Refer to the table below for common machine types and their connection requirements:
| Brand | Laser Machine Model | Pins | Power | LT-20W-A Integration |
|---|---|---|---|---|
| Ortur | Ortur Laser Master | 3pin | 12V 3A | Plug and Play |
| Ortur | Ortur Laser Master 2 Pro | 3pin | 24V 2A | Driver Adapter + 12V Power Supply |
| Ortur | Ortur Laser Master 2 | 3pin | 12V 3A | Plug and Play |
| Atomstack | Atomstack A5 20W Laser Engraving Machines | 3pin | 12V 5A | Plug and Play |
| Atomstack | Atomstack A5Pro 40W Laser Engraver | 3pin | 12V 5A | Plug and Play |
| Atomstack | A5 10W laser engraver | 3pin | 12V 5A | Plug and Play |
| Others | CNC Machine | 3pin | 12V | Plug and Play |
| Others | CNC Machine | 4pin | 12V | Driver Adapter |
| Others | CNC Machine | 3pin | 24V | Driver Adapter + 12V Power Supply |
| Others | CNC Machine | 4pin | 24V | Driver Adapter + 12V Power Supply |
Image: Laser machine compatibility chart.
6. Operation
6.1 Focusing the Laser
The LT-20W-A features an adjustable focus mechanism. To adjust the focus, rotate the knob at the front of the laser module. Proper focusing is crucial for achieving clean engraving and efficient cutting results.
- Recommended Engraving Focal Length: 20mm
- Recommended Cutting Focal Length: 50mm
Adjust the lens until the laser spot on the material is as small and sharp as possible for optimal performance.
Image: Adjustable focus mechanism and cutting example.
Image: Focus setting reference.
6.2 Compatible Materials
The LT-20W-A laser module can engrave and cut a variety of materials:
| Material Type | Application |
|---|---|
| Wood | Engraving / Cutting (e.g., 1-2mm plywood in one pass) |
| Paper | Engraving / Cutting |
| Leather | Engraving |
| Bamboo | Engraving / Cutting |
| Plastic | Engraving / Cutting |
| Rubber | Engraving |
| Alumina | Marking / Engraving |
Image: Compatible engraving and cutting materials.
Image: Laser module engraving a clock design.
7. Maintenance
To ensure the longevity and optimal performance of your laser module, follow these maintenance guidelines:
- Keep the Lens Clean: Regularly inspect and gently clean the laser lens with a lint-free cloth and lens cleaning solution to prevent dust and debris from affecting beam quality.
- Ensure Proper Cooling: The module includes a cooling fan. Ensure it is free from obstructions and operating correctly to prevent overheating.
- Store Properly: When not in use, store the laser module in a clean, dry, and dust-free environment.
- Avoid Physical Impact: Handle the module with care to prevent damage from drops or impacts.
8. Troubleshooting
If you encounter issues with your Laser Tree LT-20W-A module, consider the following common problems and solutions:
- No Laser Output:
- Check all electrical connections (power, ground, PWM) to ensure they are secure and correctly wired.
- Verify that the power supply meets the 12V 1.6A (1.4A-1.8A) requirement.
- Confirm that the PWM signal is being sent from your control board.
- Weak Engraving/Cutting:
- Focus Adjustment: Re-adjust the laser focus. An out-of-focus beam will result in poor performance.
- Power Settings: Increase the laser power setting in your engraving software.
- Speed Settings: Decrease the engraving/cutting speed in your software.
- Material Compatibility: Ensure the material is compatible with this laser module and that appropriate settings are used.
- Dirty Lens: Clean the laser lens as described in the Maintenance section.
- Module Overheating:
- Ensure the cooling fan is running and not obstructed.
- Operate in a well-ventilated area.
- Reduce continuous operating time if necessary.
- Compatibility Issues with Machine:
- Refer to the compatibility table in Section 5.3. Ensure your machine's pin configuration and power supply match the requirements for the LT-20W-A.
- If your machine requires a driver adapter or external 12V power supply, ensure these are correctly installed.
9. User Tips
- Verify Compatibility: Before purchasing or installing, always double-check the compatibility of the LT-20W-A with your specific laser engraving machine model, especially regarding pin configuration and power requirements.
- Optimal Focusing: Spend time fine-tuning the focus for each material and task (engraving vs. cutting). A sharp, small laser dot is key to achieving the best results.
- Test Settings: Always perform small test engravings or cuts on scrap material to find the optimal power and speed settings before starting your main project.
10. Warranty and Support
Laser Tree Global Store offers the following services:
- 7-Day Return Policy: Enjoy 7 days to return the product if there are any quality problems.
- Online Service: Timely customer service is available to help solve various problems you may encounter.
For any questions or support, please contact the Laser Tree Global Store directly.
Image: Warranty and service information.
