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Common Faults and Solutions for CO2 Laser Tubes
2026-02-25
CO₂ Laser Tubes are widely used in laser engraving and cutting machines. They often have some common faults during use. Here aresimple and practical solutions.
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1. No laser output
🔍 Causes:
Poor power connection, damaged laser tube, faulty power supply, or incorrect wiring.
🛠️ Solutions:
- Check and reconnect the power and signal wires firmly.
- Inspect the laser tube for cracks or leaks.
- Test the laser power supply and replace it if damaged.
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🔅
2. Weak laser power
Causes: Aging tube, dirty lens or mirror, poor cooling, or long working hours.
✅ Solutions
- Clean the Laser Lens and reflecting mirrors regularly.
- Ensure the water cooling system works normally and the water flow is stable.
- Replace the laser tube if it has been used for a long time.
🌡️
3. Laser tube overheating
🔥 Causes: Blocked water pipe, insufficient cooling water, or broken water pump.
🧊 Solutions:
- Clean the cooling water pipe and remove blockages.
- Replace with clean cooling water and check the water pump.
- Do not use the machine if the cooling system fails.
📉
4. Unstable cutting or engraving effect
Causes: Loose optical path, uneven laser spot, or unstable voltage.
⚙️ Solutions:
- Adjust and fix the optical path to keep the laser centered.
- Stabilize the working voltage of the machine.
- Check whether the laser tube is properly installed.
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Conclusion
Most CO₂ laser tube faults are related to cooling, cleaning, and wiring. Regular maintenance can greatly extend the service life and improve working stability.