Proper maintenance and storage of laser systems are essential to ensure long-term reliability and performance. Whether shutting down for an extended period or preparing for restart, following the correct procedures can prevent costly damage and ensure seamless operation. This guide outlines key steps to safely store, maintain, and restart laser components.

How to Shut Down a Laser System Safely

Before disconnecting the power, follow these three essential steps to prevent accidents when the equipment is unattended.

1.Perform a System Check Before Shutdown

Before turning off the laser, thoroughly inspect its operational status, including:

Stable air pressure

Clean cutting lenses and laser output head (free of burns or contamination)

Proper functioning of the exhaust and smoke extraction system

Normal cutting performance

A proper shutdown ensures smooth startup and operation after a long break.

2.Drain Water to Prevent Freezing

Drain the cooling water from both the laser and the chiller to prevent freezing, which can damage internal components. If antifreeze has been used, remove it completely, as it may contain corrosive elements that can damage the system over time.

3.Clean Filters

Clean the laser surface and cabinet air filters. Also, clean the chiller’s surface and radiator filters before applying dust protection.

How to Maintain a Laser System During Long-Term Storage

1.Laser Maintenance

Clean the laser surface to remove dust and dirt.

If the laser has a cabinet air conditioner, remove the air filter, clean it with compressed air or water, dry it thoroughly, and reinstall it.

Fully drain internal water from the laser system. Disconnect external water pipes and use compressed air to purge any remaining water. This prevents freezing damage and scale buildup that could clog internal piping.

Wrap the laser system with stretch film or a dust cover for added protection.

2.Chiller Maintenance

Clean dust and dirt from the chiller’s surface and radiator filters.

Completely drain water from the chiller tank and internal piping. Use compressed air to remove any remaining water to prevent freezing damage or scale buildup.

Cover the chiller with stretch film or a dust cover for protection.

How to Restart a Stored Laser System

Remove the protective film or dust cover and reconnect power and water lines securely.

If operating in low temperatures or high humidity, use an air-conditioned room to maintain an environment of 10℃-40℃ with humidity below 70%.

Fill the chiller with the required amount of coolant. If the temperature is below 0℃, mix 20% antifreeze with 80% water. If temperatures drop below -10℃, increase the antifreeze ratio to a maximum of 30%. Switch back to regular coolant after the cold season.

Set the chiller temperature:

Low-temperature water: 25℃

High-temperature water: 28℃

These settings help prevent faults and ensure stable laser operation.

Check the laser and chiller for proper operation. When filling the system with water, air pockets may cause low water pressure or flow. If this occurs:

Loosen the water pump’s exhaust valve until a steady stream of water flows, then tighten it.

Alternatively, restart the water pump multiple times in 10-20 second intervals to clear trapped air.

By following these best practices for laser system maintenance and storage, you can prevent common issues such as freezing damage, contamination, and system failures. Proper care ensures your equipment remains in optimal condition, ready for efficient operation whenever needed.

For expert guidance on laser system maintenance or to explore Han’s Laser solutions, contact us today!