12 Precautions for Proper Use of a Laser Engraving Machine

A laser engraving machine, also referred to as a laser marking machine, requires careful use and maintenance to ensure stable performance and extended lifespan. Below are 12 important precautions:

1. Proper Grounding of the Laser Engraving Machine
   The laser power supply and machine bed must have effective grounding protection, with a dedicated ground wire of less than 4Ω resistance. Proper grounding ensures:

• (1) Normal operation of the laser power supply.

• (2) Extended lifespan of the laser tube.

• (3) Prevention of external interference that may cause machine instability.

• (4) Protection against accidental high-voltage discharge damaging circuits.

2. Smooth Cooling Water Flow
   Whether using tap water or a circulation water pump, ensure smooth water flow. Cooling water dissipates the heat generated by the laser tube. Higher water temperatures result in lower laser output power (optimal water temperature: 15–20°C). A lack of water flow can cause overheating, leading to laser tube damage or even power supply failure. Regularly check for blockages, kinks, or disconnections in the water system and address issues promptly to avoid reduced power or equipment damage.

3. Cleaning and Maintenance with Good Ventilation
   Regular cleaning and proper ventilation are crucial for the machine’s normal operation. Just as stiff joints hinder human movement, dirty machine rails affect precision. After each task, clean and lubricate the machine's rails, and periodically oil the bearings. This ensures smooth operation, accurate processing, and extended machine lifespan.

4. Environment Temperature and Humidity
   The operating temperature should range between 5–35°C. Special precautions are needed in freezing conditions:

• (1) Prevent cooling water from freezing by draining it after use.

• (2) Preheat the laser power supply for at least 5 minutes before use. In damp or rainy weather, extend the preheating time to ensure proper dehumidification before applying high voltage to avoid circuit damage.

5. Correct Use of the "Laser High Voltage" Button
   When the “Laser High Voltage” button is on, the laser power supply is in standby mode, which may result in unintended laser discharge during manual operations or software errors, causing potential harm. Always turn off the “Laser High Voltage” button after each task if not processing continuously. Additionally, never leave the machine unattended during operation. For continuous work, limit sessions to less than 5 hours, with 30-minute breaks in between.

6. Keep Away from High Power and Vibrating Equipment
   Sudden electrical surges from high-power equipment (e.g., large welding machines, industrial mixers, transformers) may interfere with the machine. Similarly, avoid placing the machine near vibrating equipment (e.g., forging machines, vehicles passing close by), as vibrations can negatively affect engraving precision.

7. Lightning Protection
   Reliable building lightning protection systems are usually sufficient. Effective grounding also contributes to lightning protection. In areas with unstable power (voltage fluctuations exceeding ±5%), consider installing a voltage stabilizer of at least 3000W to prevent damage to the machine’s circuits or computer.

8. Maintaining Stability of the Control PC
   The control PC is dedicated to managing the engraving machine. Avoid installing unnecessary software. Network cards or antivirus programs may slow the PC. If network communication is necessary, disable the network card before operating the machine.

9. Rail Maintenance
   Dust and debris generated during processing can accumulate on the rails, affecting movement.

• Maintenance: Use a cloth to remove dust and old lubricant from the rails, then apply a new layer of lubricant.

• Frequency: About once a week.

10. Fan Maintenance
    Dust accumulation in the fan and exhaust ducts reduces ventilation efficiency, trapping smoke and debris.

• Maintenance: Loosen the clamps connecting the exhaust duct to the fan, remove the duct, and clean out the dust.

• Frequency: About once a month.

11. Tightening Screws
    Over time, screws in the motion system may loosen, affecting the machine’s stability.

• Maintenance: Use the provided tools to tighten all screws.

• Frequency: About once a month.

12. Lens Maintenance
    Over time, dust may accumulate on the surface of the lenses, reducing their reflection and transmission efficiency, ultimately affecting laser output.

• Maintenance: Use ethanol-dipped lint-free cotton to gently clean the lens in a clockwise motion.

• Frequency: As needed.

In summary, adhering to these precautions regularly will significantly enhance the lifespan and efficiency of your laser engraving machine.