Troubleshoot the weak and unstable laser of the laser marking machine

The reasons for the weak laser of the laser marking machine include: unstable power supply, pollution of the optical mirror, power attenuation caused by long use time, and optical path and setting problems; laser The causes of instability also include: unstable power supply, signal interference, and high temperature of the laser.

1. Laser marking machine failure phenomenon: weak laser

1. Check the working current: check whether the power supply is stable , Whether the current reaches the rated working current.

2. Check the optical mirror surface: check whether the output mirror surface of the collimator is contaminated, if it is contaminated, wipe it lightly with absolute ethanol in front of it, being careful not to scratch the mirror coating . Check whether other optical lenses are contaminated, such as red light beam combiner, galvanometer, and field lens.

3. Check the power attenuation: The power attenuation after the laser has been used for 20,000 hours is a normal power loss.

4. Check for signal interference: there is a disconnection during the marking process, which is usually caused by signal interference. For this reason, the weak current and strong current leads cannot be bundled together or run on the same side , The signal wire adopts a signal wire with shielding function; besides, the ground of the power supply is not in good contact.

5. Troubleshooting interface parameters: Check whether the pulse width frequency has been set within the required range.

6. Troubleshoot light path problems: confirm whether the isolator's light spot is normal (the light spot is round and there is no dark spot). Check whether the output light of the laser is blocked (make sure that the output end of the isolator and the galvanometer port are on the same horizontal line when installing).

Two, laser marking machine failure phenomenon: laser is unstable

1. Check the power supply: Check whether the power supply is stable and whether the current reaches the rated operating current.

2. Check for signal interference: there is a disconnection during the marking process, which is usually caused by signal interference. For this reason, the weak current and strong current leads cannot be bundled together or run on the same side , The signal wire adopts a signal wire with shielding function; besides, the ground of the power supply is not in good contact. Check whether the 25-pin signal cable is an anti-interference cable and the ports are in good contact.

3. Check the temperature of the laser: Whether the temperature of the laser casing is too high, and the temperature is close to the critical temperature (refer to the ambient temperature of 45~47℃), the light will be unstable. If the temperature of the isolator shell is too high and the temperature is close to the critical temperature (reference ambient temperature 45~47℃), the light will be unstable.

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