Beam suddenly stopped output during working

Phenomenon: The lasers suddenly stopped emitting beam after working for a period of time, but it returned to normal if restarted.

1 Laser overheats protection (Air- cooled laser sources)

Due to the ambient temperature is too high, the lasers have been working under the condition of near-full duty cycle for a long time, under poor cooling conditions, and excessive dust on-site that cause dust accumulation on the lasers fan and heat sink, or chassis enclosure with poor air circulation, all these factors could degrade the cooling effect of the lasers, resulting in higher temperature, therefore triggering the laser’s overheat protection program.

Picture 1: A laser source which dust covers the heat sink

2 Power supply issue

It may due to unstable voltage. It is recommended to check the stability of the 220V AC input and 48V DC output of the laser power supply. A multi-meter can be used to measure the voltage changes of input and output while the lasers has encountered an abnormal situation. Either replace the 220V AC power supply cable or replace the power supply to test if the abnormality still occurs.

3 The chiller(Water-cooled laser sources)

1. Insufficient cooling capacity.

2. The water pipe is too long. Try to shorten it, generally not exceeding 2m.

3. The water pressure is too low and is not within the required range.

4 Cooling water(Water-cooled laser sources）

1. The cooling water level in the chiller is below the standard line;

2. The cooling water is not deionized or distilled, cause accumulation of scale inside the water-cooled laser source, which reduces the water flow rate and cooling effect, and in severe cases, may cause the water-cooled laser source to rupture.