Frequent rainfall and humid environment in summer can easily cause condensation inside the laser, which reduces the performance of the laser or even damages it. Learn more about metal laser cutting machine maintenance:https://www.haojicnc.com/

1. Fiber laser generator maintenance in Summer
Frequent rainfall and humid environment in summer can easily cause condensation
inside the laser, which reduces the performance of the laser or even damages it.。
Environment required for running
Place the environment Flat, no vibration and shock
Ambient temperature
10℃-40℃
Raletive humidity
＜70%
Attentions:
If the cooling temperature is lower than the "dew point temperature" of the
environment, it will cause condensation, which will seriously damage the laser and
output head.
Define condensation:
Place the object under a certain temperature, humidity and pressure environment,
and gradually reduce the temperature of the object. When the temperature around
the object drops below the "dew point temperature" of the environment, the
moisture in the air gradually reaches a saturated state until water precipitates on
the surface of the object. Dew, this phenomenon is condensation.
Define dew point temperature:
From an application point of view, the temperature at which "condensation dew"
can be deposited from the air around the working environment is the dew point
temperature.
Avoid condensation inside and outside the laser without air conditioning:
If you use a laser that does not come with air conditioning and is exposed to the
working environment, once the cooling temperature is lower than the dew point
temperature of the laser's internal environment, moisture will be deposited on the
electrical and optical modules. In this case, no measures are taken. The outer
surface of the laser Condensation will begin to follow. Therefore, once you see
condensation on the laser shell, it means that the internal environment has
condensed. You must stop working immediately and immediately improve the laser
working environment.

2. Solution：Configure an independent air-conditioned room forthe laser
Cooling water（25℃）
Moisture outlet
Condensation inside and outside the laser without air conditioning:
Following dew point side
Cooling water（25℃）
Moisture outlet
Laser requirements for cooling water:
The laser cooling water temperature must be set above the dew point temperature
of the most severe operating environment.
Avoid condensation inside and outside the laser with its own air conditioner
Throwing the laser with its own air conditioner may cause condensation in the
internal environment
When using a laser with its own air conditioner and exposed to the working
environment, the cooling and dehumidification effect of the air conditioner will
greatly reduce the dew point temperature of the environment inside the laser.
Generally, the refrigeration temperature of the industrial air conditioner is set to be
the same as the cooling water temperature.
When the ambient temperature is lower than 38℃
Environment inside the laser
condensation
Corn module
Environment inside the laser
Dew point side
Corn module

3. When the ambient temperature is higher than 38℃
The cooling capacity of industrial air conditioners is not enough to maintain the
safety of the laser's internal environment, and condensation in the internal
environment will still occur. Over time, the external environment will also follow
the condensation. Therefore, there should be no obvious heat source around the
laser, and the hot air outlet of the water cooler should not face the laser.
Condensation in the environment of the laser with air conditioning
laser generator external environment
condensation side
Temperature exchange
Water cooling（25℃）
Moisture outlet
Condensation in the internal and external environment of the laser
with air-conditioning
laser generator external environment
condensation side
Violent temperature
exchange
Industrial air
conditioning
Laser power
generatorinternal
environment
Adequate
cooling
capacity
Safety
environ-
ment
Corn module
Corn module
Industrial
air-conditioning
laser generator internal
environment
Not enough
cooling
capacity
Condens
ation
tempera
ture

4. Water cooling（25℃）
Moisture temperature
In order to eliminate the risk of condensation in the environment of the laser, it is
recommended to configure an independent air-conditioned room for the laser
Avoid condensation inside the processing head
The processing is abnormal when the season changes or the temperature changes
greatly on the day. You can check whether there is environmental condensation in
the processing head.
Normal temperature cooling
Cryogenic auxiliary gas
Corn module
Corn module
H
B
Q
.
S
C
Q
Condensation
side
cooling
Protective
lens
Focus lens

5. Attention items:
Condensation can cause serious damage to the opticallens!
The cooling temperature is lower than the ambient dew point temperature, which
will cause condensation on the inner wall of the processing head and the optical
lens.
Using auxiliary gas below the ambient dew point temperature will cause rapid dew
condensation on the optical lens.
Instructions：
It is recommended to add an evaporator between the gas source and the
processing head to keep the gas temperature close to the ambient temperature to
reduce the risk of condensation.
Use the dew point temperature lookup table:
The cooling water temperature has a direct impact on the photoelectric conversion
efficiency, stability and condensation. In addition, the quality of the cooling water
will deteriorate over time, and there may be many impurities or microorganisms
inside. In some extreme cases, it may cause internal corrosion of the light output
terminal, which may cause light failure. Therefore, it is necessary to clean the water
tank and change the water regularly. Raycus recommends that customers replace
the cooling water and clean the water tank every 3-6 months. Normally, the cooling
water temperature is set as follows:
The water temperature of pure water (also called low temperature water, used to
cool the laser module) should generally be set at about 21°C, and it can be
adjusted appropriately between 20-25°C according to the situation. The water
temperature settings of different types of lasers are different. Please consult
Raycus laser professionals for adjustment of this adjustment value.
Deionized DI water (also called high temperature water, used to cool optical parts)
The water temperature of the water circuit should be set between 26℃ and 27℃.
This temperature should be adjusted according to the ambient temperature and
humidity. Generally speaking, the higher the ambient temperature Higher, the
higher the temperature, the DI water temperature should increase accordingly. The
basic principle is: DI water temperature should be above condensation.
The dew point table is as follows：
The left side of the table is the current working environment temperature, and the
top side is the current working environment humidity. The intersection
temperature of the temperature and humidity parameters is the "dew point
temperature" in this environment. That is to say, any object in this environment
that is below the dew point temperature will have condensation on its surface.

6. Room
temperature
Dew point humidity under different humidity
20% 30% 40% 50% 60% 70% 80% 90%
11. 1. 4. 6. 8. 10.
12. 2. 5. 7. 9. 11.
13. 3. 6. 8. 10. 12.
14. 1. 4. 7. 9. 11. 13.
15. 2. 5. 8. 10. 12. 14.
16. 3. 6. 9. 11. 13. 15.
17. 4. 7. 10. 12. 14. 16.
18. 5. 8. 11. 13. 15. 17.
19. 1. 6. 9. 12. 14. 16. 18.
20. 2. 7. 10. 13. 15. 17. 19.
21. 3. 8. 11. 14. 16. 18. 20.
22. 4. 9. 12. 15. 17. 19. 21.
23. 5. 10. 13. 16. 18. 20. 22.
24. 6. 11. 14. 17. 19. 21. 23.
25. 1. 7. 12. 15. 18. 20. 22. 24.
26. 2. 8. 13. 16. 19. 21. 23. 25.
27. 3. 9. 14. 17. 20. 22. 24. 26.
28. 4. 10. 15. 18. 21. 23. 25. 27.
29. 5. 11. 16. 19. 22. 24. 26. 28.
30. 6. 12. 17. 20. 23. 25. 27. 29.
31. 7. 13. 18. 21. 24. 26. 28. 30.
32. 8. 14. 19. 22. 25. 27. 29. 31.
33. 9. 15. 20. 23. 26. 28. 30. 32.
34. 10. 16. 21. 24. 27. 29. 31. 33.
35. 11. 17. 22. 25. 28. 30. 32. 34.
36. 12. 18. 23. 26. 29. 31. 33. 35.
37. 13. 19. 24. 27. 30. 32. 34. 36.
38. 14. 20. 25. 28. 31. 33. 35. 37.
39. 15. 21. 26. 29. 32. 34. 36. 38.
40. 16. 22. 27. 30. 33. 35. 37. 39.
41. 17. 23. 28. 31. 34. 36. 38. 40.
42. 18. 24. 29. 32. 35. 37. 39. 41.
43. 19. 25. 30. 33. 36. 38. 40. 42.
44. 20. 26. 31. 34. 37. 39. 41. 43.
Summer is the season for high incidence of laser failure. The statistical results show
that most of the laser failures are closely related to the user's operating sequence
and the equipment operating environment. When the ambient temperature in
summer is higher than 25 degrees Celsius, please remind the customer to follow
the instructions

7. Turn on and off in the next order
Turn on orders：
Turn on the main power of the laser and the key switch (the laser does not emit
light), so that the air conditioner starts to work and cools down. When the internal
temperature of the laser drops to about 25 degrees Celsius (about half an hour),
then turn on the water cooler and start the laser to emit light.
Turn off orders：
Please turn off the water cooler first, then turn off the laser switch
（Avoid the situation where the laser has been turned off and the water cooler is
still running）