How to clean the optical fiber connector!

Fiber laser has been widely used in all walks of life, but if the fiber connector of laser is dirty, it will easily affect the stability of laser and even reduce the service life of laser.
Therefore, before using the laser fiber connector, the cleaning state and damage degree of the protective lens shall be checked. If there is any stain, professional tools shall be used and cleaned according to strict procedures to ensure that the fiber connector is clean and undamaged.

Next, we will teach you how to clean the optical fiber connector:

1、 Cleaning tools:

To clean the optical fiber connector, you need the following equipment:
(1) Powder free rubber gloves or finger covers;
(2) Lint free fiber cleaning cloth and cotton swab;
(3) Anhydrous ethanol, i.e. alcohol (optical grade, purity > 99.5%);
(4) Compressed air (oil-free, water-free), or a wooden stick rolled with the inner layer of double-sided adhesive tape;
(5) Microscope.

2、 Cleaning procedure:

Please clean and maintain the optical fiber connector in strict accordance with the following procedures:
(1) Turn off the laser switch and set the key switch to the “off” position;
(2) Remove the protective sleeve (black) of the connector, remove the window piece (also known as protective lens), and wipe the surface around the connector with an optical cleaning cloth dipped in alcohol;
(3) Put the optical fiber connector under the microscope (the magnification is 20 times), so that the quartz column of the connector can be clearly imaged under the microscope. Observe carefully, and clean the dust or small particles on the surface of the quartz column with cotton swab dipped in alcohol. After cleaning, it must be wrapped with non-woven cloth and placed on the table, and then continue other work to avoid the dust polluting the surface of the quartz column again.
(Note: clean the quartz column in a dust-free environment)
(4) Place the window piece under the microscope so that it can be clearly imaged under the microscope. Carefully observe the lens, clean the dust and small particles inside and outside the lens with cotton swab dipped in alcohol, and install it back into the connector. Finally, observe again under the microscope to confirm whether it is clean.
(5) Glue off the dust on the inner cover with double-sided adhesive stick, and then clean it with cotton swab and alcohol, and put it back on the connector.

3、 Precautions

●Please do not reuse lint free cotton or cotton swabs;
●Do not touch the protective lens of the optical fiber connector with your fingers;
●Do not blow directly with your mouth to protect the surface of the lens from dirt, which may cause new dirt;
●Do not touch the tip of the cleaning swab with your fingers;
●Please clean the protective cover and sleeve before installing them on the optical fiber connector;
●When using compressed air, do not blow dirt directly from the front, but from the side to prevent dirt from sneaking into the surface;
● If the optical fiber connector cannot be installed on the optical components immediately, please cover the tail with the protective cover cleaned by compressed air.

15 Ways to improve the service life of plasma cutting nozzle

1. Ensure the correct pressure and flow of plasma
The correct pressure and flow of plasma gas is very important for the service life of consumable parts. If the air pressure is too high, the life of the electrode will be greatly reduced. If the air pressure is too low, the life of the nozzle will be affected.

2. Adopt reasonable cutting distance
According to the requirements of the instruction manual, the reasonable cutting distance should be adopted. The cutting distance is the distance between the nozzle and the surface of the workpiece. When piercing, double the normal cutting distance or the maximum height that can be transferred by plasma arc should be adopted as far as possible.

3. Perforation thickness shall be within the allowable range of the machine system
The cutting machine can’t pierce the steel plate with working thickness, and the usual thickness of perforation is 1 / 2 of the normal cutting thickness.

4. Do not overload the nozzle

5. Keep plasma gas dry and clean

6. Cutting should start from the edge

7. Avoid the extension of plasma arc

8. Reduce unnecessary arcing time

9. Apply splash proof chemical coating on the protective shell

10. Remove the slag from the protective shell

11. Remove the gas after replacing the consumer parts

12. Keep cutting torch and consumable parts clean as far as possible

13. Remove oxides of air or oxygen from the nozzle

14. Soft water is injected into the cutting torch

15. Check air flow and cooling flow daily

How to protect laser in summer? Let’s see what I can do

When summer comes, the temperature rises and the rainfall is frequent. At the same time, we also remind you to give the laser a suitable environment to spend the continuous rainy season and hot days.

When the laser cooling water temperature is set lower than the dew point temperature, condensation is likely to occur. Condensation will damage the electrical and optical components of the laser, and even cause the component failure. In order to avoid condensation, the environmental conditions of the laser must be within a certain limit.

Environmental requirements:
1. The working temperature of the laser is 10 ℃ – 40 ℃;
2. Humidity of laser working environment: 10% – 80%;
3. Avoid condensation when the laser is working.

 

How to prevent laser condensation?
1. The ambient temperature of the independent space where the laser is placed is lower than 35 ℃;
2. The humidity of the independent space where the laser is placed is lower than 60%;
3. It is suggested that the equipment cabinet should be sealed and installed with industrial air conditioner to keep constant temperature and humidity inside the cabinet, which can effectively avoid condensation of laser;
4. If the conditions permit, a separate air-conditioned room should be built for high-power laser, which can effectively avoid condensation;
5. When the ambient temperature and humidity are too high, there will be about 30 minutes of dehumidification process when the laser is turned on, which is normal. Restart the laser after the condensation alarm is removed;
5. The cooling water temperature requirement of QBH interface of laser is relatively loose. The chiller with double temperature and double control can appropriately adjust the set water temperature higher than the dew point, but the set water temperature should not be higher than 30 ℃;
6. When the equipment is out of service, please shut down the laser and water cooler at the same time.

 

How to deal with laser condensation?
1. If the laser is found to have condensation, it should be shut down immediately;
2. Wipe the condensation water on the shell of the laser, and start the laser after the condensation phenomenon is completely eliminated;
3. Reduce the temperature and humidity of the environment to the required area.

 

Laser protection on rainy days in summer:

There are many thunderstorms in summer. In order to avoid damage to the laser in rainstorm days, please disconnect the main power supply of the laser, and cushion the electric control cabinet, laser and water cooler to prevent huge maintenance costs caused by soaking in water. For the low-lying workshop, it is necessary to arrange personnel on duty to do a good job in flood control and waterlogging prevention, so as to reduce property losses as much as possible. If the equipment is involved in water, do not power on the test blindly

Top 10 common problems and solutions of laser (3)

8、 Fault Name: maximum current alarm

Protection measures: stop the main power supply and turn off the laser.
Possible cause: the working current of single module pump exceeds the maximum limit.
terms of settlement:
(1).Restart the laser after it is turned off and check whether it is normal; If normal, normal use;
(2). If the maximum current alarm is still given, the driving MOS tube in a single module may break down, so the laser should be turned off immediately and the customer service personnel of Chuangxin should be contacted.

9、 Fault Name: water cooling plate alarm of electric module

Protection measures: stop the main power supply and turn off the laser.
Possible causes: the temperature of the water cooling plate of the laser module is too high, the temperature alarm.
terms of settlement:
Turn off the laser, and check whether the flow rate and water temperature of the water cooler are normal, and whether the water pipe is blocked. After the inspection, restart the laser and the laser returns to normal. If not, contact Chuangxin customer service staff.

10、 Fault Name: water cooling plate temperature alarm of beam combiner

Protection measures: stop the main power supply and turn off the laser;
Possible causes: the temperature of the water cooling plate of the laser beam combiner is too high, and the temperature alarm is given.
terms of settlement:
Turn off the laser, and check whether the flow rate and water temperature of the water cooler are normal, and whether the water pipe is blocked. After the inspection, restart the laser and the laser returns to normal. If not, contact Chuangxin customer service staff.

Top 10 common problems and solutions of laser (2)

4、 Fault Name: QBH installation alarm

Protection measures: stop the main power supply and turn off the laser.
Possible cause: poor contact between QBH output contact and cutting contact.
Solution: turn off the laser, check the laser QBH output head and cutting head, and re install.

5、 Fault Name: emergency stop alarm

Protection measures: stop the main power supply and turn off the laser.
Possible cause: the emergency stop switch is pressed.
Solution: the emergency stop switch returns to normal state, restart the laser.

6、 Fault Name: water flow alarm

Protection measures: stop the main power supply and turn off the laser.
Possible cause: the water cooler is abnormal, resulting in the decrease of water flow.
Solution: turn off the laser, check whether the flow rate and water temperature of the water cooler are normal, and whether the water pipe is blocked.
After the inspection, restart the laser and the laser returns to normal.

7、 Fault Name: abnormal communication alarm

Protection measures: stop the main power supply and turn off the laser.
Possible cause: there is no signal transmission between single module communication line and main module.
terms of settlement:
1. Check whether the signal line between single module and main module is loose;
2. Check whether the single module can power on and start normally, whether there is red light, and whether the auxiliary power supply voltage output works normally.

Top 10 common problems and solutions of laser (1)

1、 Fault Name: forward light PD alarm

Protection measures: stop the main power supply and turn off the laser.
Possible cause: the PD inside the laser does not detect the laser.
terms of settlement:
(1). restart the laser, do not turn on the laser, and check whether there is red light. If there is no red light, please contact Chuangxin customer service personnel;
(2). if there is red light, please check whether the relevant module can turn on the laser. Check whether the voltage output of DC switch power supply of module power supply is normal.

2、 Fault Name: Super return light alarm

Protection measures: stop the main power supply and turn off the laser.
Possible cause: the laser beam combining module detects that the return light is too strong.
terms of settlement:
(1). Check the focus position of the laser;
(2). Check whether the materials are placed horizontally;
(3). Check whether the material is ultra-high reflection material;
(4). Check whether the material thickness exceeds the standard, and give an alarm if it cannot be cut through;
(5). Turn off the laser, suspend use for 3-5 minutes, restart the laser and turn on the laser.

3、 Fault Name: pump source temperature alarm

Protection measures: stop the main power supply and turn off the laser.
Possible causes: the pump source temperature of the laser module is too high, and the temperature alarm.
terms of settlement:
Turn off the laser, and check whether the flow rate and water temperature of the water cooler are normal, and whether the water pipe is blocked.
After the inspection, restart the laser and the laser returns to normal. If not, contact Chuangxin customer service staff.