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How to Do When the Laser Tube Does Not Give out Light When the Laser Cutting Machine Starts up?

Oct. 10, 2020

The laser tube of the laser cutting machine does not emit light, usually, there are three types:

1. Suddenly no light,

2. The laser light gradually weakens during use,

3. No warning the next day boot laser tube out of the light.

Laser Cutting Machine

Regarding the above situation, the laser cutting machine is turned on but the laser tube does not emit light. The specific reasons are detailed below:  

1. Regarding the reason for not emitting light 

Check the water circulation of the laser cutting machine to see if there is water from the nozzle of the pipe. If the water outlet pipe is normal, then ask the customer how long it took from starting up to now. If the customer says it took one morning or more than two hours, then check whether the outermost layer of the laser tube There is water, if there is water, it is because the water temperature is too high and the laser tube is blown out.

If there is no water in the outer layer of the laser tube, check the laser power supply at this time. There is a red button on the laser power supply. Press it to see if the light is emitted. If it emits light, it may be a water protection device failure. At this time, you need to check the water. Protect whether the water outlet is blocked, and then clean the water protection, it is best to rinse with water. At this time, pay attention to the water inlet and outlet of water protection. Never reverse it, otherwise, the laser tube will be damaged.

The second method is to short-circuit the PG on the laser power supply (connect it with a wire) but at this time pay attention to check the water circulation, the water protection does not work, and the laser tube will still be damaged. If the light still does not come out, it means that the laser power supply is broken, and you can find the manufacturer to replace it.

2. About the reason why the light using the laser tube is getting weaker and weaker 

First of all, the circulation of the water chiller. If the circulation is not normal, turn off the power and check whether the water pump or chiller plug is plugged in.

Secondly, check whether the ammeter of the laser cutting machine is normal. If it is normal, it may be a problem with the laser tube. Find the manufacturer to replace or repair it. If the ammeter is not normal, it is a problem with the laser power supply. Find the manufacturer to replace or repair it. 

3. Start to use, everything is normal, after the next day turn on the laser tube does not light

First, check the water circulation of the laser cutting machine to see if the water is flowing normally. 

Secondly, check the ammeter of the laser cutting machine and press "out the light" to see if the ammeter pointer is up. If it is below 5 mA, it means that the power supply is broken. Find the manufacturer to replace or repair it. 

Finally, if the ammeter does not move, check whether our laser switch is turned on, if it is turned on, check whether the laser power indicator light is on, and when it’s on, press the absolute button on the laser power supply to check the current hand pointer. If the pointer is moving and If it is less than 5 mA, the laser power supply is broken, or the maximum light intensity and minimum light in the software are emphasized to 50%, and then press to see if the ammeter pointer reaches 10-12 mA if it does not reach the laser power supply or It is a problem with the motherboard.

The above information is provided by laser cutting machine factory.