Common Faults and Solutions In Laser Cutting

It is inevitable that the laser cutting equipment will break down during use. The following points are our summary of common failures and solutions of laser cutting equipment.

I, No laser during work

1. First, check whether the laser tube itself emits light (test at the light outlet);
2. Check whether the water circulation is normal (see whether the water flow in the water pipe is smooth), if there is no water flow or the water flow is not smooth;
3. The water circulation is normal, check whether the power supply fan is rotating, if not;
4. Press the laser power test button, if there is no light;
5. If there is light in the test;
6. If the water protection signal line is short-circuited, there is still no light.

Solutions

1. Check whether the lens is damaged and whether the optical path is offset;
2. Clean the water pump and straighten out the water pipes;
3. If the laser power supply is broken, replace the laser power supply;
4. One of the laser power supply or laser tube is faulty;
5. If the water protector is broken, replace it;
6. If the control card or wiring board is faulty, replace it.

II, There is no action when starting up

1. Check whether the fluorescent tube of the equipment is displayed or bright, if not;
2. If the light is on, check the software setting parameters for the new model, if the parameters are wrong;
3. The parameters are correct, but there is still no action.

Solutions

1.  Check the power supply system or main power fuse;
2. Write the correct parameters;
3. The control card or driver is faulty.

III, The machine sometimes has light and sometimes has no light

1. Check whether the lens is too dirty or damaged, and whether the optical path is seriously shifted;
2. The optical path of the lens is normal, check whether the water cycle is normal, if the water is intermittent;
3. The water cycle is normal, which may be a water protection failure;
4. If the problem persists, the control card, laser light source, and laser tube may all cause this phenomenon.

Approach

1. Clean or replace the lens, adjust the optical path;
2. Clean or replace the water pump and dredge the water pipe;
3. Replace the water protection;
4. Alternately replace the above accessories to find out the reason.

IV,  The engraving becomes lighter

1. Check the working current, speed, and water temperature. If the speed is too fast, the current is too small, and the water temperature is too high;
2. Check whether the cutting depth is normal, if normal;
3. The cutting is still very shallow, or sometimes deep and sometimes shallow;
4. Look at the ammeter, if it can reach 20mA, but the depth is not enough.

Solutions

1. Increase the current, reduce the speed, and replace the circulating water;
2. Increase graphics resolution;
3. Whether the lens is dirty or damaged, and whether the optical path is offset;
4. The laser tube is aging, replace the laser tube.

V,  The machine stops halfway, misses engraving, and indiscriminately engraves

1. Check the grounding status of the machine, and measure whether the ground wire is up to standard (the resistance to ground should not be greater than 5 ohms);
2. Check whether the computer has a screen saver or power saving mode (such as system hibernation or turning off the hard disk) for low-speed and high-speed motherboards;
3. Check whether there is any error in the original graphics, such as graphics with intersections, unclosed, missing strokes, etc.;
4. There is no such problem when making other graphics, but only a certain graphic has such a problem;
5. The problem still exists.

Solutions

1. Transform the ground wire to meet the relevant standards;
2.  Cancel the above settings and change to "never";
3. Correct the errors in the graphics;
4. There is an error in the processing of the new data in the picture, and the effect picture should be re-made;
5. It may be a problem with the serial port of the computer or the control card of the engraving machine.

VI, The size of the graphics output is wrong

1. Check whether the pulse equivalent in the machine settings is set correctly.

Solution

1. Input and set the correct pulse equivalent.

VII, the machine reset is not normal

1. The direction is correct when resetting, but the laser head and the beam cannot stop when it reaches the fixed point (check the software parameters first for the new machine, if it is correct);
2. The crossbeam resets normally, but the laser head does not reset. It may be that the tension wheel is stuck or the motor shaft is broken, and the parameters are wrong;
3. When the GN machine is reset, the trolley moves in the opposite direction to the beam and hits the side end;
4. When the GN model does not reset, pay attention to whether the 68-core data cable and the adapter board have poor contact or open circuit.

Solutions

1. The control card and the limit sensor are faulty, replace them;
2. Replace the tensioning wheel or small motor, and modify the parameters;
3. If the software parameters are wrong, stop the machine to correct the software parameters;
4. Re-insert or replace the data cable and adapter board.

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Contact us at sales3@openex.com.cn or call us at +86 186 5928 0806 to learn how we can help.