The light appear strong at first, and then become weaken or light is going to become weaken gradually, which results in it is unable to fuse or sparks generated at the copper nozzle.

The analysis of causes:

Usually it is that the welding gun lenses to be damaged, including but not limited to protective mirrors, focusing, collimation and reflection. Any one or more of these damages can cause this to happen.

Replace the protective lens and look at the focus at first, and then check the reflection and collimation. And in the end to replace the damaged lens.

Also check the laser fiber tip for whether it is dirty or be damaged or not.

Analysis of lens damage:

1. Classification of damage: the abnormal of motor swing caused by interference, or the red light is too biased to be adjusted. And the sealing ring will burn out together commonly in this situation.

2. Convex damage to the lens: it is generally common to be seen in pollution, such as unprotected when replacing, and the form is a punctate black spot.

3. Damage to the plane of the lens: due to laser diffuse reflection, most of them are caused by reflection, forming a focal point on the lens, and burning out the coating. In this situation, the form is white spots. Convex surfaces also have this form, and the formation principle is consistent with it.

Trouble solutions:

Replace the damaged lens, please check the replacement plan in the structural installation

How to avoid it in the later time:

In handheld welding, the highest replacement frequency is related to the lens. As to the cause of damage, please take the following precautions.

1. Use original lenses

2. Pay attention to prevent from pollution when in the replacing process.

3. Do not weld vertically as much as possible, especially when in the process of welding highly reflective materials.

4. Damages of Protective lens:precautions

5. Replace the damaged protective glasses in time.