How to find the focal length of the fiber laser welding machine

Fiber laser welding machineis becoming more and more popular in various fields. Because its price is getting lower and lower. And it is easy to operate. However, there are still some people who have no experience in laser machines. They may face a lot of small problems or issues, especially focusing on the focus. Many people don't know how to find the focus.

Why find the focus of fiber laser welding machine?

The working size of the fiber laser welding machine is adjusted by the lens. The F-胃 lens is a convex lens, like a magnifying glass. We know that it has a focal length from lens to lens. At this length, all the light power is concentrated on one point, and the power is high. The fiber laser welding machine uses this theory to focus all the lasers on one point. The laser will leave marks at high temperatures.

Therefore, the laser welding machine can only work properly when the machine is in the correct focus. Because of this, before using the laser, we need to find the correct focus.

How to find the focus of the fiber laser welding machine?

There are three methods that can help us find the correct focus.

First, we need to find the focus manually. Place a small piece of metal in the work area and select the "Continue" button. Next, we need to adjust the laser welding joint up and down and check the laser. If there is a strong laser effect on the metal surface, it is the focus. This is the most common method and easy to learn.

Measure the length. Lenses for different working sizes have special focal lengths. We can measure the length of F-胃 from the lens to the workpiece. There are some problems with this method because there may be some errors in the measurement. After finding the focus by this method, we still need to do some fine-tuning.

Outside red pointer. We installed an extra red pointer under the laser welding head. When the machine is turned on, there are two points. When the two points overlap, it is the correct focus. Now we install it on all our machines. It can save users a lot of time.