Dynamic Focusing for Curved Surfaces

It has proposed a dynamic focusing solution to the problem of focal length deviation when marking curved parts. It combines curved surface marking technology and intelligent focusing systems to solve the problem of blurred markings and insufficient precision in traditional laser marking caused by the curvature of the surface. This improves the efficiency and quality of processing complex parts.

Why is dynamic focusing needed for marking curved surfaces?

Many of our customers have encountered this problem when engraving on curved surfaces: the parameters are set right, but the engraved image is still blurry or uneven.In fact, the problem is mostly one of focus. When traditional laser equipment with a fixed focal length encounters a curved or uneven surface, the focal point is easily thrown off, just like using a camera to take a picture of a moving object without getting the focus right, and the results are naturally much worse.In this situation, dynamic focusing technology became the key to breaking the deadlock.

The core principle of the dynamic focusing system.

They can be tested for curvature in real time.

A dynamic focusing system first scans the surface of the workpiece with a high-precision sensor, quickly generating 3D contour data.For instance, when a logo is stamped on a curved car part, the system can automatically identify the difference between the highest and lowest points, much faster than a human can measure it.

Intelligent focal adjustment.

According to the data on the curved surface, the system can control the Z-axis motor or the galvanometer in real time, so that the laser beam always "sticks" to the surface of the workpiece.Imagine that the laser head has an autopilot function, so that no matter how the workpiece moves, the focal point can keep up with it.

Closed-loop feedback ensures precision.

The system also constantly monitors the marking effect during the focusing process. If it finds that energy is insufficient or excessive in a particular area, it will automatically compensate for it.This design of labeling and optimizing at the same time is particularly suitable for the medical device industry, which requires extreme precision.

The practical skills involved in using it.

Select the right parameters according to the material.

For example, stainless steel requires a higher frequency to focus the beam, while plastics, which melt easily, require a lower frequency.

Surface cleanliness.

When a customer complained that the device was not properly focusing, it turned out that there was some oil on the surface of the object which was interfering with the sensor's readings.Wiping the surface with alcohol before processing can save 80 % of the trouble of adjusting later on.

Calibrate sensors regularly.

The dynamic focusing system is like a precision instrument, and we recommend that it be completely re-aligned once every three months.When there is a lot of dust in the workshop, the sensor lens easily gathers dust, and a cotton swab dipped in a special cleaning solution can be used to gently wipe it clean and restore its sensitivity.

How to avoid pitfalls when choosing equipment.

Don ’ t just look at the manufacturer ’ s claims of “ 0.01 mm accuracy, ” the key thing is to test the actual sample. It is suggested that you bring a typical piece of your own work to the site to test the machine, and focus particularly on the consistency of marking in curved areas and at corners.In addition, if you can choose a brand that supports software-defined focusing curves, it will be easier to adapt to different workpieces in the future.