Keyence Laser Marking Code Can Hold

This allows the laser to irradiate parts with ideal strength and high energy density over short time.

Keyence Laser Marking Code Can Hold

A 2D code can hold tens to hundreds of times the information of a barcode.

This high information density allows a 2D code to hold the same amount of information as a barcode in as little as 130 the size.

These advantageous characteristics have led to expanding applications in various fields.

In recent years, detailed traceability is demanded not only for finished products but also for individual parts.

Consequently, high quality marking to ensure stable 2D code reading is required.

This allows for flexibility to keep pace with increasingly strict quality control.

You can quickly check the history by simply reading the code.

The code is read in later processes to provide work instructions to robots.

There are some standards for 2D code reading that can be used as a guide.

This standard specifies the following criteria for the evaluation of reading grades.

The result is expressed as a letter grade from A to D or F, where A is the highest grade (reading stability).

Preventing these values from decreasing is the goal to ensure readable marking.

A laser maker produces different colours by changing marking conditions between white marking and black marking.

Applying heat without engraving the target forms an oxide film on the surface.

The metal surface is slightly removed to expose an uneven surface.

This cause irregular reflection of light to create marking that appears white.

The key is use of white marking with proper focus and black marking with blurred focus.

The variable beam spot sizes of the 3D marking function are an effective approach.

When the focus deviates, the quality of marking degrades and this also affects 2D code reading.

Although the allowable depth of focus varies depending on the laser oscillation method, it is necessary to prevent the focus from deviating by maintaining a constant focal distance between the target and laser marker or using a displacement sensor.

A YVO 4 laser produces a laser with a high peak power and a short pulse.