Laser Marking Parameters Guide: Power, Speed, Frequency, and Lens Settings
Correct parameter settings are critically important for achieving high quality, readability, and production efficiency in laser marking processes. Parameters such as laser power, scanning speed, frequency, hatch spacing, and lens selection directly affect marking quality. This technical guide explains in detail the basic parameters used in industrial laser marking systems and the effects of these parameters on marking performance.
Basic Principles of Laser Marking Parameters
Laser power
Laser power refers to the amount of energy transferred by the laser beam to the surface. High power levels can create deeper engraving and stronger contrast.
Scanning speed
Scanning speed determines how fast the laser beam moves across the surface. At lower speeds, the laser stays on the surface longer and creates a more intense effect.
Frequency (Pulse frequency)
Frequency refers to the number of laser pulses per second. Frequency settings can affect the roughness and contrast of the marked surface.
Hatch spacing
Hatch spacing determines the distance between laser lines. Smaller hatch spacing provides denser marking.
Pass count
The laser can pass over the same surface multiple times. This method is especially used in deep engraving applications.
Focal distance
The focal point of the laser beam must be adjusted correctly to the surface. Proper focusing increases energy density.
Lens selection
Different lenses provide different marking areas. A smaller focal point means higher energy density.
Energy density
Energy density is determined by the combination of laser power and focal size.
Material properties
Different materials absorb laser energy in different ways. Therefore, parameters vary depending on the material.
Parameter optimization
The best marking quality is usually determined through test studies.
Laser Parameter Settings in Industrial Applications
Metal surface marking
Fiber laser systems provide high performance on metals such as stainless steel and aluminum.
Plastic surface marking
On plastic materials, parameters should be adjusted to create a lower heat effect.
DataMatrix marking
In 2D code marking processes, high contrast and correct cell size are important.
QR code marking
QR code marking requires smooth edges and good contrast.
Deep engraving
In deep engraving applications, low speed and high power are preferred.
Surface contrast marking
For contrast marking, high speed and low power are generally used.
Inline production
In mass production lines, parameters must be suitable for the production speed.
Camera verification
After marking, the readability of codes can be checked with camera systems.
Automation integration
Modern laser systems can work integrated with PLC and MES systems.
Choosing the right parameters
Material type, laser power, and production requirements should be evaluated together.
How is laser power adjusted?
It is determined according to the material type and marking depth.
Why is scanning speed important?
It affects the energy density created on the surface.
What is the purpose of frequency setting?
It determines the density of laser pulses.
How is hatch spacing selected?
It is adjusted according to the marking density.
Is lens selection important?
Yes, it determines the marking area and energy density.
Are the parameters the same for every material?
No, each material requires different parameters.
What settings are required for deep engraving?
Low speed and high power are preferred.
How is contrast marking done?
It is done with the correct frequency and power settings.
Do parameters change in inline production?
Yes, they are optimized according to the production speed.
Are sample tests necessary?
Yes, they are recommended to determine the best parameters.
