CO2 laser technology upgrades! KeyGree standard marking machine achieves "zero error" processing, reducing costs by 30%

As an important processing method in modern manufacturing, laser marking technology has been widely used in product identification, traceability and anti-counterfeiting. Among various laser marking technologies, CO2 laser marking occupies an important position due to its excellent adaptability to non-metallic materials. The KeyGree standard CO2 laser marking machine integrates advanced RF excitation technology, precision optical system and intelligent control platform, becoming one of the mainstream equipment in current INDUSTRIAL marking field.

Traditional mechanical marking methods have problems such as tool wear and inconsistent marking quality, while early CO2 laser equipment faced challenges of large size, high energy consumption and complex maintenance. The KeyGree standard CO2 laser marking machine solves these problems through multiple technological innovations, achieving unity of high efficiency and quality in industrial production. This paper will comprehensively analyze the equipment from technical principles, system composition, performance tests and application cases.

1.Technical Principles and System Composition

1.1 CO2 Laser Generation Principle

The KeyGree standard CO2 laser marking machine uses RF excitation to generate laser. In a metal cavity filled with CO2, N2 and He mixed gas, the 13.56MHz RF electric field excites gas molecules, causing CO2 molecules to transition from ground state to excited state and generate 10.6μm wavelength laser. Compared with traditional DC excitation, RF excitation has advantages of high efficiency (electro-optical conversion efficiency ≥15%), long life (≥30，000 hours) and good beam quality (M²<1.2).

1.2 Optical System Design

The optical system mainly consists of laser generator, beam expander, galvanometer scanning system and focusing lens (as shown in Figure 1). The laser beam is expanded by 3 times, then deflected two-dimensionally by high-speed galvanometer (scanning speed ≥7000mm/s), and finally focused on workpiece surface by f=160mm focusing lens. The optical system adopts fully enclosed design to effectively prevent dust pollution, and is equipped with red light indicator (650nm wavelength) for marking position preview.

1.3 Control System Architecture

The control system is developed based on industrial PC platform, mainly including:

• Main control module: Intel Core i5 processor, Windows OS

• Motion control card: Supports USB3.0 interface, control accuracy 0.001mm

• HMI: 10.1-inch touch screen, supports AutoCAD, CorelDRAW file import

• Safety protection: Emergency stop button, light curtain protection and laser interlock device

1.4 Cooling System

Adopts dual-cycle refrigeration system:

1. Primary cooling: Deionized water circulation, temperature control accuracy ±0.5℃

2. Secondary cooling: Air cooling system
   The cooling system ensures continuous operation for over 8 hours at 25℃ ambient temperature.

2. Performance Tests and Analysis

2.1 Marking Accuracy Test

Using standard grid plate (accuracy 0.001mm) for testing, results as Table 1:

Test Item	Requirement	Actual Result
Positioning accuracy	±0.01mm	±0.008mm
Repeat accuracy	±0.005mm	±0.003mm
Minimum line width	0.05mm	0.03mm

2.2 Marking Effects on Different Materials

Testing common non-metallic materials (laser power 60W, speed 3000mm/s):

1. ABS plastic: Clear marking, no carbonization at edges

2. Acrylic: Depth 0.2mm, smooth sidewalls

3. Wood: High contrast, no scorching

4. Glass: Uniform micro-cracks on surface, no strength reduction

2.3 Production Efficiency Test

Marking 10×10mm² QR code:

• Single piece time: 0.8s

• Continuous 8-hour operation failure rate: 0%

3. Industrial Application Cases

3.1 Electronic Component Marking

Used for PCB serial number marking in a circuit board manufacturer (as shown in Figure 2). Compared with traditional inkjet:

• Yield increased by 12%

• Maintenance cost reduced by 60%

• Permanent indelible marking

3.2 Medical Device Identification

Applied to surgical instrument marking, meeting ISO 13485 traceability requirements. Marking depth 0.05-0.1mm, without affecting sterilization and use.

3.3 Food Packaging Date Printing

Marking production dates on PE packaging film at 500 pieces/minute, with no solvent contamination risk.

The KeyGree standard CO2 laser marking machine achieves high-quality marking on non-metallic materials through optimized optical design, stable RF excitation source and intelligent control system. Experiments prove that the equipment features high marking accuracy, stable operation and strong adaptability, meeting precision marking requirements in electronics, medical, packaging and other industries. In the future, integrating machine vision positioning and industrial IoT technology will further improve the equipment's intelligence level.