Solution Overview

Keyboards, a staple in both professional and personal environments, require precise and durable marking for each keycap. Utilizing machine vision to guide laser positioning for character marking ensures that each symbol on a keyboard is accurately placed, visually appealing, and consistent across all keys. The resulting marks are not only high-quality but also offer benefits such as rapid processing speeds, low production costs, and enhanced security through anti-counterfeit measures.

Project Requirements

This solution meets the following specific requirements:

1.Accurate keycap positioning for character marking.

2.Post-laser marking inspection of character accuracy.

Solution Design

Han’s C·Vision, a subsidiary of Han’s Laser, offers the HVVS 3D vision software, equipped with advanced 3D algorithmic tools and compatibility with multiple 3D cameras. When paired with a high-precision 3D line-scan camera, this software forms a robust CCD vision-based laser marking machine that aligns seamlessly with the visual requirements of keyboard marking.

Detection Process

Using depth images captured by the 3D camera, the system leverages depth thresholds to isolate the keycap area. It applies image morphology techniques to accurately define keycap edges and outputs each keycap’s precise location. With three distinct positioning zones, the system performs simultaneous marking.

3D Line Scan Brightness Map

3D Line-Scan Depth Map

This solution also captures both brightness and depth images to establish the spatial relationship between the character and keycap positions. This data enables the software to detect character misalignment or omissions in marking.

Post-Laser Engraving Character Inspection

Solution Advantages

The HVVS 3D system offers several critical advantages:

Automatic Position Compensation: Based on vision-based positioning data, the optical system adjusts marking locations automatically.

High-Precision Detection: It measures the Z-axis distance between the keycap marking surface and the focusing lens, with detection precision reaching ≤0.03mm.

Consistent Character Positioning: Ensures character placement accuracy on each keycap within ±0.2mm.

Sub-Millimeter Vision Precision: Achieves a vision recognition accuracy of up to 0.01mm.

Versatile Keycap Detection: Compatible with various colors (black, white, blue, pink) and shapes (round, square, irregular).

Automatic Product Differentiation: Identifies product variations and adapts marking patterns accordingly.

Adaptive Auto-Positioning: Automatically adjusts without requiring manual calibration, enhancing usability and reducing labor costs.

Enhanced Productivity with Han’s C·Vision HV Series

Han’s C·Vision developed the HV series to support rapid advancements in automation and manufacturing processes, integrating leading 3D and AI technologies for enhanced accuracy and efficiency. The HV series software platform features a complete, modular architecture and hundreds of algorithmic tools for machine vision, blending optics, intelligent control, and software into a cohesive, high-functioning system.

Designed for a range of industries, including consumer electronics, automotive battery production, electrical components, and packaging for food and pharmaceuticals, the HV series delivers a flexible, user-friendly solution that meets complex automation needs. By improving productivity and reducing production costs, Han’s C·Vision HV series supports manufacturers on the path to smarter, more efficient production.

Conclusion

Han’s C·Vision HV series offers a powerful, intelligent solution for keyboard laser marking, leveraging advanced machine vision to ensure precision, flexibility, and efficiency. This cutting-edge technology not only meets the demands of high-quality marking but also supports broader automation goals, helping manufacturers streamline processes, reduce costs, and achieve consistent, reliable output. As industries continue to evolve, Han’s C·Vision remains committed to providing innovative tools that empower businesses to meet modern manufacturing challenges and excel in a competitive market.

For more information on implementing these solutions in your production line, reach out to Han’s Laser for expert guidance and support.