Cable Marking System Arcuate Zone Laser Stability
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Solution Overview
Problem
The challenge in laser marking of cables lies in minimizing vibrations during high-speed marking, which causes deformation of characters, especially on non-perfectly circular or twisted cables, leading to distorted patterns and reduced readability.
Innovation Solution
Implementing a cable marking system that uses curvature to control cable movement, combined with mechanical tension and guiding devices to prevent vibrations, allowing the laser beam to follow a curved trajectory parallel to the cable's surface, thereby maintaining consistent marking quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rectilinear marking zone is used with high-speed laser scanning, then productivity is improved, but manufacturing precision deteriorates due to cable vibrations causing character deformation
Solution Approach 1:
The patent applies curvature by replacing the rectilinear marking zone with an arcuate marking zone. The cable follows a curved path defined by a radius R, and the laser beam tracks along this arcuate trajectory. This curvature stabilizes the cable during high-speed marking, preventing vibrations and character deformation while maintaining high productivity. The arcuate geometry provides mechanical stability without sacrificing marking speed.
2Manufacturing precision
If the laser beam scanning time is increased to reduce vibrations, then manufacturing precision is improved, but productivity deteriorates due to slower marking speed
Solution Approach 1:
The arcuate marking zone with radius R provides inherent mechanical stability to the cable during the laser scanning process. This curvature constraint prevents cable vibrations and movements transverse to the direction of travel, allowing high-speed scanning without character deformation. The system achieves both precision and speed simultaneously through the geometric stabilization provided by the curved path.
3Manufacturing precision
If a high-energy laser with low rate of fire is used, then manufacturing precision is improved by reducing vibrations, but productivity deteriorates due to slower marking rate
Solution Approach 1:
The patent employs an arcuate marking zone that stabilizes the cable geometry during marking. This curved path configuration prevents vibrations and maintains positioning accuracy even when using high-frequency laser sources. The system can therefore use high-rate lasers (producing many shots per character) without sacrificing precision, achieving both high productivity and manufacturing precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively minimizes character deformation and maintains marking quality by stabilizing the cable's movement, ensuring clear and readable patterns even on complex cable geometries.
Implementation Method 1
The marking can for example consist of an ablation of material. It can also consist of a discoloration of the cable sheath.
Implementation Method 2
In the case of discoloration, ultraviolet (UV) lasers can be used to strike cable sheaths doped with titanium dioxide pigment.
Data Source
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AI summary
The invention relates to a cable marking system comprising: - at least one marking area for marking a portion of cable by means of at least one laser device; - at least one laser device; - at least one cable-driving device designed to pass said cable through said at least one marking area.