Laser Scanner Path Correction for Precise Control Point Alignment
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Solution Overview
Problem
Conventional laser processing systems require teaching jigs and additional guide lasers to correct control points and tool-center points, which is inefficient and not easily adaptable for precise laser irradiation.
Innovation Solution
A laser processing system with a scanner and a program generation device that converts scanner programs into control point correction programs, allowing the scanner to repeatedly scan a control point correction trajectory at a predetermined cycle for precise correction without the need for teaching jigs or additional guide lasers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If teaching jigs and additional guide lasers are used to correct control points, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the control point correction function from the main laser processing system by using the scanner's existing laser beam to generate correction trajectories. This eliminates the need for additional teaching jigs and guide lasers, reducing device complexity while maintaining correction precision through the scanner's inherent positioning capabilities
Solution Approach 2:
The scanner's laser beam is made multi-functional by using it for both the primary laser processing task and for generating control point correction trajectories. This universal use of the existing laser beam eliminates the need for separate correction equipment, reducing system complexity while maintaining measurement precision through the scanner's accurate trajectory control
2Measurement precision
If teaching jigs are attached to the robot and additional guide lasers are installed on the scanner, then control point correction capability is improved, but ease of operation deteriorates
Solution Approach 1:
The system performs self-correction by using its own scanner laser beam to generate correction trajectories without requiring external teaching jigs or guide lasers. The scanner control device automatically generates the correction program based on the workpiece surface, eliminating the need for operators to attach additional equipment and improving operational efficiency
Solution Approach 2:
The control point correction is performed as a preliminary step before main laser processing by generating and executing a correction program that adjusts control points based on actual workpiece surface measurements. This preliminary correction ensures accurate subsequent processing without requiring complex operational procedures
3Productivity
If the robot moves the scanner during control point correction, then productivity is maintained, but manufacturing precision deteriorates
Solution Approach 1:
The laser processing operation is segmented into distinct phases: first the robot moves the scanner to capture the workpiece surface and generate correction trajectories, then the robot stops and only the scanner moves to execute the correction program. This segmentation allows the robot positioning to be performed separately from the precision scanning operation, maintaining both productivity and manufacturing precision
Data Source
AI summary
Provided is a laser processing system with which correction of a path of a laser illumination point can be carried out easily. This laser processing system is provided with a scanner, a moving device, a scanner control device for controlling the scanner, and a program generation device, wherein the program generation device converts a scanner program to a control point correction program for correcting a preset control point, the scanner control device has a trajectory control unit for controlling the scanner on the basis of the control point correction program such that a workpiece is illuminated with a control point correction trajectory for correcting the control point in a state in which the movement device is stopped, and the trajectory control unit controls the scanner on the basis of the control point correction program such that the control point correction trajectory is repeatedly scanned at predetermined intervals.