Laser Scanner Control Trajectory for Precise Control Point Correction
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Solution Overview
Problem
Conventional laser processing systems face challenges in accurately correcting control points and tool-center point (TCP) settings due to positional errors between CAD data and actual workpieces, requiring teaching jigs and additional guide lasers, which are inefficient and cumbersome.
Innovation Solution
A laser processing system with a scanner and a scanner control device that uses a control point correction trajectory to identify and correct deviations in the laser beam's path, allowing for precise adjustment of control points without the need for teaching jigs or additional guide lasers, by illuminating the workpiece with a predetermined length and shape trajectory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional teaching methods using teaching jigs and additional guide lasers are used to correct control points, then measurement precision and manufacturing precision can be improved, but device complexity and ease of operation deteriorate due to requiring additional equipment and cumbersome procedures
Solution Approach 1:
The patent extracts and eliminates the teaching jig and additional guide laser from the system. Instead of using separate external devices for teaching and alignment, the system uses the scanner's own laser beam to perform both processing and teaching functions, thereby removing unnecessary equipment and simplifying the overall system configuration
Solution Approach 2:
The scanner's laser beam is made multi-functional by using it both for the actual laser processing and for the teaching/correction process. The same laser beam that processes the workpiece is also used to create the teaching trajectory and enable control point correction, eliminating the need for separate guide lasers and teaching equipment
2Measurement precision
If teaching jigs and additional guide lasers are used for control point correction, then measurement precision improves, but ease of operation and productivity worsen due to time-consuming setup and correction procedures
Solution Approach 1:
The system performs self-teaching and self-correction using its own laser beam. The scanner irradiates the workpiece with a teaching trajectory program, and the reflected or scattered light from the workpiece surface is detected to automatically determine the actual laser irradiation position, enabling the system to correct its own control points without external assistance or manual intervention
Solution Approach 2:
The system implements a feedback mechanism where the actual laser irradiation position on the workpiece is detected and used to automatically adjust and correct the control points. The detected position information feeds back to the control system, which then modifies the teaching trajectory and control parameters to eliminate deviations between the programmed and actual laser paths
3Manufacturing precision
If multiple separate devices (teaching jig, guide laser) are used for correction, then manufacturing precision can be maintained, but ease of manufacture and device complexity worsen
Solution Approach 1:
The patent merges the teaching function, alignment function, and processing function into a single integrated system. The scanner control device combines the trajectory control for teaching with the actual processing control, and the laser beam serves both as a teaching tool and a processing tool, eliminating the need for separate teaching jigs and guide lasers
Data Source
AI summary
Provided is a laser processing system with which correction of a control point can be carried out easily. This laser processing system is provided with a scanner capable of scanning a workpiece with laser light, a moving device for moving the scanner relative to the workpiece, and a scanner control device for controlling the scanner, wherein the scanner control device has a trajectory control unit for controlling the scanner such that the workpiece is irradiated with a control point correction trajectory for correcting a preset control point when the movement device is in a stopped state, and the control point correction trajectory has a prescribed length for specifying deviation of the laser light in the optical axis direction, and a prescribed shape for specifying the position of the control point and a direction of a coordinate system defined by the control point.