Laser Path Overlay Display for Galvanometer Scan Deviations
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Solution Overview
Problem
Existing galvanometer scanners face issues with disruptions in the actual laser path due to overshoot or feedback control, leading to undesired shapes or strengths in layered structures.
Innovation Solution
A laser path display apparatus and program for galvanometer scanners that overlap display commanded and actual laser paths, allowing users to visually confirm and investigate deviations, using a computer and display to set display layers and calculate actual coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If feedback control is used to control the laser path, then the laser scanning accuracy is improved, but overshoot occurs causing disruption of the actual laser path
Solution Approach 1:
The patent applies feedback control by acquiring actual coordinates of the laser light based on the state of mirrors or mirror drive devices, comparing them with commanded coordinates, and using this information to detect and investigate path disruptions. This feedback mechanism enables real-time monitoring and correction of laser path deviations caused by overshoot.
2Measurement precision
If the actual laser path disruption is investigated manually, then the cause can be identified, but the investigation process is time-consuming and inefficient
Solution Approach 1:
The patent creates a visual copy of both the commanded laser path and the actual laser path on a display device. By overlaying these two paths, the system enables immediate visual comparison and identification of deviations without manual measurement or analysis, significantly reducing investigation time while maintaining high detection accuracy.
3Loss of information
If the commanded and actual laser paths are displayed separately, then each path can be analyzed individually, but the comparison and deviation recognition become difficult
Solution Approach 1:
The patent merges the display of commanded laser path and actual laser path into a single visual interface by overlaying them. This combining approach preserves complete path information from both sources while making deviation recognition immediately evident through visual comparison, eliminating the need for separate analysis.
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
Enables efficient investigation of laser path disruptions by visually displaying commanded and actual paths in different colors, facilitating easy recognition and correction of deviations for improved layered structure formation.
Implementation Method 1
laser light emitted from a laser light source is reflected by the first mirror and the second mirror in turn and is radiated to the surface of a workpiece
Implementation Method 2
The galvanometer scanner sinters metal powder or the like as material of the workpiece in layers by scanning of the laser light to form a layered structure on the workpiece
Implementation Method 3
laser light emitted from a laser light source is reflected by the first mirror and the second mirror in turn
Implementation Method 4
laser light emitted from a laser light source is reflected by the first mirror and the second mirror in turn
Data Source
AI summary
A commanded coordinate acquisition unit acquires commanded coordinates for laser light relative to a workpiece, based on command information to mirror drive devices. An actual coordinate calculation unit calculates actual coordinates of the laser light relative to the workpiece, based on a state of at least either mirrors or the mirror drive devices. A display setting unit sets each of a part of layers of a layered structure S as a display layer Ld. A path display portion 45 overlappingly displays, for the set display layers Ld, a commanded laser path T1 as a path based on a history of the acquired commanded coordinates and an actual laser path as a path T2 based on a history of the calculated actual coordinates.