3D Printing Defect Monitoring With In-Situ Toolpath Correction
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Solution Overview
Problem
Existing 3D printing methods lack real-time monitoring and correction capabilities for defects during the additive manufacturing process, leading to inaccuracies in geometry and properties of printed objects due to deviations in filament diameter, feed rate, and temperature control, resulting in defects like drooping, warping, and poor adhesion.
Innovation Solution
A closed-loop system that monitors and corrects defects in real-time by analyzing printed layers and updating slicing parameters and object models, using functional tool heads with multi-axis motion for functions like milling, heating, and extrusion, and generates reports on defects and properties for optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If real-time monitoring and correction systems are implemented, then manufacturing precision and reliability are improved, but device complexity increases
Solution Approach 1:
The patent implements a closed-loop feedback system where sensors continuously monitor the printing process parameters (temperature, filament diameter, layer quality) and provide real-time data to a control system. The control system compares actual parameters with target values and automatically adjusts printing parameters to correct deviations, thereby maintaining high manufacturing precision without requiring overly complex manual intervention systems
Solution Approach 2:
The patent replaces manual inspection and correction mechanisms with automated sensing and control systems. Optical sensors, thermal sensors, and machine learning algorithms substitute for human operators, enabling real-time detection and correction of defects through software-based control rather than complex mechanical adjustment systems
2Reliability
If real-time monitoring and correction systems are implemented, then reliability of printed objects is improved, but device complexity increases
Solution Approach 1:
The system continuously monitors printing process parameters and provides real-time feedback to detect and correct defects before they compromise object reliability. Sensors track temperature variations, filament consistency, and layer adhesion quality, enabling proactive quality assurance that ensures reliable printed objects
Solution Approach 2:
The printing system performs self-diagnosis and self-correction through automated sensing and control. The system independently detects defects, analyzes their impact on reliability, and adjusts printing parameters without external intervention, thereby ensuring object reliability through autonomous quality management
3Productivity
If manual inspection and post-processing are used, then device complexity is reduced, but productivity is reduced due to inability to correct defects during printing
Solution Approach 1:
The patent enables continuous printing operations by implementing real-time defect detection and correction during the printing process itself. Instead of interrupting production for inspection or post-processing, the system maintains continuous useful action by automatically correcting deviations as they occur, thereby maximizing productivity without requiring complex post-processing workflows
Data Source
AI summary
The present invention provides a system and a method for real time monitoring and identifying defects occurring in a three dimensional object build via an additive manufacturing process. Further, the present invention provides in-situ correction of such defects by a plurality of functional tool heads possessing freedom of motion in arbitrary planes and approach, where the functional tool heads are automatically and independently controlled based on a feedback analysis from the printing process, implementing analyzing techniques. Furthermore, the present invention provides a mechanism for analyzing defected data collected from detection devices and correcting tool path instructions and object model in-situ during construction of a 3D object. A build report is also generated that displays, in 3D space, the structural geometry and inherent properties of a final build object along with the features of corrected and uncorrected defects. Advantageously, the build report helps in improving 3D printing process for subsequent objects.