3D Printing Toolpath Optimization via Island Aggregation
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Solution Overview
Problem
Current 3D printing methods, particularly FDM, face significant challenges in reducing machining time due to excessive printerhead travel and energy consumption, as they often involve inefficient toolpath generation and wasted motion, especially when printing complex models with multiple distinct parts.
Innovation Solution
A method and system for 3D printing that decompose volumetric object representations into continuous paths, aggregate non-continuous tool paths into islands, and generate motion segments to minimize extrusionless travel, allowing for optimized toolpath generation and reduced energy consumption by leveraging local dependencies and tool geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional FDM printing methods are used, then manufacturing flexibility is improved, but printing time increases significantly
Solution Approach 1:
The patent segments the printing process into multiple independent paths that can be executed in parallel. Each path corresponds to a separate extrusion sequence, allowing the printer to perform multiple deposition operations simultaneously rather than sequentially, thus reducing total printing time while maintaining manufacturing flexibility
Solution Approach 2:
The patent introduces a temporal dimension to the traditional spatial toolpath planning. By organizing extrusions into time-ordered paths rather than only spatial contours, the system enables parallel execution of multiple printing operations across different time intervals, effectively adding a dimension to the printing process that reduces overall manufacturing time
2Ease of operation
If standard toolpath generation is used, then ease of operation is maintained, but printerhead travel distance increases
Solution Approach 1:
The patent performs preliminary computation to determine optimal path sequences before actual printing begins. By pre-calculating the most efficient extrusion sequences and organizing them into parallel paths, the system minimizes printerhead travel distance during execution without requiring complex real-time decision-making, thus maintaining ease of operation while reducing travel distance
Solution Approach 2:
The patent makes the toolpath generation process adaptive by allowing dynamic adjustment of path sequences based on the specific model geometry and printing requirements. The system automatically optimizes the sequence of extrusions for each path, enabling the printerhead to move more efficiently between deposition points while maintaining operational simplicity through automated optimization
3Manufacturing precision
If sequential layer-by-layer printing is used, then manufacturing precision is ensured, but production time increases
Solution Approach 1:
The patent merges multiple sequential layer-by-layer printing operations into parallel paths that execute simultaneously. Instead of completing all extrusions in one layer before moving to the next, the system combines multiple extrusion sequences into parallel paths that can be executed concurrently, maintaining layer-by-layer precision while significantly reducing total production time through parallelization
Solution Approach 2:
The patent ensures continuous useful action by maintaining multiple active extrusion paths that operate simultaneously rather than having the printerhead idle between sequential operations. The parallel path structure allows continuous material deposition across multiple locations at the same time, eliminating wasted motion and idle time while preserving manufacturing precision through controlled parallel execution
Data Source
AI summary
A three dimensional (3D) printing system includes computer-executable instructions for obtaining a volumetric object representation file, parsing the volumetric object representation file into multiple layers, and for each layer, decomposing the layer into a sequence of continuous paths, aggregating non-continuous sets of tool paths with a single outer path and zero or more open or closed inner paths into islands, and generating one or more motion segments according to each island. Once generated, the motion segments may be aggregated to form a toolpath, which is used by the three dimensional printer to print a 3D model.