Automated Hybrid Toolpath Planning for Additive-Subtractive Fabrication
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Solution Overview
Problem
Determination of toolpaths for part fabrication, especially by combined additive and subtractive techniques, is complex and time-consuming, leading to inefficiencies in fabrication time and material usage.
Innovation Solution
A method and system for automated toolpath generation that includes receiving a virtual part, modifying it for fabrication, and determining efficient additive and subtractive toolpaths, allowing for autonomous fabrication with reduced material waste and improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated toolpath generation is implemented, then productivity and fabrication efficiency are improved, but device complexity increases
Solution Approach 1:
The system performs automated toolpath generation where the fabrication system itself determines optimal toolpaths without external intervention. The controller autonomously processes part geometry, selects appropriate operations, and generates toolpaths, enabling the system to serve itself in the path planning function.
Solution Approach 2:
Manual toolpath planning (mechanical/human operation) is replaced with automated computational algorithms. The system uses computer-based processing to determine toolpaths, substituting human expertise and manual calculation with algorithmic automation that integrates with the fabrication control system.
2Manufacturing precision
If combined additive and subtractive techniques are used, then manufacturing precision is improved, but loss of time increases due to complex toolpath determination
Solution Approach 1:
The system merges additive and subtractive fabrication operations into a unified toolpath generation process. The controller integrates both operation types, allowing seamless transitions between material deposition and removal within the same automated workflow, optimizing the combined process for both precision and efficiency.
Solution Approach 2:
The system performs preliminary analysis of part geometry and requirements before generating toolpaths. By pre-processing the part data, identifying features, and determining appropriate operations in advance, the system reduces the time required during actual fabrication while ensuring high precision outcomes.
3Device complexity
If manual toolpath determination is performed, then device complexity is reduced, but loss of time and material inefficiency increase
Solution Approach 1:
The fabrication system autonomously determines toolpaths without requiring manual intervention. The controller self-manages the entire process from part interpretation to toolpath generation, eliminating the time loss associated with manual planning while maintaining system simplicity through integrated automation.
4Loss of substance
If automated toolpath generation is implemented, then loss of substance is reduced through optimized material usage, but device complexity increases
Solution Approach 1:
Manual material planning is replaced with automated computational algorithms that optimize material usage. The system calculates precise material requirements, optimizes deposition patterns, and minimizes waste through algorithmic control, substituting human estimation with precision computing.
Data Source
AI summary
A method for facilitating part fabrication, such as by automated toolpath generation, can include one or more of: receiving a virtual part; modifying the virtual part; and/or determining toolpaths to fabricate the target part. The toolpaths preferably define an ordered series of additive and subtractive toolpaths, more preferably wherein the additive and subtractive toolpaths are interleaved, which can function to achieve high manufacturing efficiency and/or performance. The method can additionally or alternatively include: generating machine instructions based on the toolpaths; fabricating the target part based on the machine instructions; calibrating the fabrication system; and/or any other suitable elements.