Adaptive Material Deposition With Scan-Guided Layer Compensation

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Solution Overview

Problem

Traditional additive manufacturing methods require pre-planned slices and mechanical planarization, which can lead to delays, material waste, and inaccuracies, especially when working with non-planar or multi-component materials.

Innovation Solution

A closed-feedback loop system that uses real-time scanning data to adapt layer planning during fabrication, allowing for non-planar and non-uniform layer deposition, eliminating the need for mechanical flattening and enabling more accurate matching of the fabricated object to the digital model.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If pre-planned slices and mechanical planarization are used, then manufacturing process is simplified, but manufacturing precision and material waste are worsened

Engineering Contradiction:

Improvemanufacturing process simplicityVSAvoiddimensional accuracy

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent implements a closed-loop feedback system where a scanner continuously monitors the fabricated object's surface during additive manufacturing. The scan data is fed back to the slice planner, which dynamically adjusts subsequent layer deposition plans to compensate for detected deviations, eliminating the need for mechanical planarization while maintaining high precision

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The slice planning process transitions from static pre-planning to dynamic adaptive planning. The system continuously updates the fabrication plan based on real-time scan data, allowing the layer geometry and deposition parameters to adapt dynamically to actual manufacturing variations, thereby improving precision without mechanical intervention

Inventive Principle:

Principle #15Dynamics

2Shape

If mechanical planarization is performed, then surface flatness is improved, but manufacturing time and device complexity increase

Engineering Contradiction:

Improvesurface flatnessVSAvoidmanufacturing speed

Core Design Contradiction:

ShapeVSProductivity

Solution Approach 1:

The patent replaces mechanical planarization systems (rollers, scrapers, mills) with a scanning-based feedback system. The scanner detects surface height variations, and the system computationally compensates for these variations by adjusting subsequent material deposition, achieving surface flatness without mechanical contact or additional processing steps

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces scan data as an intermediary between the fabricated object and the control system. This digital representation of the actual surface geometry enables the slice planner to compute compensation strategies without physical intervention, eliminating mechanical planarization equipment and associated time delays

Inventive Principle:

Principle #24Intermediary (Mediator)

3Manufacturing precision

If corrective layers are inserted to planarize surface, then surface accuracy is improved, but manufacturing time and material waste increase

Engineering Contradiction:

Improvesurface accuracyVSAvoidmanufacturing delay

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent performs preliminary compensation by adjusting the slice plan before material deposition. Instead of adding corrective layers after detecting errors, the system proactively modifies the next layer's geometry and deposition parameters to preemptively compensate for previously detected surface deviations, eliminating the need for separate corrective operations

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent converts detected surface deviations (harm) into opportunities for adaptive compensation (benefit). Rather than viewing scan-detected errors as problems requiring corrective layers, the system uses this information to intelligently adjust subsequent deposition, transforming measurement data into precise control actions that eliminate waste and delays

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

4Device complexity

If pre-planned slices are used, then device complexity is reduced, but adaptability and measurement precision are worsened

Engineering Contradiction:

Improvesystem simplicityVSAvoidadaptive capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements a universal adaptive slice planning system that handles both ideal and deviated surface conditions through the same feedback-driven process. The single system automatically adjusts its behavior based on scan data, providing both simplicity when surfaces are flat and adaptability when deviations occur, without requiring separate processing paths

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11155040B2Adaptive material deposition for additive manufacturing

Publication Date: 2021.10.26 MASSACHUSETTS INST OF TECH

AI summary

A closed-loop adaptive material deposition apparatus and method uses a scanning system to monitor an additively manufactured object as it is being fabricated and adapting the geometric shape and material composition of the subsequent layers based on the scan data. The scanning system repeatedly captures geometric and/or material information of a partially manufactured object with optional auxiliary objects inserted during the manufacturing process. Based on this information, the actual surface geometry and/or actual material composition is computed. Surface geometry may be offset and used as a slicing surface for the next portion of the digital model. The shape of the slicing surface may then be recomputed each time the system scans the partially fabricated object.