Dual-Motion Additive Manufacturing System for High-Speed Precision
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Solution Overview
Problem
Existing additive manufacturing systems face challenges with high-mass leadscrew configurations that limit high-speed and high-acceleration capabilities due to high momentum and chattering issues, while belt-driven systems suffer from rigidity loss and limited build volumes due to belt stretching.
Innovation Solution
The system employs a dual-motion structure comprising a high-mass leadscrew gantry for stable movement and a lightweight belt-driven gantry for high-response rate movements, allowing for both high-stability and high-speed operations within a larger build volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a leadscrew configuration is used to achieve high-torque and high-precision, then manufacturing precision is improved, but the high mass increases momentum which limits high-speed operation
Solution Approach 1:
The motion system is divided into two independent structures: a leadscrew gantry for stable, precision movement and a belt-driven gantry for high-speed positioning. This segmentation allows each subsystem to optimize for its specific function without compromise.
Solution Approach 2:
The belt-driven gantry is positioned within or alongside the leadscrew gantry structure, with both systems working together to move the print head. The nested arrangement allows the lightweight belt system to handle rapid positioning while the heavier leadscrew system provides stable motion.
2Stability of the object's composition
If a leadscrew configuration is used to achieve high-rigidity and large build volume, then stability is improved, but chattering occurs which reduces printing quality
Solution Approach 1:
The motion system is divided into two independent structures: a leadscrew gantry for stable, precision movement and a belt-driven gantry for high-speed positioning. This segmentation allows each subsystem to optimize for its specific function without compromise.
Solution Approach 2:
The system dynamically switches between or combines the characteristics of both motion systems: using the belt-driven gantry for rapid positioning (high dynamics) and the leadscrew gantry for precise, stable motion, thereby avoiding chattering while maintaining speed.
3Productivity
If a belt-driven motion platform is used to achieve high-speed and high-acceleration, then productivity is improved, but belt stretching occurs which loses rigidity and limits build volume
Solution Approach 1:
The motion system is divided into two independent structures: a leadscrew gantry for stable, precision movement and a belt-driven gantry for high-speed positioning. This segmentation allows each subsystem to optimize for its specific function without compromise.
Solution Approach 2:
The motion system combines two different mechanical transmission approaches (leadscrew and belt) into a composite system, leveraging the rigidity and precision of leadscrews with the speed and acceleration capabilities of belts, thereby achieving both high productivity and system stability.
Data Source
AI summary
An additive manufacturing system is disclosed for use in fabricating a structure. The additive manufacturing system may include a print head configured to discharge a material, a first structure, and a second structure. The first structure may be configured to move the print head within a plane during discharge of the material. The second structure may be configured to move the print head within the plane during material discharge, the second structure being movable together with the print head by the first structure.