3D Printing Platform Rotation for Circular Layer Accuracy
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Solution Overview
Problem
Conventional 3D printing methods require complex designs and long fabrication times due to the need for continuous direction changes and rapid acceleration/deceleration of nozzles when approximating circular or rounded layers using straight lines, leading to reduced accuracy and increased pressure on drive mechanisms.
Innovation Solution
The implementation of a 3D printing system that includes a build platform capable of selective rotation, allowing the nozzle to deposit material while the platform rotates, thereby simplifying the deposition process by using cylindrical coordinates for curved sections and Cartesian coordinates for straight sections, reducing the complexity of the design and fabrication time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the nozzle moves in straight lines to approximate circular layers, then the manufacturing process is simple, but the manufacturing precision and accuracy deteriorate
Solution Approach 1:
Instead of moving the nozzle in complex paths to create circular layers, the build platform is rotated in reverse - the platform rotates while the nozzle remains stationary or moves simply, thereby creating circular layers through the platform's rotation rather than the nozzle's complex motion
Solution Approach 2:
The solution transitions from two-dimensional nozzle movement (X-Y plane straight lines) to three-dimensional motion by adding platform rotation, allowing circular layers to be created through rotational motion around the Z-axis while the nozzle deposits material in a simpler manner
2Manufacturing precision
If the nozzle continuously changes direction to fabricate circular layers, then the layer shape accuracy is improved, but the fabrication time increases and drive mechanism stress increases
Solution Approach 1:
The conventional approach has the nozzle move in circular or approximated paths, but this invention inverts the approach by keeping the nozzle stationary or moving simply while rotating the build platform, thereby achieving circular layer accuracy without complex nozzle motion
Solution Approach 2:
The system dynamically switches between Cartesian coordinate system (nozzle movement) for straight sections and cylindrical coordinate system (platform rotation) for curved sections, optimizing the fabrication process by using the most efficient motion method for each segment
3Manufacturing precision
If the nozzle rapidly accelerates and decelerates to follow complex paths, then the circular layer accuracy is improved, but the drive mechanism pressure increases
Solution Approach 1:
Instead of forcing the nozzle to rapidly accelerate and decelerate along complex paths, the build platform is rotated at controlled speeds while the nozzle deposits material, thereby achieving rounded section accuracy without subjecting the nozzle drive mechanism to high forces
Solution Approach 2:
The solution embraces curvature by rotating the build platform, allowing circular and rounded sections to be fabricated through natural rotational motion rather than forcing straight-line approximations, thereby reducing the need for rapid acceleration and deceleration of the nozzle
Data Source
AI summary
Embodiments include an apparatus for fabricating a three-dimensional (3D) object from a digital representation of the 3D object stored in a computer readable media. The apparatus includes a build platform on which the 3D object is to be fabricated and a nozzle configured to deposit printing material on the build platform to fabricate the 3D object. The apparatus further includes a first drive mechanism configured to drive the nozzle over the build platform and a second drive mechanism configured to rotate the build platform.