Single-Material 3D Printer Assembly With Rack-and-Pinion Motion
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Solution Overview
Problem
Conventional 3D printers require multiple mechanical parts from different companies, increasing cost, complexity, and assembly time, as they often use threaded rods and timing belts that cannot be made from a single material, leading to tolerance stackup issues.
Innovation Solution
A 3D printer kit comprising a set of parts made from a single material, utilizing rack and pinion mechanisms along the x, y, and z axes to avoid tolerance stackup, with all moving and structural parts except the specimen receiving plate being 3D printed, and using non-3D printed materials for motors and fans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple mechanical parts from different companies are used, then the 3D printer can be assembled with available components, but the cost, complexity and assembly time increase
Solution Approach 1:
The patent combines multiple separate mechanical components (rack, pinion, structural elements) into a single integrated 3D-printed part. This merging eliminates the need to source and assemble multiple parts from different companies, directly reducing assembly complexity while maintaining ease of manufacture through additive manufacturing.
Solution Approach 2:
The single integrated part performs multiple functions simultaneously - it serves as both the structural support and the motion transmission mechanism (rack and pinion). This multi-functionality reduces the total number of components needed, thereby simplifying the overall device assembly while still providing all necessary mechanical functions.
2Ease of manufacture
If threaded rods and timing belts are used, then the mechanical structure can be assembled, but tolerance stackup issues occur
Solution Approach 1:
By merging the rack and pinion into a single 3D-printed component, the patent eliminates the interface between separate parts where tolerance stackup would occur. The monolithic structure ensures consistent geometric relationships throughout the motion transmission mechanism, directly improving manufacturing precision.
Solution Approach 2:
The entire mechanical structure is produced using the same 3D printing process and material, creating homogeneous manufacturing conditions. This homogeneity ensures consistent tolerance characteristics throughout the part, eliminating the tolerance stackup issues that arise when assembling parts from different manufacturing processes with different tolerance regimes.
3Ease of manufacture
If multiple parts are assembled from different companies, then component availability is improved, but the cost increases
Solution Approach 1:
The patent merges multiple billable components into a single 3D-printed part, eliminating the need to purchase and assemble multiple separate components from different suppliers. This directly reduces the total cost of assembly while the digital nature of 3D printing maintains component availability through downloadable design files.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution allows for precise positioning of the hot end within the 3D printer, reducing assembly complexity and cost by eliminating the need for multiple components and minimizing tolerance stackup, while enabling efficient 3D printing with improved precision.
Implementation Method 1
The specimen holder component comprises a y-axis rack and pinion mechanism for moving the specimen holder component along a y-axis within the 3D printer
Data Source
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AI summary
A three-dimensional (3D) printer, a set of parts and associated methods for procuring and/or building the 3D printer for printing a specimen therewithin. The set of parts may be designed to be provided in a single material and for avoiding tolerance stackup.