3D Printer Elevator Compensation for Sub-10 Micron Tolerances
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Solution Overview
Problem
Existing stereolithography printers face limitations in achieving feature size tolerances smaller than 10 microns due to optical and mechanical system constraints, resulting in resolution limits of 10 to 20 microns.
Innovation Solution
A 3D printing system with an elevator mechanism featuring adjustable upper and lower supports, actuator-controlled inclination, and sensors for mechanical compensation, enabling precise positioning and uniform resin layers to achieve tolerances below 10 microns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional stereolithography printers are used, then the manufacturing process is simple, but the manufacturing precision is limited to 10-20 microns
Solution Approach 1:
The elevator mechanism incorporates actuators that dynamically adjust the inclination of the upper support to compensate for fluidic drag and mechanical deflections during the printing process, enabling sub-10 micron precision through real-time mechanical compensation
Solution Approach 2:
Sensors detect mechanical deflections and fluidic drag forces during elevator movement, providing feedback to the control system which adjusts the actuator positions to maintain precise layer thickness and feature size tolerances throughout the manufacturing process
2Manufacturing precision
If the elevator moves through resin to achieve precise positioning, then manufacturing precision improves, but fluidic drag increases causing mechanical deflections
Solution Approach 1:
The system calculates and applies preliminary compensatory forces through the actuators to counteract expected fluidic drag forces before they cause significant deflection, maintaining precise layer thickness despite the resistive forces encountered during resin traversal
Solution Approach 2:
The actuator system dynamically changes the mechanical parameters of the elevator by adjusting support inclination and position to offset the effects of fluidic drag, transforming the harmful force into a manageable parameter through real-time mechanical adjustment
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 system enables the production of 3D articles with dimensional tolerances as low as one micron, overcoming fluidic drag and mechanical deflections to achieve precise layer thicknesses and pixel sizes.
Implementation Method 1
The elevator actuator is configured to vary a vertical height of the datum surface above the upper side of the lower actuator and to modulate an inclination of the upper side of the upper support
Implementation Method 2
One class of 3D printers includes stereolithography printers having a general principle of operation including the selective curing and hardening of radiation curable (i.e., photocurable) liquid resins
Data Source
AI summary
A three-dimensional (3D) printing system is configured to print a 3D article in a layer-by-layer manner and includes a vertical beam, an elevator, and a build platform. The elevator is configured for vertical translation along the vertical beam and includes an upper support and a lower support. The lower support includes at least one elevator actuator extending upward from an upper side. The upper support has a lower side including a datum surface in engagement with the actuator. The elevator actuator is configured to modulate a position of the upper side of the upper support. The build platform includes a build plate coupled below a support plate. The build plate has a lower side for formation of the 3D article. The support plate has a lower side that engages the upper side of the upper support of the elevator to support the build platform.