Coating Unit Calibration for Consistent 3D Layer Thickness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In additive manufacturing, existing methods struggle to ensure accurate and consistent layer application in three-dimensional object production, leading to defects and variations in layer thickness due to uncertainties in the distance between application elements of the coating unit.
Innovation Solution
A calibration method using a detection device to determine correction values for application elements, ensuring they are adjusted to the same height, thereby improving layer application accuracy and consistency by positioning the coating unit at specific measuring positions and detecting position reference values to calculate necessary adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the coating unit moves across the build area to apply layers, then productivity is improved through automated layer application, but manufacturing precision deteriorates due to uncertainties in the distance between application elements
Solution Approach 1:
The patent applies preliminary action by performing calibration of the application elements' distance and height positions before the actual layer application process. The system determines correction values for the distance and height of application elements in advance, ensuring that precision requirements are met before productivity-critical layer application begins. This pre-calibration step resolves the contradiction by establishing accurate geometric parameters beforehand, allowing subsequent high-speed layer application without compromising thickness consistency.
2Manufacturing precision
If the application elements are positioned at predefined distances to ensure manufacturing precision, then layer thickness consistency is improved, but device complexity increases due to additional calibration requirements
Solution Approach 1:
The patent implements self-service by enabling the calibration system to automatically determine correction values for application element positions and distances without requiring manual intervention or complex external measurement equipment. The system uses its own detection devices and processing units to perform self-calibration, storing correction values for subsequent use. This approach improves layer thickness consistency while avoiding the need for overly complex external calibration apparatus, as the system calibrates itself autonomously.
3Manufacturing precision
If calibration measurements are performed at multiple positions to improve manufacturing precision, then application element alignment is improved, but measurement time increases
Solution Approach 1:
The patent applies partial action by performing calibration measurements at selectively determined positions rather than continuously across the entire build area. The system identifies specific measuring positions that are sufficient to determine correction values for application element distances and heights, without requiring exhaustive measurement at every possible location. This approach achieves adequate alignment precision while minimizing calibration time, as the system uses a limited set of strategic measurement points to infer overall geometric parameters.
Data Source
AI summary
A calibration method includes positioning the coating unit in a first measuring position and detecting a first position reference value with respect to the reference point and a first measuring point associated with the coating unit at the first measuring position, positioning the coating unit in a second measuring position by moving the coating unit in the direction of movement and detecting a second position reference value with respect to the reference point and a second measuring point associated with the coating unit at the second measuring position, and determining a correction value for the first application element and/or the second application element from the detected first position reference value and the detected second position reference value.