Subtractive Machine Calibration Using Embedded Gauges and Feedback
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Solution Overview
Problem
Subtractive fabrication machines require lengthy and expertise-dependent manual calibration processes, leading to low-quality outputs for non-expert users, such as those in education or maker spaces, preventing them from achieving high-quality results.
Innovation Solution
A 4-step calibration process with an algorithm managing dependencies, additional calibration aides (gauges), and an automated/semi-automated system that optimizes settings based on the specific model, allowing non-experts to achieve high-quality results by embedding gauges in the fabrication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual calibration process is used, then manufacturing precision can be improved, but operation complexity and time consumption increase significantly
Solution Approach 1:
The calibration system performs self-calibration by automatically analyzing test pattern images, calculating deviation values, and generating correction parameters without requiring expert manual intervention. The system serves itself by using its own output to identify and correct its own errors.
Solution Approach 2:
The system captures images of test patterns after fabrication, compares them against ideal patterns, and uses the deviation feedback to automatically generate correction parameters that are applied to subsequent operations, creating a closed-loop calibration process.
2Manufacturing precision
If expert manual calibration is performed, then manufacturing precision improves, but loss of time increases
Solution Approach 1:
The patent replaces manual mechanical calibration operations with an automated image processing and computational system that calculates correction parameters algorithmically, eliminating the time-consuming manual measurement and adjustment processes.
Solution Approach 2:
The system performs preliminary calibration by generating and analyzing test patterns before actual production, allowing correction parameters to be determined in advance and applied to all subsequent fabrication operations.
3Productivity
If automated calibration is implemented, then productivity increases, but device complexity increases
Solution Approach 1:
The calibration system uses a universal image processing approach that can handle different test patterns, fabrication methods, and error types through a single automated workflow, making the complexity manageable through standardized multi-functional procedures.
Data Source
AI summary
A calibration subsystem comprising: a control system that provides a control signal to a fabrication machine to process a sample of a workpiece, at least one sensor sensing the effect that the processing had on the sample, wherein the control system computes the difference between the sensed effect and a desired effect, and the control system, in accordance with the difference, updates settings of the subtractive fabrication machine and/or of one or more models to be cut subsequently.