Dual Measuring Element Fixture for Faster CNC Machine Calibration
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Solution Overview
Problem
Existing methods for measuring machine tools are inefficient, requiring multiple setups and introducing errors due to the need for precise positioning, which can overlook inaccuracies in untraversed areas and be time-consuming, especially with the RENISHAW system's limited reference circles and positioning errors.
Innovation Solution
A device with two measuring elements spaced by a spacer element, allowing for simultaneous measurement of multiple axes with minimal setup adjustments, using a rigid connection and materials with low thermal expansion to maintain accuracy and stability, and flexible fastening options for stress-free attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple measurement setups are used to measure different axes, then measurement coverage is improved, but measurement time and positioning errors increase
Solution Approach 1:
The patent combines multiple measurement functions into a single integrated measurement setup. The measurement device includes multiple measuring elements (at least two) that can simultaneously measure different axes, eliminating the need to relocate the setup between measurements. This merging approach maintains comprehensive measurement coverage while significantly reducing measurement time and avoiding positioning errors associated with multiple setups.
Solution Approach 2:
The measurement device is designed with multi-functionality to measure multiple axes and machine tool functions using a single setup. The device can perform various measurements including linear axis accuracy, rotary axis accuracy, and volumetric accuracy without requiring relocation or reconfiguration, thus improving efficiency while maintaining measurement precision.
2Adaptability or versatility
If measurement setup is relocated to measure specific axes, then measurement flexibility is improved, but positioning errors and measurement time increase
Solution Approach 1:
The patent integrates multiple measuring elements into a single fixed measurement setup that can measure all required axes simultaneously. This eliminates the need to relocate the measurement setup for different axes, thereby maintaining measurement flexibility through the device's inherent multi-axis capability while avoiding positioning errors that would result from repeated setup relocation.
3Ease of operation
If limited reference circles are used, then measurement simplicity is improved, but measurement coverage and accuracy in untraversed areas are reduced
Solution Approach 1:
The patent divides the measurement function into multiple measuring elements distributed at different positions and orientations within the single setup. This segmentation allows each measuring element to cover specific measurement zones, and collectively they provide comprehensive coverage of the entire measurement volume, including areas that would be missed by limited reference circles, while maintaining operational simplicity.
Data Source
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AI summary
The invention relates to a device (1) for use in a numerically controlled machine tool (100) for application in a method for measuring the numerically controlled machine tool (100), comprising: a first measuring element (3) for measuring via a measuring device; a second measuring element (3) for measuring via the measuring device; a spacer element (2) on which the first measuring element (3) and the second measuring element (3) are arranged at a distance to one another; and at least one securing section (4) for securing the device (1) on a machine part (20) of the machine tool (100).