Calibration Gauge Offset Detection for Rotary Table Alignment
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Solution Overview
Problem
Conventional roundness measuring devices require time-consuming and labor-intensive measurement axis alignment procedures, especially when swapping out styluses or changing the orientation of the head holder, which hampers measurement efficiency.
Innovation Solution
A method using a calibration gauge with plane symmetry, set outside the rotation center of the rotary table, to determine axis offset by analyzing phase patterns during rotation, allowing for fine relative calibration of the stylus head and rotary table positions, and displaying the offset direction for user correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement axis alignment procedures are used, then measurement accuracy can be maintained, but time consumption and labor intensity increase significantly
Solution Approach 1:
The calibration gauge is pre-positioned at a predetermined location on the rotary table before measurement begins. This preliminary setup establishes a reference marker that eliminates the need for time-consuming alignment procedures when swapping styluses or changing head holder orientations, as the system can quickly re-acquire the same reference position
Solution Approach 2:
A calibration gauge with plane symmetry is introduced as an intermediary reference object between the measurement system and the measurement axis. This gauge serves as a mediator that provides detectable features (edges, surfaces) for the stylus to acquire, enabling the system to determine axis offset without direct operator intervention in the alignment process
2Measurement precision
If conventional alignment procedures are used, then accurate measurement can be achieved, but operational complexity and labor intensity increase
Solution Approach 1:
The measurement system performs self-alignment by automatically detecting features on the calibration gauge using the stylus. The system autonomously determines axis offset by analyzing phase patterns from multiple measurements of the gauge's geometric features, eliminating the need for operator skill in manual alignment procedures
Solution Approach 2:
The system uses feedback from stylus measurements of the calibration gauge to automatically determine axis offset. By measuring the gauge at multiple positions and analyzing the phase patterns of the detected features, the system generates feedback information that enables automatic correction of axis alignment without operator intervention
3Adaptability or versatility
If stylus swapping or head holder orientation changes are performed, then measurement versatility is improved, but re-alignment time and productivity loss increase
Solution Approach 1:
The calibration gauge serves multiple functions: it provides reference features for axis offset determination, works with different stylus types, and remains valid for various head holder orientations. This universal reference object eliminates the need for re-alignment when changing measurement configurations, as the same gauge can be used across different measurement scenarios
Solution Approach 2:
The calibration gauge is pre-positioned once on the rotary table, creating a permanent reference that remains valid through stylus swaps and head holder orientation changes. This preliminary setup eliminates the need for repeated alignment procedures, maintaining productivity despite increased measurement versatility
Data Source
AI summary
A calibration gauge having plane symmetry is set in a position other than a rotation center of a rotary table. The calibration gauge is measured while the rotary table is driven to rotate. Offset of a measurement axis is determined based on a phase pattern of the rotary table when a stylus head detects the calibration gauge.