Towards Compensation for Servo-Control Defects in Coordinate Measuring Machines (CMMs)

Area of Science:

• Metrology and Measurement Science
• Mechanical Engineering
• Manufacturing Technology

Background:

• Coordinate Measuring Machines (CMMs) are vital for high-precision measurements in automotive, aerospace, and military industries.
• CMMs exhibit limitations in accuracy for specific tasks like roundness or contour measurement on oblique surfaces.
• Servo-loop inaccuracies in CMMs lead to deviations between theoretical and actual coordinates, causing errors in feature dimensions.

Purpose of the Study:

• To propose innovative methods for enhancing CMM performance in specific measurement tasks.
• To address and compensate for errors arising from CMM servo-control inaccuracies.
• To improve the accuracy of measurements on standard and skewed surfaces using CMMs.

Main Methods:

• Development of novel algorithms for CMM data acquisition and processing.
• Implementation of feature construction techniques to overcome direct measurement limitations.
• Integration of servo-control error compensation into measurement routines.

Main Results:

• Demonstrated significant improvements in measurement accuracy for standard geometric parts.
• Achieved enhanced precision when measuring features on skewed and conical surfaces.
• Validated the effectiveness of proposed methods in mitigating servo-loop-induced errors.

Conclusions:

• The developed methods offer a viable solution for improving CMM accuracy in challenging measurement scenarios.
• Accounting for servo-control faults is crucial for precise dimensional analysis on complex geometries.
• The findings contribute to advancing metrology capabilities in precision manufacturing.