Modelling of pretravel for touch trigger probes on indexable probe heads on coordinate measuring machines

Yuan, Shen; Zhang, Xianping

doi:10.1007/bf01305872

Cited by 7 publications

(1 citation statement)

References 2 publications

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“…According to Figure 2b,c, the coordinate system is established as shown in Figure 5, and the force and displacement changes of the probe are analyzed in the process from contacting the measured part to sending out the trigger signal [24]. In Figure5a, FLi (i = A, B, C) is the support force of the right support ball to the probe positioning pin at point I;FRi is the support force of the left support ball to the probe positioning pin at point i; α is the included angle of FLA and the connection line of the two supporting ball centers at point A; β is the included angle of FRA and the connection line of the two supporting ball centers at point A.…”

Section: Mathematical Modeling and Simulationmentioning

confidence: 99%

Performance Evaluation and Compensation Method of Trigger Probes in Measurement Based on the Abbé Principle

Ren

Chen

2020

Sensors

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Trigger probes are widely used in precision manufacturing industries such as coordinate measuring machines (CMM) and high-end computer numerical control(CNC) machine tools for quality control. Their performance and accuracy often determine the measurement results and the quality of the product manufacturing. However, because there is no accurate measurement of the trigger force in different directions of the probe, and no special measuring device to calibrate the characteristic parameters of the probe in traditional measurement methods, it is impossible to exactly compensate for the measurement error caused by the trigger force of the probe in the measurement process. The accuracy of the measurement of the equipment can be improved by abiding by the Abbé principle. Thus, in order to better evaluate the performance parameters of the probe and realize the accurate compensation for its errors, this paper presents a method which can directly measure the performance parameters of the trigger probe based on the Abbé measurement principle, expounds the measurement principle, the establishment of the mathematical model, and the calibration system, and finishes with an experimental verification and measurement uncertainty analysis. The experimental results show that this method can obtain the exact calibration errors of the performance parameters of the trigger probe intuitively, realize the compensation for the errors of the probe in the measurement process, and effectively improve the measurement accuracy.

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Section: Mathematical Modeling and Simulationmentioning

confidence: 99%