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1

Determination of the influence of calibration sphere parameters on the results of articulating probe head qualification

Gruza Maciej, Gąska Adam, Gąska Piotr, Harmatys Wiktor, Sładek Jerzy

Advances in Science and Technology. Research Journal

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2018

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Vol. 12, no 2

252--259

EN

The qualification of probe heads before the measurements performed with their usage is now a standard procedure. It is used for correction of probe head’s and measuring tip systematic errors. The calibration sphere, which is used for this process, should have adequately small form errors. However, it is not always possible to use a highly accurate spheres and it is a common practice to use a sphere that was provided by the manufacturer of the CMM for a long time. This is why, the authors have tried to answer the question about the impact of the calibration sphere inaccuracies on the results of probe head qualification process.

2

Assessment of impact of stylus length on measurement accuracy for 5-axis coordinate measuring systems

Gąska P., Gąska A., Gruza M., Ostrowska K., Sładek J.

Mechanik

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2017

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R. 90, nr 11

1027--1029

PL

Długość trzpienia wykorzystywanego w trakcie pomiarów na współrzędnościowych maszynach pomiarowych należy do ważnych czynników oddziałujących na dokładność pomiaru. Autorzy postanowili sprawdzić, jaki wpływ ma na pomiary przeprowadzane w trybie 5-osiowym, w którym specjalna głowica obrotowo-uchylna pozwala na wykorzystanie 2 ruchów obrotowych w trakcie pomiaru. Badania oparto na znanej metodyce obejmującej pomiar obiektów wzorcowych. Oszacowano wpływ długości trzpienia na dokładność tego rodzaju pomiarów oraz przedstawiono wnioski.

EN

Length of stylus used during measurements performed on CMMs is one of the important factors which affect their accuracy. Authors decided to investigate how this factor affects the measurement done in 5-axis mode when articulated probe head is used for adding 2 supplementary rotary movements during measurements. Described research utilize well-known methodology based on measurement of material standards. The impact of the stylus length on obtained results was estimated and conclusions were drawn.

3

Assessment of the impact of probe head hysteresis on the accuracy of five-axis coordinate measuring systems

Gąska P., Gruza M., Gąska A., Harmatys W., Sładek J.

Advances in Science and Technology. Research Journal

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2017

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Vol. 11, no 3

277-282

EN

One of the factors affecting the accuracy of Coordinate Measuring Systems is hysteresis of a probe head. It is important especially in case of touch trigger probes and should be taken into account during the determination of probing strategy. In this article, the authors try to assess how this phenomenon affects the accuracy of five axis coordinate systems which utilize articulating probe head. Such systems allow to measure point coordinates using rotary movements of the head what introduces changes to the probing process. The experiments presented in this paper are based on multiple measurements of the reference elements such as gauge blocks and standard ring.

4

Analysis of measured workpiece’s form errors influence on the accuracy of probe heads used on five-axis measuring systems

Harmatys W., Gąska A., Gruza M., Gąska P., Sładek J.

Advances in Science and Technology. Research Journal

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2017

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Vol. 11, no 4

305--310

EN

The five-axis measuring systems are one of the most modern inventions in coordinate measuring technique. They are capable of performing measurements using only the rotary pairs present in their kinematic structure. This possibility is very useful because it may cause significant reduction of total measurement time and costs. However, it was noted that high values of measured workpiece’s form errors may cause significant reduction of the accuracy of a five-axis measuring system. The investigation on the relation between these two parameters was conducted in this paper and possible reasons of decrease in measurement accuracy was discussed on the example of measurements of workpieces with form errors ranging from 0,5 to 1,7 millimetre.