Detecting 6 DoF geometrical errors of rotary tables

Kniel, Karin; Franke, Matthias; Härtig, Frank; Keller, Frank; Stein, Martin

doi:10.1016/j.measurement.2019.107366

Cited by 12 publications

(11 citation statements)

References 7 publications

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“…Figure 9 is the block diagram of the installation structure for angle calibration. When performing angle calibration, the shaft of the test loading mechanism needs to be connected to the motion system, and a suitable calibration connector is required [6] . A circular grating encoder to be tested (including the circular grating disc, which is installed under the loading mechanism and rotates synchronously with the motion system, grating reading head, etc.)…”

Section: Analysis Of Influence Of Flexible Deformation On Index Angle...mentioning

confidence: 99%

Analysis of Error Sources of a Torque and Rotation Angle Calibration Unit Based on Statics

Zhao,

Wang,

Shou

et al. 2023

J. Phys.: Conf. Ser.

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The structure and working principle of the torque calibration unit, the index angle calibration unit, and the loading mechanism are introduced. Using finite element analysis tools for static analysis, the error sources of the calibration process are obtained and the influence on the calibration results is analyzed. Among them, the influence of connecting rod deformation, torque transmission characteristics, and flexible deformation on the calibration accuracy is small and can be ignored. Bearing friction, coaxiality, and micro-deformation of the test bench are inherent errors of the system. For its own inherent error attribute, it will not affect the relationship between the sensor to be calibrated and the standard sensor on the output shaft of the index test bench, that is, it will not affect the calibration process of the sensor to be calibrated later.

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Section: Analysis Of Influence Of Flexible Deformation On Index Angle...mentioning

confidence: 99%

Analysis of Error Sources of a Torque and Rotation Angle Calibration Unit Based on Statics

Zhao,

Wang,

Shou

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…However, this method is only capable of identifying two of the six error motion components assigned to rotary axes. The procedure presented in [7] uses the so-called three-rosette method applied to a circular ball plate and provides all six error motion components. The resolution of the errors obtained (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…the angular step size), however, depends on the design of the ball plate. The ball plate used in [7] is equipped with 12 equally distributed spheres and therefore yields error motions with a step size of 30 • . This may be unsatisfactory if the results are to be used, for example, for compensation of gear measurements, as large parts of the compensation data must be calculated by means of interpolation [8,9].…”

Section: Introductionmentioning

confidence: 99%

A reduced self-calibrating method for rotary table error motions

Keller

Stein²

2023

Meas. Sci. Technol.

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A novel method for the determination of rotary table errors in six degrees of freedom on coordinate measuring machines or machine tools is introduced. The method is based on the measurement of an uncalibrated circular ball plate in different rotational positions on the rotary table, also referred to as the three-rosette method. The novel procedure allows to reduce the number of measurement positions significantly compared to the complete three-rosette method whereas the measurement uncertainty still remains sufficiently small. The method relies on error separation and is self-calibrating which means that no external reference is required. The sophisticated design of a new ball plate allows to determine the rotary table errors in angular steps of only 5°.

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“…Spheres A and B, which were at an identical radius, were approximately located diametrically opposite each other and at different heights concerning each other. Many previous studies have shown that six parametric errors could be analyzed using ball plate artifacts [24][25][26][27][28]. The ball plate artifacts contained seven balls or twelve balls.…”

Section: Introductionmentioning

confidence: 99%

A Hole Plate for Measuring Parametric and Volumetric Errors of a Four-Axis Coordinate Measuring Machine

Hsieh¹,

Lin²,

Yeh³

2023

Preprint

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Recently, a four-axis coordinate measuring machine, which consists of three linear axes and a single rotary axis, has been more widely used than a traditional three-axis coordinate measuring machine. The volumetric error influences the accuracy of the four-axis coordinate measuring machine. 27 parametric errors contribute to the volumetric error. This study proposes a new methodology to analyze the parametric and volumetric error of the four-axis coordinate measuring machine using a hole plate. First, the hole plate setup sequentially in three different planes. We measured the hole plate by using five different styluses. Second, 27 parametric errors were analyzed using the coordinate deviations. The volumetric error was constructed using the homogeneous transform matrixes. The volumetric error ranges were from 0.35 µm to 1.55 µm and from 0.35 µm to 2.83 µm without and with the single rotary axis. Third, three commercial instruments, namely a laser interferometer, an autocollimator, and a polygon-autocollimator, were used to validate the proposed methodology to verify the measured parametric errors. The absolute maximum differences, compared with the laser interferometer for three parametric positioning errors and the autocollimator for six parametric rotational errors for the three linear axes, were 0.56 µm and 0.54", respectively. Moreover, the absolute maximum difference of one parametric positioning error for the single rotary axis, comparing with the polygon-autocollimator, was 0.75". The En-values were 0.27, 0.54, and 0.27, respectively. The results demonstrate the proposed methodology's effectiveness and reliability to the industry's four-axis coordinate measuring machines.

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Detecting 6 DoF geometrical errors of rotary tables

Cited by 12 publications

References 7 publications

Analysis of Error Sources of a Torque and Rotation Angle Calibration Unit Based on Statics

Analysis of Error Sources of a Torque and Rotation Angle Calibration Unit Based on Statics

A reduced self-calibrating method for rotary table error motions

A Hole Plate for Measuring Parametric and Volumetric Errors of a Four-Axis Coordinate Measuring Machine

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