Roundness measurement dataset This dataset contains measurement data of roundness reference workpieces. The measurements were performed to test a new developed variable diameter three-point roundness measurement device ROMES by comparing ROMES results to measurement results obtained with a roundness measurement instrument. Measurement with Talyrond roundness measurement instrument Raw measurement data of five roundness reference workpieces measured with Taylor Hobson Talyrond TR31c roundess measurement instrument. Gaussian filter with 15 UPR cutoff according to ISO 12181-2 was applied before calculating the roundness profiles and roundness values. Converted values in .csv format are the displacement values in micrometers 3600 points per revolution. Software to convert measurement data from Talyrond .PLN file format is included in folder pydpack/ Description of Talyrond measurement files Description File name Workpiece 1 roundness data, original Talyrond measurement file talyrond/TK1.PLN Workpiece 1 roundness data, converted displacement values from Talyrond file talyrond/TK1.csv Workpiece 2 roundness data, original Talyrond measurement file talyrond/TK2.PLN Workpiece 2 roundness data, converted displacement values from Talyrond file talyrond/TK2.csv Workpiece 3 roundness data, original Talyrond measurement file talyrond/TK3.PLN Workpiece 3 roundness data, converted displacement values from Talyrond file talyrond/TK3.csv Workpiece 4 roundness data, original Talyrond measurement file talyrond/TK4.PLN Workpiece 4 roundness data, converted displacement values from Talyrond file talyrond/TK4.csv Workpiece 5 roundness data, original Talyrond measurement file talyrond/TK5.PLN Workpiece 5 roundness data, converted displacement values from Talyrond file talyrond/TK5.csv Three-probe measurement Workpieces 1 and 2 were measured with a new three-probe roundness measurement instrument mounted in a lathe. For each measurement, 10 rounds of data with 2500 pulses per revolution were measured. CSV files contain values for index number, S1, S2, S3 and S4 (not used) All tactile probe readings (S1 to S3) will need to be multiplied by 1/409.6 to obtain the displacement in micrometers. Nominal angles of the tactile probes are 0, 49.75 and 88.75 degrees. Description of three-probe measurement files Description File name Three-point tactile measurement of workpiece 1 multiprobe/TK1_threeprobe_1.csv Three-point tactile measurement of workpiece 1, second measurement multiprobe/TK1_threeprobe_2.csv Three-point tactile measurement of workpiece 1 with tapes attached multiprobe/TK1_tapes.csv Three-point tactile measurement of workpiece 2 multiprobe/TK2_threeprobe_1.csv Three-point tactile measurement of workpiece 2, second measurement multiprobe/TK2_threeprobe_2.csv Three-point tactile measurement of workpiece 2 with tapes attached multiprobe/TK2_tapes.csv Acknowledgement This dataset was obtained within the 19ENG07 Met4Wind project. This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union’s Horizon 2020 research and innovation programme. Project title: Metrology for enhanced reliability and efficiency of wind energy systems Funder name: European Commission Funder ID: 10.13039/100014132 Grant number: 19ENG07 Met4Wind Link to project homepage: https://www.ptb.de/empir2020/met4wind/home/