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Three-dimensional runout characterisation for rotationally symmetric components Open

Christopher Tompkins, Luke Todhunter, Harald Gottmann, Christoph Rettig, Robert Schmitt , et al. · 2025

Three-Dimensional Runout Characterisation For Rotationally Symmetric Components Open

Christopher Tompkins, Luke Todhunter, Harald Gottmann, Christoph Rettig, Robert Schmitt , et al. · 2024

Rotationally symmetric components are ubiquitous to modern devices, and their precision manufacture is necessary to keep costs and manufacture time down, as well as reduce waste and possibly hazardous component failure. In this paper, a me…

Investigating the variation of particle distribution and surface texture of top surfaces based on build position in laser powder bed fusion Open

Cindy Sithole, Helia Hooshmand, Luke Todhunter, Adam Thompson, Sipke Hoekstra , et al. · 2024

Quality analysis of additively manufactured (AM) surfaces is complex, yet critical for determining the functionality of parts and technology improvement. To accurately assess the quality of AM parts, it is necessary to consider the industr…

Mathematical approach to the validation of form removal surface texture software Open

Luke Todhunter, Richard Leach, François Blateyron · 2020

A new approach to the validation of surface texture form removal methods is introduced. A linear algebra technique is presented that obtains total least squares (TLS) model fits for a continuous mathematical surface definition. This model …

Mathematical approach to the validation of surface texture filtration software Open

Luke Todhunter, Richard Leach, François Blateyron · 2020

A novel method for the validation of surface texture filtration software is introduced. Mathematically traceable reference pairs for linear Gaussian filtration are developed, utilising Fourier series surface definitions in conjunction with…

Mathematical approach to the validation of surface texture form removal software Open

Luke Todhunter, Richard Leach, François Blateyron · 2020

A new approach to the validation of surface texture form removal methods is introduced. A linear algebra technique is presented that obtains total least squares (TLS) model fits for a continuous mathematical surface definition. This model …

Mathematical approach to the validation of surface texture form removal software Open

Luke Todhunter, Richard Leach, François Blateyron · 2020

A new approach to the validation of surface texture form removal methods is introduced. A linear algebra technique is presented that obtains total least squares (TLS) model fits for a continuous mathematical surface definition. This model …

Mathematical approach to the validation of surface texture filtration software Open

Luke Todhunter, Richard Leach, François Blateyron · 2020

A novel method for the validation of surface texture filtration software is introduced. Mathematically traceable reference pairs for linear Gaussian filtration are developed, utilising Fourier series surface definitions in conjunction with…

Mathematical approach to the validation of surface texture filtration software Open

Luke Todhunter, Richard Leach, François Blateyron · 2020

A novel method for the validation of surface texture filtration software is introduced. Mathematically traceable reference pairs for linear Gaussian filtration are developed, utilising Fourier series surface definitions in conjunction with…

Mathematical approach to the validation of field surface texture parameter software Open

Luke Todhunter, Richard Leach, Simon Lawes, P M Harris, François Blateyron · 2020

A new method for performance validation of surface texture parameter calculation software is introduced, focussing on field surface texture parameters. Surface height functions are defined mathematically, either using Fourier series or pol…

Performance Verification of a Flexible Vibration Monitoring System Open

Patrick Bointon, Luke Todhunter, Adam T. Clare, Richard Leach · 2020

The performance of measurement or manufacturing systems in high-precision applications is dependent upon the dynamics of the system, as vibration can be a significant contributor to the measurement uncertainty and process variability. Tech…

Mathematical approach to the validation of functional surface texture parameter software Open

Luke Todhunter, Richard Leach, Simon Lawes, P M Harris, François Blateyron · 2019

A new method for performance validation of surface texture parameter calculation software is introduced, focussing on functional surface texture parameters. Material ratio curves are defined algebraically and used to calculate functional s…

Development of mathematical reference standards for the validation of surface texture parameter calculation software Open

Luke Todhunter, Richard Leach, Simon Lawes, François Blateyron, P M Harris · 2018

A framework for the validation of surface texture parameter calculation software is proposed. The framework utilises mathematically defined surfaces and mathematically calculated surface texture parameter values to produce a reference agai…

A programmable software framework for the generation of simulated surface topography Open

Luke Todhunter, Nicola Senin, Richard Leach, Simon Lawes, François Blateyron , et al. · 2018

A flexible and programmable software framework has been developed that enables the creation of simulated, areal surface topography datasets. The framework allows the creation of surfaces through a layered approach where deterministic topog…

The effects of vibration on fringe projection systems Open

Patrick Bointon, Luke Todhunter, Petros Stavroulakis, Adam T. Clare, Richard Leach · 2018

Mechanical vibration noise is a significant source of error in precision measuring instruments. Errors due to vibration can be detected in measurement signals, and so methods to control mechanical vibration must be considered throughout th…

Development of mathematically-defined surfaces Open

Luke Todhunter, Richard Leach, Simon Lawes, P M Harris, François Blateyron · 2017

New software has been developed that enables the creation of areal surface topography representations. The goal of this software package is to utilise the mathematically-defined surface representations in the development of surface texture…

Algorithms and software for areal surface texture function parameters Open

I. M. Smith, P M Harris, Luke Todhunter, Claudiu Giusca, Xiangqian Jiang , et al. · 2017

Software for the evaluation of areal surface texture function parameters is described. Definitions of the parameters, expressed in terms of the inverse areal material ratio function, are provided along with details of the numerical algorit…

Industrial survey of ISO surface texture parameters Open

Luke Todhunter, Richard Leach, Simon Lawes, François Blateyron · 2017

Results of an industrial survey on the use of surface texture parameters Open

Luke Todhunter, Richard Leach, Simon Lawes · 2017

In 1999, CIRP conducted an industrial survey of the use of surface texture parameters [1]. In the seventeen years since, much has changed, with the most important advancement being the introduction of areal surface texture parameters as de…

An industrial survey on the use of surface texture parameters Open

Luke Todhunter, Richard Leach, Simon Lawes · 2017

In 1999, CIRP conducted an industrial survey of the use of surface texture parameters [1]. In the seventeen years since, much has changed, with the most important advancement being the introduction of areal surface texture parameters as de…

An analysis of type F2 software measurement standards for profile surface texture parameters Open

Luke Todhunter, Richard Leach, Simon Lawes, François Blateyron · 2017

This paper reports on an in-depth analysis of ISO 5436 part 2 type F2 reference software for the calculation of profile surface texture parameters that has been performed on the input, implementation and output results of the reference sof…

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