Monday 7th June 2021

euspen’s 2021 extensive tutorial programme will cover a range of key topics for the precision engineer

Whilst covering a clear technical curriculum, tutorials are less formal than a lecture; providing more personalised learning in a social atmosphere.
They incorporate existing challenges in the workplace which cover conceptual theories through to best practice applications.
These tutorials will take place virtually on Monday 7th June 2021.

T3 Optical Metrology for Precision Engineers
T4 Passive Damping in Mechatronics Systems by means of Polymers

Tutorial 3: Optical Metrology for Precision Engineers 

 7th June 2021
Time: 09:30 – 16:00 (CEST)

The tutor is Dr Peter de Groot, Zygo Corporation

This is a fast-paced, comprehensive optics course for precision engineers, with an emphasis on the principles and applications of non-contact instruments for dimensional metrology. We begin with basic geometrical optics of lenses and mirrors, moving up to common optical tools such as telescopes, autocollimators, fringe projection systems, alignment scopes, conventional and confocal microscopes, machine vision, and systems based on focus and triangulation. We then tackle dimensional metrology applications that make use of the wave nature of light, including diffraction, interference, and holography.  This provides the foundation for distance-measuring interferometers and optical encoders, laser Fizeau interferometers for optical surfaces such as lenses and mirrors, and interference microscopes for surface structure analysis. Hot topics include the latest performance enhancements, new instrument designs, vibration robustness, accommodation of highly sloped surfaces, metrology for additive manufacturing, and the analysis of transparent surface films.

Learning outcomes: By the end of the course, you will have greater confidence in the selection, invention and evaluation of optical metrology solutions for practical applications in precision engineering and manufacturing.

Intended audience: This is a beginning to intermediate level course, with material ranging from basic to complex, to provide both an overview and reference for further study.  The intended audience is engineers, scientists and measurement specialists interested in gaining a greater understanding of the operating principles and best practice use of advanced optical instrumentation.

Peter de Groot is a Physics PhD specializing in applied optics, with experience in both industrial and academic environments. As a scientist in optical metrology, Peter has published 180 technical papers and book chapters in the fields of physics, optical testing, surface structure analysis, semiconductor wafer process metrology, stage motion measurement, international standards for metrology, and large-scale coordinate measurement. His research has led to 140 US patents and several commercial products. He is a Fellow of the SPIE, the Optical Society of America, the Institute of Physics, and the International Academy of Engineering Technology. Dr. de Groot is an Honorary Professor at the University of Nottingham, and an experience teacher and presenter of professional short courses.

Tutorial 4: Passive Damping in Mechatronics Systems by Means of Polymers

  7th June 2021
Time: 08:30 – 17:30 (CEST)

The tutors are Dr Ir. Ing. Theo Ruijl & Ir. Ing. Pieter Wullms,  Mi-Partners

Specifications on the dynamic position stability of systems become increasingly tighter. Damping is a very effective and robust way to improve the dynamic behaviour. This can either be done in an active (e.g. feedback control) or in a passive manner. In several applications, passive damping can be considered as an excellent alternative to active damping, or can even be an addition to active systems to suppress resonances which limit the controller bandwidth and to increase the robustness of the system.

The focus of the course is on viscoelastic material damping, on the reason of simplicity, cost and robustness compared to other passive damping principles.

Viscoelastic materials are applied in the past in various applications to achieve damping, however in many of these applications the precise performance is less critical and often by ‘trial and error’ the design is realized. In our high-end performance applications, the complexity, requirements and conditions are such that extensive modelling is necessary and predictability of the final performance is crucial for a successful design of the entire system. The tutorial  focusses on visco-elastic material properties, modelling and designing with viscoelastic materials in a predictable manner.

Tutorial subjects:

  • Understanding the dynamic behaviour of viscoelastic material (frequency and temperature dependence)
  • Material characterization and modelling of viscoelastic materials dynamically
  • Dynamic system modelling with viscoelastic materials
  • Modelling damping by means of the energy method
  • The design and application of damped tuned mass dampers
  • Examples by means of several cases: high and low frequency applications
  • During the course the participant will be actively involved by means of example cases (hand calculations need to be done)
  • Several example materials and designs will be shown.

Learning outcomes:

The course covers the basics on visco-elastic material properties, relevant for damping applications in mechatronic systems. It  offers the participant a methodology for designing with visco-elastic materials, in a predictable manner on system- and on component-level.

Intended audience:

The tutorial is aimed at engineers and physicists, dealing with vibrations and resonances in precision machine design and seeking passive damping solutions by means of polymers. The emphasis of the tutorial is to apply passive damping with visco-elastic materials in a predictable manner, to significantly improve dynamic system performance.

Dr Ir. Ing. Theo Ruijl (born 1967)

Theo Ruijl studied Mechanical Engineering in Eindhoven (The Netherlands) receiving his MSc in Tribology in 1994. Within the Mechatronics Department at Philips Research he made his Ph.D. on the design of an Ultra Precision CMM.

For more than 20 years he is active in de development of high-end mechatronic systems for all kind of precision application e.g. in the semi-conductor, scientific and medical industry.

Theo is a member of the Euspen Council, where he co-initiated in 2006 the Special Interest Group of Thermal Effects in Mechatronics Systems, and a member of the ASPE College of Fellows.

After working at FEI Electron Optics, the joined in 2010 Mi-Partners, a Dutch engineering company in Eindhoven, focusing on mechatronic development, where he holds the role of CTO. Since the beginning of joining Mi-Partners, he initiated the competence of passive damping with polymers. Several projects has be done successfully since then, showing that this technology can be used in high-end mechatronic applications in a systematic and predictable approach..

Theo teaches over 20 years several classes in the field of Mechatronics Systems Design: tutorials and technical courses at universities related to Dynamics & Control, Thermal, Metrology, and Damping with Polymers.

Ir. Ing. Pieter Wullms (born 1985)

Pieter Wullms studied Mechanical Engineering in Eindhoven (The Netherlands) receiving his MSc in Mechanical Engineering in 2011.

After finishing his Master thesis at MI-Partners, he joined the company in 2011, where he holds the position of mechatronic system designer. Since a 2016 Pieter also leads the Passive Damping Competence at MI- Partners.

He has been involved in various training activities related to damping with polymers.

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