Advertisement

Precision Positioning down to Single Nanometres Based on Micro Harmonic Drive Systems

  • Andreas Staiger
  • Reinhard Degen
Part of the IFIP — International Federation for Information Processing book series (IFIPAICT, volume 260)

Abstract

At present the Micro Harmonic Drive is the world’s smallest backlashfree micro gear. Its favourable properties such as high repeatability, high torque capacity, low mass of inertia and high degree of efficiency are proved applied in different applications for semiconductor manufacturing, measuring machines, aerospace and other industries. However for high precise assembly applications often linear adjustments of a few nanometres are required. The common solution for positioning in the nanometres range is the use of piezoelectric effect actuators. The drawbacks are the need for a closed loop control system, overshooting during positioning, local wear, short travel ranges and loss of position without power supply. To overcome these obstacles the advantages of the Micro Harmonic Drive are exploited together with a stepper motor, an eccentric drive and monolithic flexure hinges are combined in a compact unit, called Nanostage. With this setup a travel range of 40 microns and a resolution < 3 nm is achieved. The single sided and double sided repeatability was measured in an open loop control system with < 5 nm and < 10 nm respectively.

Keywords

Stepper Motor Leaf Spring Closed Loop Control System Flexure Hinge Harmonic Drive 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    J. Hesselbach and A. Raatz, mikroPRO — Untersuchung zum international Stand der Mikroproduktionstechnik (Vulkan Verlag, Essen, 2002).Google Scholar
  2. 2.
    R. Degen and R. Slatter, High Speed And Low Weight Micro Actuators For High Precision Assembly Applications, Proceedings of IPAS, Bad Gastein (2006).Google Scholar
  3. 3.
    C. Thürigen, W. Ehrfeld, B. Hagemann, H. Lehr and F. Michel, Development, fabrication and testing of a multiple-stage micro gear system, (Proceedings of Tribology issues and opportunities in MEMS, Columbus (OH), (Kluwer Academic Publishers, Dordrecht, 1998) pp. 397–402.Google Scholar
  4. 4.
    S. Kleen, W. Ehrfeld, F. Michel, M. Niehaus and H.-D. Stölting, Ultraflache Motoren im Pfennigformat, F&M, Vol. 108, No. 4, (Carl Hanser Verlag, München, 2002).Google Scholar
  5. 5.
    R. Degen and R. Slatter, Hollow shaft micro servo actuators realized with the Micro Harmonic Drive, Proceedings of Actuator, Bremen (2002).Google Scholar
  6. 6.
    R. Slatter, R. Degen and A. Burisch, Micro Mechatronic Actuators for Desktop Factory Applications, Proceedings of the Joint Conf. on Robotics, München (2006).Google Scholar
  7. 7.
    S.T. Smith and D.G. Chetwynd, Foundations of Ultraprecision Mechanism Design (Taylor & Francis Books Ltd, London, 1998).Google Scholar
  8. 8.
    A.H. Slocum, Precision Machine Design (Society of Manufacturing Engineers, Dearborn (MI), 1992).Google Scholar

Copyright information

© International Federation for Information Processing 2008

Authors and Affiliations

  • Andreas Staiger
    • 1
  • Reinhard Degen
    • 1
  1. 1.Micromotion GmbHMainzGermany

Personalised recommendations