Development of a PC-based control system for a five-axis ultraprecision micromilling machine ‘Ultra-Mill’ and its performance assessment

Abstract

In the realm of micro- and nanomachining, high-precision three-dimensional miniaturized components and microstructures from an extensive range of engineering materials are increasingly required in industries such as optics, automotive, medical, aerospace, and defence. Five-axis ultraprecision micromilling machines are essential for manufacturing components and microstructures for these industries. This paper presents the design and development of the control system for a five-axis ultraprecision micromillling machine – Ultra-Mill – and its performance assessment based on two application case studies. The design specifications of Ultra-Mill are based on motion and positioning accuracy, dynamic stiffness, thermal stability, and online monitoring and inspection requirements, which are heavily dependent on the control system for the micromilling machine and associated micromilling processes. The implementation and application perspectives of the control system are therefore presented in relation to the ultraprecision and micro/nano feature capability of the machine and process, including controller dynamics, driver and actuation dynamics, feedback dynamics, online inspection and monitoring, and software dynamics.

Keywords

control system design ultraprecision machine tool five-axis micromilling machine PC-based control system

References

Ehmann

K. F.

Bourell

Culpepper

M. L.

Hodgson

T. J.

Kurfess

T. R.

Madou

Rajurkar

De Vor

R. E.

International assessment of research and development in micromanufacturing. World Technology Evaluation Centre (WTEC) Report, Baltimore, Maryland, 2005

Liu

DeVor

R. E.

Kapoor

S. G.

Ehmann

K. F.

The mechanics of machining at the microscale: Assessment of the current state of the science. Trans ASME, J. Mfg Sci. Engng 2004, 126 (4), 666–678

Chae

Park

S. S.

Freiheit

Investigation of micro-cutting operations. Int. J. Mach. Tools Mf. 2006, 46 (3–4), 313–332

Filiz

Conley

C. M.

Wasserman

M. B.

Ozdoganlar

O. B.

An experimental investigation of micro-machinability of copper 101 using tungsten carbide micro-endmills. Int. J. Mach. Tools Mf. 2007, 47 (7–8), 1088–1100

Fanuc Ltd, information available from http://www.fanuc.co.jp/en/product/robonano/index.htm/ (access date 9 September 2009)

World Technology Evaluation Center (WTEC) . International assessment of research and development in micromanufacturing report, available from http://www.wtec.org/reports.htm (access date 11 September 2009)

Takeuchi

Yonekura

Sawada

Creation of 3-D tiny statue by 5-axis control ultraprecision machining. CAD 2003, 35 (4), 403–409

Ultra-Mill product brochure, Brunel University, Uxbridge, UK, 2009

Kugler GmbH , information available from http://www.kugler-precision.com/ (access date 9 September 2009)

10.

Moore Nanotechnology Systems, information available from http://www.nanotechsys.com/ (access date 9 September 2009)

11.

Precitech, Inc. , information available from http://www.precitech.com/ (access date 9 September 2009)

12.

Kugler GmbH , information available from http://www.kugler-precision.com/ (access date 9 September 2009)

13.

Nor

M. K. M.

Huo

Cheng

A PC-based control system for multiple-axis micro/nano machining: Control architecture and implementations. In Proceedings of the 8th International Conference LAMDAMAP 26–28 June 2007 Cardiff, UK 289–298

14.

15.

Aerotech , information available from http://www.aero-tech.com/products/controllers/motion_controllers.html (access date 9 September 2009)

16.

Delta Tau , information available from http://www.delta-tau.com (access date 18 July 2009)

17.

PMC , information available from http://www.pmccorp.com/ (access date 18 July 2009)

18.

Mitsubishi , information available from http://www.mitsubishielectric.com/ (access date 18 July 2009)

19.

GE Fanuc , information available from http://www.fanuc.co.jp/en/product/cnc/15i150i/ (access date 18 July 2009)

20.

Siemens , information available from http://www.siemens.com (access date 18 July 2009)

21.

MASMICRO , information available from http://www.masmicro.net/ (access date 18 July 2009)

22.

Asato

O. L.

Karo

E. R. R.

Porto

R. Y. V.

Analysis of open CNC architecture for machine tools. J. Bras. Soc. Mech. Sci. 2002, 24 (3), 208–212

23.

Ikawa

Donaldson

R. R.

Kormanduri

König

Aachen

T. H.

Mckeown

P. A.

Moriwaki

Stowers

I. F.

Ultraprecision metal cutting – the past, the present and the future. Ann. CIRP 1991, 40 (2), 587–594

24.

Gee

The how's and why's of PC based control. In IEEE Trans. Pulp and Paper Ind. Tech. Conference 2001, 67–74

25.

Wilson

Control requirement for high-precision, high-speed machining. Delta Tau Data Systems, Inc., 2004

26.

Schmidt

Heinzl

Brandenburg

Control approaches for high-precision machine tools with air bearings. IEEE Trans. Ind. Electronics 1999, 6 (5), 979–989

27.

Schmidt

A comparison of control strategies for feed-drive system of ultraprecision machine tools – effects of frictionless air bearings 1997, vol. 1 In Proceedings of International Conference on Power electronics and drive systems 262–269

28.

Weidner

Quickel

High speed machining with linear motors. Mfg Engng 1999, 122 (3), 80–87

29.

Nor

M. K. M.

Development of the UMAC-based control system with applications to a 5-axis ultraprecision micromilling machine PhD Thesis, Brunel University, Uxbridge, UK, 2009

30.