Commissioning of the first Precessions 1.2m CNC Polishing Machines for Large Optics

D. D. Walker, A. T.H. Beaucamp, V. Doubrovski, C. Dunn, R. Evans, R. Freeman, G. McCavana, R. Morton, D. Riley, J. Simms, G. Yu, X. Wei

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

15 Citations (Scopus)


This paper reports on the commissioning of the first of Zeeko's 'IRP1200' 1.2m capacity 7-axis automated CNC polishing machines. These combo machines now support five different removal regimes, which are described. The machines differ substantially from Zeeko's more familiar 200mm machines on which we have focused before, in terms of overall architecture and detailed design. Large and small optics place different demands on part-fixturing, tooling, machine speeds and accelerations, metrology, slurry-handling, part-loading and access etc. These have had a profound effect on the development-path from 200 to 1.2m machines. Moreover, an advance in the kinematic design has extended the allowable range of surface slope-angles from typically 30° up to a hemisphere. The paper presents results from the pass-off trials, the first fluid-jet experiment, and the development of tooling to address a requirement to smooth a part with a local defect.

Original languageEnglish
Title of host publicationCurrent Developments in Lens Design and Optical Engineering VII
EditorsPantazis Z. Mouroulis, Warren J. Smith, R. Barry Johnson
Number of pages8
ISBN (Print)9780819463678, 0819463671
Publication statusPublished - 31 Aug 2006
Externally publishedYes
EventSPIE Optics and Photonics - San Diego, United States
Duration: 13 Aug 200617 Aug 2006
Conference number: 7

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSPIE Optics and Photonics
Country/TerritoryUnited States
CitySan Diego


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