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Proceedings Paper

Commissioning of the first Precessions 1.2m CNC polishing machines for large optics
Author(s): 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
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Paper Abstract

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.

Paper Details

Date Published: 31 August 2006
PDF: 8 pages
Proc. SPIE 6288, Current Developments in Lens Design and Optical Engineering VII, 62880P (31 August 2006); doi: 10.1117/12.684091
Show Author Affiliations
D. D. Walker, Univ. College London (United Kingdom)
Zeeko Ltd. (United Kingdom)
A. T. H. Beaucamp, Zeeko Ltd. (United Kingdom)
V. Doubrovski, Zeeko Ltd. (United Kingdom)
C. Dunn, Univ. College London (United Kingdom)
R. Evans, Univ. College London (United Kingdom)
R. Freeman, Zeeko Ltd. (United Kingdom)
G. McCavana, Zeeko Ltd. (United Kingdom)
R. Morton, Zeeko Ltd. (United Kingdom)
D. Riley, Zeeko Ltd. (United Kingdom)
J. Simms, Zeeko Ltd. (United Kingdom)
G. Yu, Univ. College London (United Kingdom)
X. Wei, Zeeko Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 6288:
Current Developments in Lens Design and Optical Engineering VII
Pantazis Z. Mouroulis; Warren J. Smith; R. Barry Johnson, Editor(s)

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