13 February 1987 Theoretical Aspects And Practical Considerations In The Application Of Cnc To The Spherical Generator
Author Affiliations +
Abstract
In response to a broad expression of customer interest, Rogers and Clarke Manufacturing Company has recently developed its first-generation CNC spherical generator. This paper presents some theoretical aspects of the design, and some of the obstacles we had to ad-dress. The fundamentals of manual generator setups are well known. The only mathematics involved was to solve a simple equation for the generator head angle, given the rough cutting diameter of the cup wheel, and the work radius to be achieved. Subsequent "cut and try" refinement of the setup is normally an "art" unsullied by mathematical analysis. But the computer requires more precise instruction. Our theoretical considerations, mathematical models, and applications experience are discussed. With the factor of diamond wheel radius wear, it is not possible to finish every lens with computer control. Therefore, the operator of a Rogers and Clarke CNC Spherical Generator has the availability of manual controls for individual machine functions. CNC Spherical Generators are designed specifically for the shop with numerous short runs and perhaps a low diamond wheel inventory. The computer controls system permits much faster setup times, particularly for less experienced operators.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fred W Clarke, Hendley W Hall, "Theoretical Aspects And Practical Considerations In The Application Of Cnc To The Spherical Generator", Proc. SPIE 0676, Ultraprecision Machining and Automated Fabrication of Optics, (13 February 1987); doi: 10.1117/12.939512; https://doi.org/10.1117/12.939512
PROCEEDINGS
5 PAGES


SHARE
RELATED CONTENT

Slidestore: A Progress Report
Proceedings of SPIE (January 01 1983)
In-Process Measurement Of Optical Surfaces
Proceedings of SPIE (February 13 1987)
Further Developments Of Diamond Smoothing Techniques
Proceedings of SPIE (October 14 1977)
Lathe For Generation Of Aspherical Surfaces Of Revolution
Proceedings of SPIE (December 09 1983)
A novel ultra-precision turning method of aspheric surface
Proceedings of SPIE (October 06 2010)
Evolution Of A Numerically Controlled Diamond Turning System
Proceedings of SPIE (October 27 1978)

Back to Top