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Grinding Machine - ChestofBooks By means of the grinding machine, parts may be economically finished, even in .... 46 is suited for work on rough castings, as in the cleaning room of a foundry. How I built an edge grinder for telescope mirror blanks.
The mirror was final-ground with a precise but incorrect curvature. The result was spherical aberration in the mirror/lens assembly. As part of its fact-finding, a team of investigators eventually went back to the mirror-grinding facility. Even though it had been closed for many years, they found the test room, the measurement rod, and even