Keeping Large Machines On Track  

Oleh:

Eidelberg, DR.Boaz

Jenis: Article from Bulletin/Magazine - ilmiah internasional
Dalam koleksi: Machine Design (Soft Copy ada dalam http://search.proquest.com/) vol. 82 no. 14 (Aug. 2010), page 48-52.
Topik: Coordinate Transformation; Metrology errors

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Perpustakaan Pusat (Semanggi) Nomor Panggil: MM44.62 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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It's challenge to design a positioning system that's highly accurate. But the is even more problematic if there are big distances involved. When the size of the work exceeds 1 m, angular errors become amplified in three dimensions at a rate of 5 µm/arc-sec/m. These angular errors combine with other linear errors to create an overall 3 D error. In addition, the accumulation of 3D errors expands with the number of positioning axes, whether they are atages or tables.

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