Abstract
This article describes the design, analysis, and performance of a flatness inspection instrument to measure workpieces with up to 1 mm departure from flatness. The instrument uses two air bearing spindles arranged with parallel axes to simultaneously rotate a workpiece and slowly pass a capacitance probe over the spinning surface. Capacitance probes offer user-selectable sensitivity to provide multiple combinations of measurement range and resolution. In tests with a high sensitivity probe, the instrument demonstrated measurement repeatability of 25 nm on a ø75 mm workpiece. This article presents a complete homogeneous transformation matrix analysis of the propagation of errors into the measurement as well as sample measurements on diamond turned workpieces.
Original language | English (US) |
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Article number | 025105 |
Journal | Review of Scientific Instruments |
Volume | 77 |
Issue number | 2 |
DOIs | |
State | Published - 2006 |
All Science Journal Classification (ASJC) codes
- Instrumentation