Determination of a movable gantry position including a dual measurement module
US6949733B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2003 |
| Grant date | Sep 27, 2005 |
| Priority date | — |
| Expiry date | Feb 5, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50389
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The position of a working point relative to a working space, such as a working point of a carriage on a gantry beam of an XY positioning table, is determined by measuring at least two sets of displacements. A first set of displacements, of the working point relative to an intermediate component, such as the gantry beam, includes a relatively large displacement (X) in a first linear degree of freedom and relatively small displacements (Y1′, Y2′), in at least two of the five degrees of freedom other than the first. The second set of displacements, of the intermediate component relative to the working space, includes a relatively large displacement (Y1, Y2), in a second linear degree of freedom, and relatively small displacements (X1′, X2′), in at least two of the five degrees of freedom other than the second.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.