Dimensional Metrology Program MEL Metrology Support for Laser
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Dimensional Metrology Program MEL Metrology Support for Laser Trackers and Scanners • Supports Industrial Innovation • High leverage through ANSI / ISO standards • Provides unique calibration facility to industry Steve Phillips Program Manager Dimensional Metrology
Laser Trackers: Coordinate Measuring Machines Using Spherical Coordinates R Vertical Axis Z z Y f x q y Horizontal Axis X Dimensional Metrology
Laser Trackers: Optics Link the Workpiece & CMM • Allows large measurement volumes • Bring the tracker to the workpiece • Lower capital costs than large conventional CMMs • Factory can be reconfigured Dimensional Metrology
Background • MEL invents the laser tracker in 1987 • Commercial trackers available since 1988 but are slow and difficult • By 2000, advances in optoelectronics allow LIDAR type range sensor greatly expanding tracker use • Trackers rapidly displace “total stations” in large scale manufacturing • 2000 DMP starts laser tracker standards effort and begins metrology infrastructure development Dimensional Metrology
Background • 2006 DMP lead effort completes the world’s first laser tracker standard • 2007 DMP provides first distance ranging test for laser tracers Data showing stability better than 1 10 -7 at 61 m +MPE Dimensional Metrology MPE Test result of customer laser ranging system passing the manufacturer’s specification
Recent Developments 2009: DMP provides volumetric performance calibrations per B 89. 4. 19 Dimensional Metrology
Recent Developments 2009: Calibration Results have yielded significant improvements in two major US laser tracker manufacturers Volumetric errors of a tracker per B 89. 4. 19 Parametric error analysis of a tracker Dimensional Metrology First principles analysis describes tracker errors in detail
Recent Developments 2009: Noncooperative target range for laser scanners supplies insights for US manufacturers Photon scanner Noncooperative target range Dimensional Metrology FARO R&D staff testing Photon scanner
Recent Developments 2010: US lead effort to develop ISO standard for laser tracker systems 2010: 1 D high accuracy artifact calibration instrument to be completed providing practical access to calibrated artifacts for laser trackers Dimensional Metrology
Q&A Disclaimer: Data on commercial products are only provided for the sake of describing experimental results. NIST does not endorse or recommend any commercial products or imply that this equipment is the best for any particular application. Dimensional Metrology
