Coordinate-Measuring Machine

(redirected from Coordinate measuring machine)
Also found in: Acronyms.

Coordinate-Measuring Machine

 

in astronomy, an instrument for measuring the rectangular coordinates of celestial objects on astrophotographs. Coordinate-measuring machines were first used in the late 19th century as photographic astrometry developed.

It is possible to compute the celestial coordinates of the object under study on the astrophotograph by using the machine to measure the rectangular coordinates of the images of several reference stars with known celestial coordinates and the coordinates of the object. Coordinate-measuring machines are designed to measure one coordinate or two mutually perpendicular coordinates. Semiautomatic coordinate-measuring machines were developed in the 1960’s in which the fixing onto the objects to be measured is done by the experimenter and the reading is taken automatically and recorded on punched card or punched tape. In 1970, British engineers built the first industrial automatic coordinate-measuring machine (a photoelectric measuring machine). When integrated with a computer, this machine makes it possible to automate completely the measurement process; the entire system is called Galaxy. The accuracy of measurements done by modern coordinate-measuring machines after investigation and consideration of all instrument errors is ±0.5 μ. In the USSR, industrial production of coordinate-measuring machines was begun in the 1930’s at the Leningrad Optical Machine Plant. The semiautomatic coordinate-measuring machine manufactured by the Carl Zeiss Company (German Democratic Republic) is common.

E. A. IUROV

References in periodicals archive ?
Products include 3D machine vision solutions, robot guidance, coordinate measuring machines, laser scanning, and advanced analysis software.
Identification and Adaptive Control of a Coordinate Measuring Machine, Linkoping
Instrumentation: Automated video coordinate measuring machine provides automatic dimensional measuring of o-rings, gaskets, etc.
the MAGnum is a fully DCC controlled coordinate measuring machine designed to come fully configured with no programming required.
Comparison of different artefacts for interim coordinate measuring machine checking: a report from the Swiss Standards Committee", Precision Engineering, Vol.
com/research/lz7kzn/global_coordinate) has announced the addition of the "Global Coordinate Measuring Machine Market 2011-2015" report to their offering.
Tenders are invited for public invitation to tender for the delivery of a 3d coordinate measuring machine with instruction for the robert bosch school of the city of ulm to vol / a
Italian Coordinate Measuring Machine manufacturer COORD3 has released its 2013 CMM model range offering improved measuring performances.
05 Ra, the SFP1 surface finish probe makes Renishaw's coordinate measuring machine a "single platform" metrology system, the company says.
Ontario-headquartered Staveley Services provides nondestructive testing (NDT), test & measurement equipment calibration and coordinate measuring machine (CMM) dimensional inspection services.
Because of an increase in orders from the aerospace sector, Attwater has also invested in a Tessa Microhite coordinate measuring machine.
The Leica LTD709 offers a measurement range of up to 9m (30ft) for Portable Coordinate Measuring Machine (PCMM) applications, which is an increase of 25 percent over the model it replaces.