Coordinate-Measuring Machine

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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.


References in periodicals archive ?
This is what led us to enhance our ZEISS DuraMax compact coordinate measuring machine," states Mohrle.
Commenting on the report, an analyst from TechNavio's Engineering team said: "Competition in the Global Coordinate Measuring Machine (CMM) market has intensified in the last few years.
The second class of coordinate measuring machines is so-called non-contact CMM.
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In the following weeks Hexagon will start the delivery of locally assembled coordinate measuring machines to Indian customers.
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For this purpose, the scanned and digitized data of the test piece was compared to the measuring data collected by the ZEISS UMC 850[TM] coordinate measuring machine.
com) have teamed their technologies to facilitate inspection of tooling and parts essentially anywhere it is needed by combining the portable coordinate measuring machine (CMM) from Faro with the CAD-based inspection software from Delcam.
Waukesha Kramer performed hundreds of dimensional checks with a portable coordinate measuring machine (PCMM) from Romer CimCore, Farmington Hills, Mich.
A new optical imaging system is said to add high-resolution, non-contact video inspection capabilities to virtually any coordinate measuring machine (CMM) or toolmaker's microscope.
The LBSG was designed specifically for establishing long reference lengths for large coordinate measuring machine performance evaluation.
Windsor, CA 95492 Phone: (707) 838-6272 Fax: (707) 838-3985 Instrumentation: Model 350A automated video coordinate measuring machine provides automatic dimensional measuring of O-rings, gaskets, etc.