Coordinate-Measuring Machine

Also found in: Wikipedia.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Instead, TPI has adopted a portable coordinate-measuring machine called the Control Station Pro (CSP), supplied by Faro Industries Inc.
By modifying the Techno router to function as a coordinate-measuring machine, Anderson came up with a better way to get surface data into the CAD system.
SPC data collection implemented via computer software on coordinate-measuring machine and optical comparators.
Inspection equipment includes Mitutoyo coordinate-measuring machine and RAM Optical 6X12 CNC video-inspection system.
Brown & Sharpe Manufacturing Co., North Kingstown, R.I., will debut the Chameleon coordinate-measuring machine that combines single-point measurement and multi-point scanning for fast and accurate dimensional measurements of any type of 3-D part.
Among the new modules, Pro/CMM allows coordinate-measuring machine programs to be created from Pro/Engineer models.
All parts were measured on a Sheffield coordinate-measuring machine (CMM) fitted with a noncontacting laser probe to monitor any deflection.
Buckles adds that the system will work in place of a coordinate-measuring machine in a host of quality-control applications.
Regarding quality-assurance techniques, 64% of the "world-class" group use a coordinate-measuring machine vs.
Prior to his August appointment, the board of the firm--known for its coordinate-measuring machines and their export scandals (see M.I.R.
Supplies automatic measurement gauges as well as coordinate-measuring machines that combine single-point measurement and multi-point scanning.

Full browser ?