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A coordinate-measuring machine (CMM) is a device that measures the geometry of physical objects by sensing discrete points on the surface of the object with a probe. Various types of probes are used in CMMs, the most common being mechanical and laser sensors, though optical and white light sensors do exist.
Cylindrical coordinate measuring machine or CCMM, is a special variation of a standard coordinate measuring machine (CMM) which incorporates a moving table to rotate the part relative to the probe. The probe moves perpendicular to the part axis and radial data is collected at regular angular intervals.
A ROMER Arm is a term for a portable coordinate measuring machine ROMER, a company Acquired by the Hexagon AB group, and part of the Manufacturing Intelligence division, designed the ROMER arm in the 1980s to solve the problem of how to measure large objects such as airplanes and car bodies without moving them to a dedicated measuring laboratory.
Modern measurement equipment includes hand tools, CMMs (coordinate-measuring machines), machine vision systems, laser trackers, and optical comparators.A CMM is based on CNC technology to automate measurement of Cartesian coordinates using a touch probe, contact scanning probe, or non-contact sensor.
The development of precision probes dates back to the 1920s with different mechanical touch devices, but significant advancements came with the advent of Coordinate Measuring Machines (CMM) in the late 1950s. This led to the creation of contact and non-contact probes, including mechanical triggers and scanning probes, as well as laser and ...
Coordinate-measuring machine, a device for dimensional measuring; Coordinated management of meaning, a communications theory; Cybersecurity maturity model, a type of maturity model; C--, also pronounced Cmm, a programming language
[2] [6] [verification needed] [better source needed] Thus the user might measure a block of metal and come away with a width of 208.92 mm when the true width is 208.91 mm, a difference that matters to the subsequent machining.
The very first uses for these machines was the inspection of gauges and parts produced by jig grinding. [1] While bearing some resemblance to a coordinate-measuring machine (CMM), its usage and accuracy envelope differs significantly. While CMMs typically move in three dimensions and measure with a touch probe, a UMM aligns a spindle (4th axis ...
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