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Basics - CMM, Part 2: Fundamentals

January, 2021

Are you looking to learn the fundamentals of Coordinate Measuring Machines (CMM) including their capabilities, advantages when compared to other measurement practices, technical tips and next-generation functions? Our free metrology resource website offers key knowledge and information related to dimensional measurement instruments, environment requirements, selecting the right tool for the job, and various inspection processes.

Fundamentals

1 Overview

A coordinate measuring machine (CMM) is a measuring device that measures the geometry of objects by establishing discrete points on a physical surface using a contact probe. The machine will specify the probe's position in terms of displacement from an origin point in a three-dimensional coordinate system (XYZ axes). A CMM can measure critical 3D dimensions with high-accuracy, record the measured data and obtain complex GD&T features. Non-contact models use other methods such as cameras and lasers.

2 Capabilities and Advantages

CMMs have three dimensional measurement capabilities, unlike hand tools such as micrometers, vernier calipers or height/depth gages, which are limited to measurement in only one direction at a time. They can also measure items that are difficult to measure with other measuring machines to a high degree of accuracy, with a significant amount of automation.

3 Core Technology and Advancements

Learn about the core techology that drives these tools, and the next-generation coordinate measuring machines that bring added-value to production and quality inspection.

Measurement Fundamentals is an informative site offering knowledge related to dimensional measurements in manufacturing, including CMM basics. Visit the site to learn more about the topics above and more!