Probing system is a principle component of CMM which has the function to identify coordinate points of the object surface. Numerous types of probing systems are being used on CMM's depending on functional requirement and machine capability. Different types of probes have been evolved over the years since its early inception in seventies. During the early introduction of CMM hard probs were widely used and machine works like 3-axis milling machine. With the advent of sophisticated electronic and computing systems, new variety of electro-mechanical, electronic and optical probing systems have been evolved. The capability and applications of CMM's are primarily defined by data acquisition system (probing system) and data processing. Now a day's connection and non-connection types of probing systems are mostly used for CMMs. This paper reviews the probing systems used on CMM with a particular focus on the test method, materials, measurement techniques, etc. Also, this paper describes the limitations of CMM on micro and nano scale measurement.

Coordinate Measuring Machines (CMM) are widely used in industry as an inspection part where a product is subjected to verification of the geometric features , dimensions and tolerance specifications with respect to the pr oduct design specifications. The most of the series standard ISO 10360 are developed and are in developing process to assure q uality and increase accuracy of CMMs over the past 15 years. T his paper presents the importance of calibration as a key for establishment traceability of the measurement resul ts with Coordinate Measuring Machines.

This paper is on design and fabrication of modular fixture setup relative to inspection on coordinate Measuring Machine proposed and planned to increase the utilization of Coordinate Measuring Machine with respect to inspection activity by reducing setup time. The modular fixture design will hold component of different configuration, size and shape without much efforts to locate, align and clamp the components on the fixture. The modular fixture will ensure that even though the component is of different configuration will have one time design and setup configuration which will be standardized by assembly of fixture and then on fixture setup time will be less than a minute on the machine that to only if fixture is disturbed / removed from the Coordinate Measuring Machine table. Modular fixture will reduce setup time, hence increase opportunity to utilize the machine for useful value adding inspection purpose rather than setup activity which is noted to be non value adding activity. Along with design of modular fixture standardized method of component setup strategy is provided as work instructions to ensure components are mounted same way each time and every time whenever it is in use irrespective of time and resource.

Coordinate measuring machines (CMMs) are widely used to check dimensions of manufactured parts,especially in the automotive industry. The major obstacles in automation of these measurements are fixturing and clamping assemblies, which are required in order to position the measured object within the CMM. This paper describes how an industrial robot can be used to manipulate the measured object within the CMM workspace, in order to enable automation of complex geometry measurement.