Often inexperienced coordinate measuring machine (CMM) operators will perform dimensional measurements without correctly establishing a…

What is a coordinate measurement machine?  “A coordinate measuring machine (CMM) is a device for measuring the…

  Length bar measuring machine   Newall measuring machine   Universal measuring machine   Co-ordinate measuring machine   Computer controlled Co-ordinate measuring machine

Introduction   Geometrical test   Static test   Dynamic test   Practical test Various geometrical…

Introduction: “Light Amplification by Stimulated Emission of Radiation”.   Laser metrology   Laser telemetric system   Laser and led based distance measuring instruments   Scanning laser gauge   Photodiode array imaging   Diffraction pattern technique   Laser triangulation sensors   Two frequency laser interferometer   Gauge wide diameter from the diffraction pattern formed in a laser. Principle of laser: The principle involved in laser is when the photon emitted during stimulated emission has the same energy, phase and frequency as the incident photon.…

Roundness or circularity: Is the radial uniformity of work surface measured from the centre line of the work piece. Methods of measuring roundness:   V- block and dial indicator method   Roundness measuring machine

Flatness: A surface is said to be flat within a given range of measurement. Flatness testing: r anauto If the test  surface  is  large,  then  it  is tested  for  flatness using  a sprit  level o collimator. Procedure to determine flatness: A surface can be considered to be a collection of a large number of lines. Flatness testing by…

Straightness: Is a geometrical shape. Straightness measuring instrument:   Straight edge   Sprit level   Auto – Collimator

Introduction: Contain degree of surface finish is required for the proper functioning of the working surface. Types of surface finish:   Nominal surface   Rough surface   Wavy surface Elements of surface texture:   Surface roughness   Profile…

Radius measurement methods:   Radius measurement using surface plate and rollers. (external radius)   Radius measurement of concave surface (internal radius) Radius measurement using surface plate and rollers (external radius): 1.…