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# nikhil bhagat cmm presentation

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### nikhil bhagat cmm presentation

1. 1. COORDINATING MEASURING MACHINE PRESENTATION ON PRESENTED BY: NIKHIL BHAGAT (13MT07IND006)
2. 2. INTRODUCTION • Ogden developed an inspection machine in 1956,which is considered to be the first coordinate measuring machine (CMM). • A Coordinating measuring machine is an electromechanical system design to perform coordinate metrology. • CMMs are also considered as transducers that can convert physical measurements into electrical signals. • They are versatile in their capability to record measurement of complex profiles with high sensitivity (0.0025 mm) and speed.
3. 3. COMPONENTS OF CMM To accomplish measurements in 3-D, a basic CMM is composed of the following components:  Probe head and probe to contact the workpart surfaces  Mechanical structure that provides motion of the probe in three Cartesian axes and displacement transducers to measure the coordinate values of each axis In addition, many CMMs have the following components:  Drive system and control unit to move each of the three axes
4. 4. COMPONENT OF CMM(CONT..) PROBE:  The contact probe is a key component of a CMM.lt indicates when contact has been made with the part surface during measurement.  The tip of the probe is usually a ruby ball. Ruby is a form of corundum (aluminum oxide), whose desirable properties in this application include high hardness for wear resistance and low density for minimum inertia.  Most probes today are touch-trigger probes which actuate when the probe makes contact with the part surface.
5. 5. TYPES OF CMM Ass per the mechanical structure the CMM are classified into six types , which are as follows:  CANTILEVER  MOVING BRIDGE  FIXED BRIDGE  HORIZONTAL ARM  GANTRY  COLUMN
6. 6. MECHANICAL STRUCTURES OF CMM
7. 7. CMM WORKING  After placing a workpiece on the machine table, a probe is used to measure different points on it by mapping the x, y, z coordinates.  The probe operates either manually via an operator or automatically via a control system.  These points are then uploaded to a computer interface where they can be analyzed using modeling software (e.g. CAD) and regression algorithms for further development.
8. 8. CMM CONTROLLING The methods of operating and controlling a CMM can be classified into four main categories: Manual drive Manual drive with computer-assisted data processing Motor drive with computer-assisted data processing DCC with computer-assisted data processing.
9. 9. ADVANTAGES OF CMM  Dimensional measurement  Profile measurement  Angularity or orientation  Depth mapping  Digitizing or imaging  Shaft measurement
10. 10. THANK YOU