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Hands-on training in Operation and Programming of CNC Co-ordinate Measuring Machines (CMMs)


Focus Areas

  • Introduction to CMM and Proper use of CMM
    • Types of CMMs – Cantilever, Bridge, Gantry & Portable CMMs.
    • Types of Probes, Probe Heads & Styli. Advantages & Limitations
    • Interpretation of Measuring Uncertainty; International Standards & Norms
    • Environmental conditions, specifications, their Importance and effect on measurements.
    • Calibration of a CMM, Frequency & Methods.
  • GD&T - Geometric Dimensioning & Tolerancing
    • Specifying and Interpreting GD&T parameters in Engineering Drawing
    • Meaning of RFS, MMC and LMC conditions
    • Measurement of Form, Orientation, Location and Profile tolerances in CMM
    • Exercises and Sample drawings for arriving at right inspection procedure
  • Using CMM for Dimensional checking and validation
    • Importance & Dynamics of Probing system; Selection of right probing system
    • Mounting probe head and fixing styli
    • Configuring probes (Styli), Calibration with Master Sphere
    • Basic Geometric Elements & their Classification.
    • Lines & Vectors (I, J, K), Directional Cosines their definitions and application in programming.
    • Computing geometric elements – Manually & in Auto Mode.
    • Understanding adequacy of number of points, effect on element computation & result output.
    • Methods of component alignment & Logical Approach
    • Hands-on practice  / Group exercises in measuring Industry parts.
  • User Interface – PCDMIS
    • Standard menus of the start up screen; Use of Edit, Graphics & Report windows.
    • Setting up inspection plan of a component.
    • Loading and Calibrating various probe combinations.
    • Setting up a New-Part Program, Defaults & Customised operations.
    • Using Manual, Auto & Constructed features / Elements and other tools.
    • Out put of Inspection report and interpreting reports
  • Advanced options in using CMM
    • Programming and Using CMM in AUTO mode / DCC operations, movements & precautions
    • Importance of defining clearance planes for avoiding collision
    • Understanding Limitations of computing Form errors. (Flatness, Circularity, Cylindricity etc.)
    • Inserting & Using CAD Model for component programming.
  • Usage of Interchangeable clamping systems for quick set up of parts
  • Do's & Don'ts while using CMMs
  • Case Studies & Group Discussions
  • Hands – on practice and Group exercises on CMM.

Background

In the modern manufacturing environment, process control and quality assurance depend increasingly on the performance of Co-ordinate measuring machines. Today CMMs have replaced traditional methods of inspection with gages and fixtures thus reducing the time and manpower required in quality control operations. However, thorough understanding of concepts, measuring uncertainty, GD&T, right probing method are very crucial for getting reliable results from any CMM.

Rapid growth of CMM population all over India has subsequently generated enormous demand of Trained / Skilled engineers for successful & meaningful handling inspection challenges. This can be achieved only if the CMM engineer possesses basic engineering knowledge, Inspection skills and has a logical and analytical approach to fulfill the task.

This course will cover in detail about all the aspects a practicing CMM engineer requires to know for effective use of CMM for reliable measurement results. Hands-on training in CMM with live measurement exercises of industry components will be given more emphasis.

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