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# IT 250 - Coordinate Measuring Machine

Credit Hours: 2

Provides students with a thorough understanding of coordinate metrology. The emphasis is on geometric measurement and inspection techniques as they pertain to a Coordinate Measuring Machine (CMM). This course also covers construction, calibration, operation and maintenance of CMM’s.

Course Outcomes
Upon successful completion of this course the student will be able to:

• identify quadrants and be able to make measurements and calculations relative to the Cartesian coordinate system;
• plot various X&Y coordinates on graph paper;
• using the CMM and a sample part, demonstrate the ability to:
• translate the part coordinate system in the X,Y&Z axis;
• rotate the part coordinate system in the X,Y&Z axis; and
• store and recall the part coordinate system.
• explain and define machine coordinates and part coordinates;
• identify measurement planes for various features on a CMM test piece;
• using the CMM and a sample part, demonstrate the ability to:
• display machine coordinates;
• recall precious measured features and establish a part coordinate system; and
• recognize an incomplete coordinate system.
• define various geometric features;
• using the CMM and a sample part, demonstrate ability to measure each of the geometric features;
• explain how geometric dimensioning and tolerancing is a dimensioning system which thoroughly defines a part;
• list advantages of geometric dimensioning and tolerancing;
• demonstrate how datums are established using a CMM;
• demonstrate proper technique for hard probe calibration;
• demonstrate proper technique for touch probe calibration;
• explain the differences between mechanical and air bearing systems and the function of both;
• identify at least four materials utilized in the construction of CMM’s;
• use proper cleaning techniques and solvents for various parts of a CMM; and
• properly and safely use a CMM to accurately measure part features to print specifications.

Prerequisites: IT 210 or permission of the instructor.
S (N)