CMM

Understanding The CMM: The Coordinate System We use a coordinate system to describe the movements of a measuring machine. The coordinate system, invented by the famous French philosopher and mathematician René Descartes in the early 1600's, lets us locate features relative to other features on workpieces.

Lab will be held on Week-8 in Hess building Rm. 107 Lab schedule will be same as last two labs Lab report will be handed in on Week-9. Lab time will be approximately 2 hours.

Lab Objective: Familiarize yourself with the CMM and all components Steps needed and importance of qualifying the probe Align block Measure and record dimensions. Lab instruction: A demonstration will be provided on how to take measurements using the CMM. Care should be taken not to touch the slide tracks. When moving the probe, be careful not to bump it into any of the objects mounted on the table. Refer to page 2 of block_measurement.pdf for given dimensions of the block. Create a table to record your data. It should have one column for each group member and one row each for the following types of measurements: (See below for an example) Angle, Diameter, Distance between two holes, radius of curvature, slot length, length and width of block, depth of hole, distance from edge.

Lab output: When taking measurements clearly indicate in a diagram the dimensions you gathered. Verify your measurement with the drawing provided. Then Calculate their distribution and standard deviation of measurements. Optional: You can bring your own part and measure its dimensions.

Member NameMember 1Member 2Member 3Member 4Member 5Member 6MeanStd. Dev. Angle Diameter Distance between 2 holes Radius of Curvature Slot length Length of block Width of block Depth of hole Distance from edge