The American Society of Mechanical Engineers (ASME),, is very specific in its description of the meaning and usage of tolerance. FARO has incorporated true position into CAM2 Measure, CAM2 Q, and CAM2 Gage with the intent of matching this specification as closely as possible based upon the amount and type of data that is made available as normal measurements. True position is defined as a cylindrical tolerance zone about the nominal centerline through the thickness of the material into which a hole is drilled or the height of a stud. In order to apply this concept to measurements, FARO software engineers made these assumptions. Dr Tech Wireless Weather Station Manual. • The datum features specified on the engineering drawing are used to establish the alignment. • There are small deviations between the nominal primary datum and the measured primary datum. • Material thickness is much less than the diameter of the feature.

The basic formula for True Position is 2 x the square root of the deviation in one axis squared + the deviation in the other axis squared. How To Install Flip Down Dvd Player In Van there. True Position = 2√ Deviation in X² + Deviation in Y² It's hard to convey a good example of the formula with the font limitation of this forum. However, the X & Y axis' are for a.

• Feature centerlines are perpendicular to the primary datum. As it concerns RFS (regardless of features size) and MMC (maximum material condition), you can apply these conditions to features only and not to datums. If your engineering data requires the application of these conditions to datums, you will need to calculate these manually. For Measured Circle Features The true position is calculated as twice the distance between the measured and the nominal as projected to the plane of the measured circle. • X = Distance between measured and nominal in plane of measured circle, True Position = 2 * X A more exact definition would be twice the distance between the measured and the nominal as projected to the plane of the nominal circle.