Tolerance Stack-Up Analysis : Chapter 10

TRIGONOMETRY AND PROPORTIONS IN TOLERANCE STACK-UP ANALYSIS Topics •Rocking datum features •Constructing a valid datum •Consideration of differing orientations from measurement to assembly •An in-depth assembly analysis using proportions and trigonometric functions •Vertical stacking as it effects horizontal housing requirements •When stacked parts are not flat or parallel •Using proportions and trigonometry to calculate fit conditions beyond the GD&T formulae •Formulae to calculate worst case fit conditions when trigonometry is a factor •Computer programs vs. a personal analysis