Table of Contents

1. CAD based Tolerancing 
2. Manufacturing Considerations 
3. Competing Requirements 
4. Tolerance Analysis 
5. Push Button Tolerance Analysis 
6. Computer Tools for FEA 
7. The Ideal Tolerance Analysis System 
8. 3 Sources of Variation in Assemblies 
9. 2-D Vector Loop 
10. Vector Assembly Model 
11. 2-D Kinematic Joints 
12. 3-D Kinematic Joints 
13. Vector Path Through a Joint 
14. Vector Path Across a Part 
15. 2-D Propagation of Surface Variation 
16. 3-D Propagation of Surface Variation 
17. Assembly Tolerance Specifications 
18. Design Specifications 
19. Design Specifications (CONT.) 
20. CAD Assembly Model 
21. TIdentify Critical Assembly Features 
22. PIdentify Critical Assembly Features (cont) 
23. Create Datums for each Part 
24. Create Joints Between Mating Parts 
25. Generate Vector Loops 
26. Add Geometric Tolerances 
27. Completed CATS Model 
28. 2-D Projection Plane 
29. Completed 3-D TI/TOL Model 
30. Screen Shot 
31. Non-Parametric Change 
32. Parametric Geometry Change 
33. TI/TOL Analyzer 
34. Analysis Window 
35. Analysis Results 
36. Percent Contribution Chart 
37. Tolerance Allocation 
38. Tolerance Allocation Window 
39. The CATS System 
40. Current CATS Systems 
41. CATS Assembly Modeling Status 
42. CATS Tolerance Analysis Status 
43. Concurrent Engineering 
44. ADCATS 
45. ADCATS Sponsors 
46. Controlling Variation 

Author: Ken Chase