Problem
1. What is the difference between part modeling and assembly modeling?
2. What is an instance? Why does a CAD/CAM system use instances in assemblies?
3. What does an assembly mate do?
4. List the part entities that you can use for mating.
5. What are the differences between bottom-up and top-down assembly modeling?
6. What is the advantage of using the layout sketch in the top-down assembly approach?