assembly constraint

In an assembly, I want to constrain a gear and a rack by using sketch lines available in each part. My first problem is that I cannot see sketches of these parts at the assembly level. How can I accomplish this? Using Atom3D V26

Hello! I am trying to constrain a pulley to a spoked wheel in an assembly. The problem is that the spokes are not in plane--they are conical/dished. I need the inside edge of the pulley to rest on the outside of each spoke. When the spokes are in plane, I accomplish this with a tangent...

File attached It is possible to create a cam part (e.g. Large radius + small radius + 2 tangent lines) and a follower part (circular boss) then assemble them with constraints such that when the cam is rotated about the large radius the follower will move in a linear fashion? I can make the...