Putting Things in Place with Assemblies - Inventor 2013 and Inventor LT 2013 Essentials - page 105

6. Click OK to bring the parts together.
7. Drag the orange part to see that the selected faces stay in contact.
The tangency added follows the entire cylindrical face. If the face isn't a full
cylinder, components constrained to it will follow the curvature of the face even
if it moves off the end of the face.
The Transitional Constraint
A fifth type of constraint is available on its own tab. Where the Assembly tab's
Tangent constraint works well for simple curved faces, the Transitional constraint
works best with changing faces such as cams.
1. Verify that the 2013 Essentials project file is active, and then open the
c04-06.iam file from the Assemblies\Chapter​4 folder.
2. Launch the Constrain tool from the Assemble tab in the Position
panel or the marking menu.
3. In the Place Constraint dialog box, switch the tab to Transitional.
4. Click the yellow face on the orange part for the first selection.
5. Click the yellow face on the gray part for the second.
6. Click OK to accept the constraint. See Figure 4.7.
7. Drag the orange part to see how the Transitional and Tangent con-
straints work together to position the two components.
FIGURE 4.7 Different types of constraints can be
combined to create useful models.