In Autodesk Inventor, a constraint that fixes a point to a curve is called what?

In Autodesk Inventor, the constraint that fixes a point to a curve is called a coincident constraint. This type of constraint allows you to position a point on a curve, ensuring that the point directly conforms to the path of that curve. When a coincident constraint is applied, it maintains a spatial relationship that locks the selected point to the curve, effectively allowing for precise control over the geometry.

The concept of a coincident constraint is vital in parametric design because it enables users to create assemblies or sketches where components need to maintain specific positional relationships. This ensures that the assembly or model behaves predictably when modified, adhering to the established geometry relationships.

In contrast, the other terms represent different types of constraints that serve various purposes in design but do not specifically achieve the function of fixing a point to a curve. For example, a fixed constraint would completely lock a component in place, not allowing for any movement at all. A concentric constraint is used to align circles or arcs around a common center, rather than tying a point to a curve directly. Lastly, a follower is not recognized as a standard constraint type in Autodesk Inventor's constraint terminology. Therefore, the coincident constraint is the correct term for the function described in the question.