Center Constraint

[Nahid Mubin]

I want to make a component to be in the center of another component. But the center constraint doesn't work. The constraint become pink in color and shows error. I have used 2 to 2 center constraint where I selected 2 faces from component1 and another 2 faces from component2. Note that the component1's faces aren't parallel with the faces of component 2. Is it the reason behind the error? If so then how can I put the component1 in center of component2. Check the following picture-

 

[JohnRBaker]

Yes, I suspect that it has to do with the non-parallel nature of the faces.

John R. Baker, P.E. (ret)
Irvine, CA
Siemens PLM:

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[AZPete]

Use the mating edges.

First pair from the inserted part leading face, second pair from the receiving part mating face.

 

[cowski]

Using the edges in this case is a good suggestion.

Also note that you can add geometry specifically for constraints in your part file. For example, when working with a compression spring, there isn't much in the model that is useful for assembly constraints. In this case, I'll add a cylinder to the part around the spring geometry for reference; I'll add it to a new ref set called "constraint geometry" and remove it from the model ref set. When positioning the spring in the assembly, I change to the constraint ref set, add the desired constraints and then change back to the model ref set.

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[mmauldin]

If the faces are parallel AZPete's method will work unless you need space between the components. If you need space or the faces are not parallel, I would add a bisector datum plane to each component, then align or mate the datum planes in the assembly.