Forums >> Revit Systems >> Technical Support >> Polar Array - How to constrain the center location?

RyanJavlyn

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Joined: Wed, Jun 27, 2012
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I'm trying to utilize a polar array to create part of the geometry for a valve family that I'm creating.  However, I am having trouble getting the center of the polar array to stay in one location.  I'm using a nested family for the array, but I can't find a way to constrain the geometry so that the center of the polar array stays in the same location when the parameters are adjusted.  Any constraints that I apply seem to yield the over constrained error when I try to change the parameters.

Thanks for your help.  Ryan

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WWHub

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Joined: Tue, May 16, 2006
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First, I think you are not using the nested family...you have arrayed in this family.

Place 2 reference planes where you want the center of the array and insert your nested family at that intersection - align and lock the nested family there.

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RyanJavlyn

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Joined: Wed, Jun 27, 2012
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Yes... I don't know why I didn't think of that.  I needed to create the array in a separate family and then insert that family into the valve family.  Then I could constrain the entire array properly.  Adding more layers to "The Matrix" generally fixes the problem with rotations and arrays in families.  Thanks for jogging my memory.  Nesting families is very powerful for fixing these types of issues.  I've attached the fixed family for reference to others.  -Ryan

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