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Thread: How to Rotate an object from the centre

  1. #1
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    How to Rotate an object from the centre

    Hi,

    I am trying to created my own blade for a louvre the rotates from the centre.
    I have found some of the tutorials showing how to make the simple blade that rotates from the corner of the object but what do I have to do, if I want to make a complex object rotate in the centre?
    I have created the reference line(Plane), which rotates perfectly fine, and imported a component and mapped the parameter for the width but when I try to align the component and the reference line I have an error message saying that “Can't rotate element into this position.” or “Constraints are not satisfied” How can I make the object follow the reference line


    How to Rotate an object from the centre-untitled2.jpg How to Rotate an object from the centre-untitled.jpg

  2. #2
    BIM there, done that cliff collins's Avatar
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    You are on the right track.

    Your model geometry needs to be locked to the ref. plane. Make sure the angular dimension is snapped to the ref. line and the horizontal ref. plane.
    Then assign a parameter to the angular dimension, and name it "rotation angle" or similar.

    Then under Properties, change the parameter value and see if the family "flexes"--meaning it will rotate to the angle specified in the new parameter.

    You may need to uncheck "work plane based" to "unconstrain" it so it will rotate? (not sure about that without testing it.)

  3. #3
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    Hi cliff collins,
    Thanks for your response.

    So I have Locked the model geometry to the vertical and horizontal ref. Planes and locked as well as the angular ref. line and assigned a parameter to the angular dimension called "Angle" and unchecked "work plane based".
    Also I went back to the original Generic Model file to lock the bottom surface onto the horizontal ref. plane. and sat the reference plane to Ref. Level.
    Than when I try to align the model to angler ref. line I have a error message saying that
    “Can't rotate element into this position.”.
    This should not be so hard to do, so I am assuming that I am missing something critical here.

  4. #4
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    It looks like your louver geometry is nested into the family you are working on, correct?

    Did you make the reference line that the angle parameter is attached to the workplane of the louver geometry?

    Set the angle to 0, edit workplane of the louver family to the reference line (make sure the family is work-plane based), and rotate away.
    Attached Files Attached Files
    Last edited by Andrew K; April 3rd, 2013 at 01:10 PM.

  5. #5
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    I have got it at last.

    So I have sat the rotating ref. line as a ref. plane and placed the component onto the line. Then the component is already is in the angler.
    I was placing it before setting the ref.plane in the angle then turn it after....
    That was silly....

    Thank you so much for your help.

    Last edited by Katayamamayataka; April 4th, 2013 at 05:59 AM.

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