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MarcHaren8-Gravel
8-Gravel
October 31, 2022
Question

Mirroring bodies axis not showing up on mirrored body.

  • October 31, 2022
  • 1 reply
  • 2329 views

Using CREO 7 and somewhat new to using the body function.  We are trying to figure out why in skeletons you can't mirror a body with an axis that was created in the body we are trying to mirror.  So we select the body (actual body, not extrude in model tree), select axis created in body, then mirror body/axis with a datum.  The body will mirror perfectly but the axis doesn't show up.  The only way we can get the axis to mirror is to do it separately.  Any ideas on how to do this in the same mirror?

1 reply

tbraxton
22-Sapphire II
tbraxton22-Sapphire II
22-Sapphire II
October 31, 2022

Bodies contain only solid geometry. Nonsolid entities, like datums, curves, and quilts, are not contained in any body. If you select the body datums are not included.

 

Your issue is not a skeleton induced behavior.

 

Skeleton models best practice is generally not to include solid geometry in a skeleton model.

    M
    MarcHaren8-GravelAuthor
    8-Gravel
    October 31, 2022

    Appreciate the reply, just trying to understand this better! 

     

    So we were under the impression that if you use bodies in a skeleton they have a lot of the same functionality as surfaces/quilts.  In some areas more functionality than using surfaces/quilts.  There is even an option to create a part from a body within the skeleton which creates a part with a copy geom of the body.

    MarcHaren_0-1667235771230.png

      

    So if we created a skeleton using a body with an extruded hole and axis...

    MarcHaren_1-1667235829450.png

     

    Then we mirrored said body/axis by including both in "mirror items"...

    MarcHaren_2-1667235943407.png

     

    The result is the body mirrors but the axis does not.  CREO is typically pretty good about not letting you select items that won't work with different modeling functions so this was a bit odd.

    MarcHaren_3-1667236137969.png

     

    But if you select just the axis and perform a mirror it will allow it.

    MarcHaren_4-1667236283945.png

     

    Again appreciate any help thanks!

    tbraxton
    22-Sapphire II
    tbraxton22-Sapphire II
    22-Sapphire II
    October 31, 2022

    I would open a call with PTC support on this. They need to clarify if a datum internal to a body is treated as a datum entity for selection purposes.

     

    I think that you may have found a "bug". I agree that Creo UI implies that both references should mirror as you have selected them. I have tested this in a part, and it behaves the same. I suspect it is due to the fact that the axis is not external to the body and Creo does not classify this axis as a datum entity for inclusion in a mirror.

     

    If you query the references of the mirror in your example you should see that both the body and axis are explicit parents of the mirror feature. This is curious since the axis is not mirrored.

     

    This command line info shown below when selecting mirror refs during the creation of the mirror feature certainly implies that you can include a body and a datum entity.

    Select any number of references, such as bodies, quilts, curves or datum entities to mirror.

      

    This is also confusing since I can create a part from the same body and include the body axis in the copy geom so it is present in the target part.

     

    If you mirror your skeleton model then the axis is included in the mirror as well.

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