T-Spline help please

[CGPM]

I am trying to design a part that is symetrical along the Z axis.  The front "body" can be symetrical along the Z axis plane but the "tail" is extruded along a spline to make it wavy.  So far I have two questions:

1-  How can I add symetry to the tail along the Z axis to match that of the body?

2-  Can I add symetry to just the tail along the X, Y plane?  This would be nice but not necessary.

Once I get the body and tail connected with symetry I then need to finish the end of the tail off.

Thanks,

David

[CGPM]

Well, I really wish I could edit my post, at least for the spelling.  I just wanted to explain what I have done with my cad model a little more.  I modeled the tail by sweeping a profile, in sketch2, along the spline path, in sketch1.  I made the profile by sketching a quadrant and then mirrored it twice to get a closed profile so the tail starts out symmetrical.  It is only when tweaking the end that I could loose the symmetry.  This will work for my needs but it would be nice to constrain the symmetry.

[colin.smith]

Hi @CGPM

I took a look at your file.

I noticed that the red area of the T-Spline body you created had a crease in it that didn't continue along the rest of the body. (crease is indicated by the thicker/darker color of the edge)

So I uncreased it and was able to get symmetry along the XY plane.  However, when I tried the z symmetry, it went a bit nuts.  I don't think this is how it is supposed to work but I have a call in to the T-Splines team to find out. 

When I find out more I will update this post.

Colin

[colin.smith · Accepted solution]

I just checked with the T-Spline dev team.  The current symmetry tool works with a plane - so this is working as designed.

In your case it would be best if the symmetry worked on a T-Spline spine.  I'm putting in a backlog item on that request.

Hope that helps.

Colin

[CGPM]

Hi Colin,

Thank you for your responses.  Just to be clear the way I have the tail modeled does not allow me to constrain the symmetry at this point in time?

[colin.smith]

Hi @CGPM

Correct, if the "tail" of your model crosses the plane of symmetry (which is XZ in your case) it will not work the way you want. 

The symmetry follows a plane, not the spine of the object.

Hope that helps.

Colin