Skip to main content
G
gpommeranz10-Marble
10-Marble
June 4, 2025
Solved

Principal Axes Rotation Angles

  • June 4, 2025
  • 2 replies
  • 906 views

I have a mass system that I am designing isolators for.  I'm attempting to create a new coordinate system that represents the principal axes so that I can use that to identify locations and angles for the isolators.  My problem is that when I compute the principal axes, then create a new coordinate system at the location and orientation of the reported principal axes, the location is correct but the rotation is slightly askew and I can't figure out why.  In the picture below, I would expect my 1, 2, 3 axes and X, Y, Z to be on top of each other.  I uploaded the CAD files as well.    

Mass Properties Results.JPG

Principal Axes to Coordinate System.JPG

2 replies

S
23-Emerald III
StephenW23-Emerald III
23-Emerald III
June 4, 2025

I have had trouble when translating and rotating coord sys in one csys. I will break it up in to translation for a 1st csys and a 2nd csys for rotation. 

Not sure if this will help you or not. 

G
gpommeranz10-MarbleAuthor
10-Marble
June 4, 2025

Thanks, I tried that but still  got the same results with the axes slightly askew.  

tbraxton
22-Sapphire II
tbraxton22-Sapphire IIAnswer
22-Sapphire II
June 4, 2025

Have you reviewed this document yet? If not check out the process needed to get you to the target.

 

Article - CS33398 - After having entered 3 values in >Orientation >Selected CSYS axes for rotation about X,Y and Z when creating a CSYS1 from another CSYS0, orientation of CSYS1 seems wrong in Creo Parametric.

    G
    gpommeranz10-MarbleAuthor
    10-Marble
    June 4, 2025

    That did it!  Thank you very much!  Rotating about a newly created axis makes a big difference of how the coordinate system ends up.  

    Terms & ConditionsAccessibility statement