Skip to main content
Solved

Rotation of two cylinders in non-sequential mode around a common object

  • June 13, 2025
  • 1 reply
  • 27 views
Travis3

Hello,

 

I am currently trying to replicate some of the previous chats that say you can rotate multiple objects around a common object in the NSCE. 

 

Aligned cylinders

 

(see image above) I currently have a small ellipse as my object  I want the two cylinders to rotate around. The first cylinder has one edge right where the ellipse is and it extends 90mm. Then I wish to start a new cylinder that is smaller in diameter from the end of the first cylinder. This new cylinder extends 50mm. I wish to have both rotate around the ellipse that I have. That is when I rotate the ellipse, the two cylinders rotate and stay centrally aligned to one another.

 

Currently when I try to do the pickup method, I get this result (see image below). 

The second cylinder rotates 5 degrees, but does not stay aligned with the end of the bigger cylinder. I am not sure how to fix this? I have tried doing pickup on several variables and am not getting any luck.

 

Any and all help would be greatly appreciated! Thanks! 

Best answer by MichaelH

Hey Travis,

You should use the Ref Object column of the second Cylinder Pipe:

  • For Object 4, make the Ref Object 3
  • Remove all the pickups from the second Cylinder Pipe
  • For Object 4, make the Z Position equal to the length of the first Cylinder Pipe (90)

Now, when you rotate first Cylinder Pipe, the second one will always be referenced in local coordinates (namely just 90 units away from the newly rotated axis).

View original
Did this topic help you find an answer to your question?

1 reply

MichaelH
Ansys Staff
Forum|alt.badge.img+2
  • MichaelH
  • Ansys Staff
  • 366 replies
  • Answer
  • June 15, 2025

Hey Travis,

You should use the Ref Object column of the second Cylinder Pipe:

  • For Object 4, make the Ref Object 3
  • Remove all the pickups from the second Cylinder Pipe
  • For Object 4, make the Z Position equal to the length of the first Cylinder Pipe (90)

Now, when you rotate first Cylinder Pipe, the second one will always be referenced in local coordinates (namely just 90 units away from the newly rotated axis).

~Michael
Sean Turner
David.Nguyen
2 people like this
  • Sean Turner
    Sean Turner
  • David.Nguyen
    David.Nguyen

Reply


Community Posting GuidelinesCookie settings

Cookie policy

We use cookies to enhance and personalize your experience. If you accept you agree to our full cookie policy. Learn more about our cookies.

 
Cookie settings


Zemax Community

Need more help?

To Chinese users:

Do not provide any information or data that is restricted by applicable law, including by the People’s Republic of China’s Cybersecurity and Data Security Laws ( e.g., Important Data, National Core Data, etc.).


不要提供任何受适用法律，包括中华人民共和国的网络安全和数据安全法限制的信息或数据（如重要数据、国家核心数据等）。



Privacy policy   License Agreements    Terms of use    Cookie Policy   Zemax Account Licensing Policies