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denizbilgili

MotionView says curve graphics in contact are not coplanar while they actually are

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Hello,

 

I am trying to build a rigid mbd model with rigid bodies engaging in 2D rigid-to-rigid contact. I have defined curves where the contacts will occur, using the Add Curve functionality. Attached images 1.png, 2.png and 3.png from my curve panel, showing the settings I am using for all three contact curves. As you can see, in the Z direction, they all have the same value as 0. So they are indeed coplanar as they all line on the XY plane.

 

I proceed to define a 2D rigid-to-ridig contact. Attached image, contact.png, shows my settings for one of the contacts I use. I have also made sure to correctly define the contact sides; so there are no problems there either.

 

Finally, attached image, error.png, shows two of the error messages I'm getting. All my error messages are the same so I am only showing those two. It is telling me my curve graphics are not coplanar. However, what it seems is that they actually are indeed coplanar.

 

I would be grateful for any help to fix this problem.

 

Best regards

 

1.PNG

2.PNG

3.PNG

contact.PNG

error.PNG

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Hi,

 

Is it possible to share the model files?

 

Please use the file transfer link in my signature below to share model file/

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Hello,

 

I have just sent the model file. However, for security purposes, I was able to send only the necessary parts, which show all the curves and contacts. It should be enough to let you see the problem.

 

Thank you.

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Hello @Prakash Pagadala,

 

Thank you for your reply. Unfortunately, I am still unable to see why I need to offset the curves while they are already sharing the same Z coordinate, which already makes them coplanar. Since all curves look coplanar, how could I know which curve I should offset and by how much?

 

UPDATE: I checked the coordinates of the points (centers of mass) I use as origins of the curve graphics and saw that they were not perfectly aligned in the Z axis. I manually aligned them and now I am not getting the errors. For future reference, I would suggest others to double check the coordinates of the origin points they use for their curve graphics.

 

Thank you for your help. My problem is now solved.

 

Best regards

 

 

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@denizbilgili Looks like most of the curves are in a plane whose z coordinate is 80.5. But the two curves (representing inner race and outer race) have z coordinate = 80.4993. Adjust the z coordinate of origin of Curve Graphics so that all are in the same plane and then you should be able to run the model.

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53 minutes ago, Prakash Pagadala said:

@denizbilgili Looks like most of the curves are in a plane whose z coordinate is 80.5. But the two curves (representing inner race and outer race) have z coordinate = 80.4993. Adjust the z coordinate of origin of Curve Graphics so that all are in the same plane and then you should be able to run the model.

Exactly, that's how I fixed it. Thank you again for your help and time.

 

Regards

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