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Help simulating a wheel on a pin with a constant velocity


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Posted

I have an assembly with a grounded pin in the center of an ungrounded wheel that I want to simulate turning at a constant velocity. Under dynamic assembly, the only items in the browser are the pin and wheel under 'Grounded' and gravity as the external load. The 'Convert Assembly Contraints' is grayed out, so I have been trying to insert a joint at the pin and wheel connection. Here are my questions

 

Is the proper joint type to use a 'Rolling Cylinder on Plane'?

If so, I am confused as to where to select for 'Axis/plan', Origin, and X/Z Plane. Same confusion for Cylinder selection points.

 

Once the joint is properly defined, I suppose all I need to do is impose a torque force at either the wheel face, or pin, or? I'm a neewbie and would be thrilled with any help!

Posted

If you are using dynamic simulation you must be wanting something out of the result. What is your intent here, just to show the motion or to extrapolate calculations off the parts? If it is not the latter you may want to investigate Inventor Studio or a simple Drive Constraint.

Posted
If you are using dynamic simulation you must be wanting something out of the result. What is your intent here, just to show the motion or to extrapolate calculations off the parts? If it is not the latter you may want to investigate Inventor Studio or a simple Drive Constraint.

 

My end goal is purely the visual effect. I have struggled with the Drive Constraint, but so far unsuccessful. I think it is because I have not defined the proper constraint for which to drive. What type of constraint should be defined...is it Angle? Should the angle be 360 degrees. Which objects are selected...are they the front plane of the wheel and the front surface of the pin? Any help would be much appreciated!

Posted

For the Drive Constraint, expand your parts in your assembly browser and use the Angle constraint on two Origin Planes, one for each part. You should have built your models around their respective origins in order to really accomplish this. Read the linked PDF for better understanding of this entry level topic of using your origin in your part files which will help you in your assembly.

 

http://imaginit.rand.com/files/The%20BORN%20Technique.pdf

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