Learning Forum

[vishwa.kasoju]

Hi Everyone,

My model consists of two plates (assuming them to be connected by a hinge). I want to define rotation to one plate and have the other plate rotate freely with respect to other plate using 6DOF. Further, i also want to restrict the rotation angle for the free plate.

I was able to figure out giving motion to one plate using CG_Motion in the udf but for the free plate i am unable to restrict the rotation angle with respect to non-free plate. Can some one suggest how should i go about this?

[Amine Ben Hadj Ali]

the examples in manual shows how motion can be restricted. Did u check that?

[vishwa.kasoju]

Hi,

Thank you for your reply. Can you tell me which manual you are talking about? 

[Amine Ben Hadj Ali]

Customization guide

[vishwa.kasoju]

If you are talking about the picture below, yes i looked at the examples. I don't see any help on how to restrict an angle with respect to other body.

Thank you

[Amine Ben Hadj Ali]

you can restrict motion and therefore angles. If you want to restrict the angle by using another cg motion udf where you access the motion attributes of the 6dof region and adjust the motion of the zone.

[Amine Ben Hadj Ali]

And simple to give maximum and minimum angle as in the one dof properties. That can be also done per udf.

[vishwa.kasoju]

 

Thank you for your quick reply.

I have two questions regarding your suggestion above

1) can we access the motion attributes (in my case - angles of a plate that i am rotating) in the cg motion udf of freely rotating plate?

2) How to access the motion attributes (such as angles) of 6DOF region?

If possible can you please direct me to an example in one of the documentations/tutorials that students have access to?

Best Regards,

Vishwa Teja

[Amine Ben Hadj Ali]

And you define the motion relative to another zone. if still not clear provide more details and screenshot how the bodies will move relative to another.

[vishwa.kasoju]

In 6DOF, the minimum and maximum angles are with respect to global reference frame right? but I want to restrict the angle of the free plate with respect to another plate that i am prescribing motion to. How to restrict the angle of free plate with respect to other plate? 

[vishwa.kasoju]

I am attaching my model below. I am prescribing motion to plate 1 and plate 2 is free to rotate. However, i want to restrict the rotation of second plate so that the second plate does not move more than 180 degreed with respect to plate 1. I have prescribed motion for plate 1 using a UDF but i am unable to restrict the angle for plate 2 with respect to plate 1. Points 1 and 2 are the rotation points for each plate, respectively.