topic Re: Transitional surface constraints in Inventor Forum

Transitional surface constraints

b_ruijter — Tue, 17 Jul 2018 10:08:31 GMT

Hi,

Trasitional constraints are giving me a headache. Ive made a slot and some pins to a dish to simulate movement.

But as you can see in the attached video the pin pops out of the slot and on the external surface?!

What am i doing wrong here?

Re: Transitional surface constraints

Xun.Zhang — Tue, 17 Jul 2018 12:22:28 GMT

Hello @b_ruijter,

Try to apply the Contact Analysis for a better result.

Set the pin as contact set and make sure the solver is active.

Thanks!

Re: Transitional surface constraints

johnsonshiue — Tue, 17 Jul 2018 15:51:37 GMT

Hi! I have seen this behavior before. There is a trick you can play which can help stabilize the solve. Open the rail parts which contain the stationary faces. Create a zero-distance offset surface on the stationary faces. Then extend the surface both ways to provide enough coverage. Go back to the assembly and edit the transitional constraints. Change the stationary faces to the offset surfaces.

Although transitional constraint, requires two face selection, the transitional motion can happen between any faces on the two participant components. By changing the stationary face to the surface body, the transitional motion is then limited to the offset surface body. Please try it out and see if it works better.

Many thanks!