Elastic Band

[JDGreen]

I need some help.

I am trying to create an elastic band between to round cylinders. So the effect is that the band increases in length as I pull the 2 cylinders apart. I have the part and sketch to be adaptive. The cylinders are isolated to moving in one direction.

Can anyone lead me down the right path.

Thanx

[MechMan_]

Do you have a dimension defining the length of the band? If so either remove it or make it a driven dim.



Do you have the band set to adaptive in another assy?



MechMan

[JDGreen]

It is a driven dimension. It is set to adaptive in only 1 assembly.

[MechMan_]

Can you post it to CF?

MechMan

[JDGreen]

I will post a dumbed down version in a bit.

Thanx

[JDGreen]

I have posted in the customer files Elastic.zip, which contains the scenario I have been going through.

Thanx

[Anonymous]

JD,

I made the Elastic Band adaptive and then suppressed the angular constraint
between that and the base part. Then added 2 angular constraints between
the "rollers" and the base. Made these equal to one another. Drove this
constraint and the elastic band becomes elastic! For some reason it was the
initial angular constraint causing the problem - funny thing adaptivity!!!!

--
Cheers,

--Rob Singlehurst

[Anonymous]

JD,

I went back and turned the angular constraint back on and it still drives
correctly with the elastic band adapting. I guess the 2 angular constraints
that I added have effectively made that one redundant - although it isn't
tagged like that in IV

--
Cheers,

--Rob Singlehurst

[Anonymous]

I have noticed many times that IV will not always tag constraints as redundant. Seems to be hit and miss.

[JDGreen]

Can you post this back to the customer files? I am not understanding how you applied the angle constraints to the "rollers"

Thanx

[JDGreen]

Never mind. I got it!!

I don't understand why my rotational constraints wouldn't work though?

Any insight in to this? It should have worked the same, should it not!