NX6 Point Constructor Deformable Follow

[Franco13Luis]

Hello
I'm trying to make a deformable spring with 3 Helix , the first Helix is Fix, the second is the one that I made deformable or variable I only increase the Pitch and this change the length but I have a problem to fix the third Helix to the end of the second

I tried to put a Formula but this give the result , when I change the pitch this stay at the same position in Z


I attach some pictures if I do not explain correctly

Thanks

 

[mmauldin]

The location of the helix is not associative and will not update when the spring is deformed. attached is a spring model that uses a law curve to allow closed ends and deform-ability. It is a NX6 file.