pull spring with eyelets

[fabry56]

Hello, everyone.
someone knows how to create a traction spring whose terminal eyelets remain fixed when using flexibility. the spring is clear to me how to do it but when you put the two eyelets do not remain aligned because one of the two varies position according to the length you go to change.
Thank you.
Hi.

 

[DANI-3D]

Hi.
If you place an image where you see the problem, we will probably help you find a solution.

 

[fabry56]

Hi.
I make the spring with the sweep helix then add the two hooks to the ends.
It's obvious that the hook downstairs is gonna look good, because it's where the spring starts, but the one on it will roll along with the coil, and it'll be based on the share I tell him.
If I want to stretch the long spring 40 and step 1 to 50 there is no problem but if you attach it to 50,6 I care because the hook will no longer be in line with the starting one.
Hi.
Thank you.

 

[DANI-3D]

Hi.
to solve the problem you have to act on the edges step, leaving the length of the wire constant. that is what happens in reality.

 

[BFausto]

Hi.
to solve the problem you have to act on the edges step, leaving the length of the wire constant. that is what happens in reality.

Hello, everyone.

if I have not understood bad to be able to keep the ends of the spring oriented always the same way you can follow for the construction of the spring itself the first part of https://www.youtube.com/watch?v=v4r8kqh3bos

 

[tartufon80]

ciao!
This is what Did you see her? Dani-3d has posted a possible solution!

 

[DANI-3D]

ciao!
This is what Did you see her? ...

Hi.
I did not, I had escaped, perhaps because it is a somewhat dated discussion. However, very interesting and refined the method of a curve with equation.
I usually carry out the springs with a helical sweep, with the flexibility I manage the length, then I divide it by the number of edges, with the relationships, and I find the step.