[DaveH]

bwtr said: Could the Modifier>Behaviour>Track be of some interest maybe?

I looked at that after you mentioned it, but I'm not sure how it would get the effect. Another way of looking at this is that I'd like to constrain the distance between bones but without having the IK interaction behavior on it.

medeamajic said: IK will not keep things anchored! Target helpers will.

The effect I remember having was the IK endpoints set the position of the chain, just like with normal IK, but instead of the other joints being driven by "normal" IK calculations, I was able to drag them around.

medeamajic said: Send me your email and I can send you a file that might be what you want. There could indeed be more than one solution to your problem.

Email sent via PM.

medeamajic said: Did you just have the skeleton or a mesh figure? With actual chain link you could do it through a hierarchy (no bones constraints with IK only)

The reason I'm looking for chain behavior on bones only is because there is a tube mesh surrounding the bones. The visual effect I want is sort of like a tube with a chain inside.

EDIT: I attached a sample file