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IK with Constraints problems


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Hello,

I'm trying to set-up an IK with constraints and it's not working. The problem is that the End Affector gets dettached from the tip of the End Bone way before the whole system is straight. The chain system is as follows:

post-6910-130763456352_thumb.jpg

post-6910-130763457942_thumb.jpg

The red bones are supposed to rotate along their X axis only. The blue bones are supposed to rotate only along their Z axis. The black bone is not supposed to rotate at all.

I have attempted several approaches that result in the same problem described above:

1.- A default IK with constraints system from root to end bone, not working.

2.- A much simpler system consisting only of the red bones and the chain root null node, the latter "Looking at" the End Affector*, same problem.

3.- Intermediate approaches using the red bones and one or two of the other ones. I tried starting the system at the first red node. Same problem.

Thank you all.

* At this point, it is not possible to just set the End Affector as the Look At object of the Chain Root Null. It generates an infinite loop error. It is necessary to create a system a bit more complex (Null -> Blend -> Fetch -> Chain Root).

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