Problems with a robot rig

This is a bit hard to explain, but I’ll try.

The problem is around the elbow, where the ubber arm is in 2 parts, where the part near the elbow, needs to follow (rotate with) the lower arm when it turns (rotate). But the part near the shoulder shall not.

PS: Just say if I’ll need to make a better explanation.

posting a few pictures may help explain exactly what you are meaning, this will help people better when trying to see exactly what the problem is

This is a test, just to show the problem. I hope it help.

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are you setting up this rig using armatures? if so then try looking for a tutorial on armature rigging, cant really help you till i have all the info

I’m using armature rigging

you need to make a better explanation.

or, better, attach your blend file and a hand draw plan of what you want to do. :wink:

The sides on the two objects shall allways be parallel, no matter how the arm moves with the use of IK.

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give both cube copy location with relative bones… do not use child of if you are using then…
hope this helps

thanks

Thanks for your advice draguu. I tried to do as you said (I think), and it allmost worked. In the following images show the arm bended at 2 different angles, 1 picture from the side and 1 from the front, for each angle. As you can see, it follows the rotation better when I extract the arm more. But I want it to follow the the rotation perfect, at any angle.

PS: 1 of the images show the constrain I have used, to make the cube follow the rotation.

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Here are the rest of the pictures

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sorry but i dont understands what you want buddy … explain it more… what you want to rotate and what you want to follow it

Okay here are some pictures of the real robot arm I want to rig. I have set it in different positions, so you can see at wich joints, it turns wich way. I hope these pictures gives a better understanding.

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try this mate …

http://www.pasteall.org/blend/4535

hope this helps

thanks

What is it? Sry, but I dont download anything, when I don’t have any idea of what it is.

aah its blender file … containing normal rig setup of robo hand

I have looked at the blend file, but it doesn’t seem to use what I need.