Probly been asked before but I can't find a reference to it.

I want to make a mechanical arm controlled by a hydraulic piston. The piston sections are children of the lower arm, the upper arm is a child of the lower arm, but then the upper arm would also need to be a child of the piston.

This would leave the upper arm with two pivot points; one on the 'elbow', and one where the piston joins it. YIKES!

I've tried hacking the CR2 to add weld and parent statements, but can't get both joints to be active at the same time - either one or the other works, but not both.

Can this be done in Poser?

I think it must be possible, I'm sure I've seen someone do a Poser figure of a mechanical digger with a similar setup

But How?

Does anyone know of a tutorial that covers this?

regards

peejay