Pinning 2 objects together

There are couple ways to do this. For the best control use a combination of IK tags and constraints. Both require MOCCA. However since this is an extremely simple movement with little or no variation you can set it up with expresso and a couple range mappers.
There is a range mapper tutorial on the C4Dcafe that Vilandra made that might be of some help.
I might be able to load a file a little later.
/Randy

Hi Randy,

I have given it a good crack after following the tutorial you recommended.

I have added a user data slider that now opens the door, triggering the movement of the 2 hinges.

How do I pin those 2 hinges together though as they are still moving apart?

Here is my xpresso file.

Thanks again,

Rich