Mechanical rigging problem

[Anonymous]

Hey Folks

I hope you are all well. I am having an issue rigging a camera motion control rig. In essence the rig is a real life rig. I am hoping to give the real rig rotational and position instructions from a 3d one to recreate camera moves. To that end I am trying to create a rig that is controlled by the camera end of the arm. The rig has an upright on a turn table that rotates in the y axis and a jib connected to that upright that rotates in the z axis. When I try to move the camera up or side to side the rig pulls away from the controller due to the fact it is on 2 rotational axis. What I would like to happen is if I move the camera up or side to side the entire rig travels down the track to compensate. The forum wont let me attach a vimeo link to a video so here is the URL where I explain the issue further.

https://vimeo.com/341171923/b318c840cd 

[stephenkmann]

You could try driving the X value of the slider to the X value of the main control

 in real life you probably wouldn't drag a dolly along a track by it's head.. but you could try adding an expression for when the boom rotates to parallel positions , that it then engages the X trans of the dolly, 

or use an if/then node to determine when to slide.... 

 basically if you are within 75 and .1 degree the Head control should not move the dolly, but.. if it is above or below those values, then it should move along the dolly

similar to a stretchy limb rig.. once the distance is met. then it engages the X value.

hth

-=s

[Anonymous]

Hi Stephen

Thanks for taking the time to reply to my problem. I will try your suggestion. Many thanks.