I need help animating multiple rigid body hinge joints I need to animate a hinge mechanism with multiple other dynamic hinge joints following in sequence to the original. 



I have no problem animating the first hinge mechanism. 



However, when I add more hinge constraints to the original mesh,

the animation breaks apart like so.



Things I have tried:

Altering rigid body collision settings.

Altering the angle of the empty containing the rigid body relationship.

Altering the parent relationships amongst the objects involved.

Files

MULTI_HINGE OBJECT 

https://drive.google.com/open?id=10gEugUDgIC-xrCC2Y8tFyysSu2gT5tV2

SINGLE HINGE OBJECT 

https://drive.google.com/open?id=12kYQTq2pDsGzSlwUroCrDcyR8KYgqJQS

Any insight would be appreciated. Thank you
You have a cube in the first layer that is bouncing off the physics of the arm. Delete that cube and you'll be fine.