Problem with revolute joints.

[RogerInHawaii]

I'm designing a finger for a robot hand. I use a lot of gears with revolute joints, some rigid joints, and Motion Links between the joints. Some of it's working but some, .. not. These pictures explain what I'm trying to do...

Here's what happens when I add the Motion Link between those two intermediary gears (joints).

So, what am I doing wrong? Do I need some more, maybe different kinds of, joints?

[jhackney1972]

Please attach your model so others can troubleshoot it.

[RogerInHawaii]

Here's my project file, attached...