Use of motion constraints for robot's movement simulation I am new to Blender with very basic knowledge. I am working on some robotic simulation for which I already have models, for environment and the robotic unit. The robotic unit has to be mounted on metallic frame, over which the robotic unit has to slide. As shown in this video.

Can someone bluntly guide me through the steps for achieving such a simulation. Especially on the use motion constraints. I am aware of the various constraints Blender provides but not sure which one could give me the similar kind of movement of the robot on the frame, as in the video. Please help me out. Thanks !!
In a simple case like the example you can use Limit_location constraint on one axis , but for more general case you can use the follow path constraint



to get the previous configuration :


add follow path constraint with the following settings then click animate path





to take coontrol of the robot position you have to check Fixed position  and use the Offset slider to animate it.
for precise movement, the curve used for constraint is the same one used for creating the frame 
the frame is created with Array modifier and curve modifier as follows :