Rigging and animating

So with my Mech model to rig it I used joints and did not soft or rigid bind them but children the meshes under the parent joints. I wanted to rigid bind them but the arm movements wasn't working properly so with help from my tutor he said it would be a good idea to go with children and parents. I then made a very very basic walk sequence and hope to do many more animations and use something called Maya Trax editor to do multiple animation movements.

I upload a video to YouTube of my first ever 3D animation sequence.