Martin's right, 3D Studio and Animator Pro are more complementary. Animator Pro
excels in 2D paint and animation whereas 3D Studio is ideal for doing what you
want: < make simple machines and cause the parts to roll, twist, grind,rotate
etc (ie move) in 3d. > If you have an Autodesk dealer near you, drop by and
pick up some literature on the two packages or call Autodesk.
Jh