When the Hubble Space Telescope turns its solar panels to the sun, it uses the same motion control technology that enables a six-axis robot to perform a series of spot welds quickly, accurately and repeatably.
That's because the robot and the telescope share a common design problem: How to get high torque capacity, torsional stiffness and positioning accuracy out of a servomotor, without adding a lot of weight or taking up too much space. For both applications, that problem was solved with harmonic-drive gear systems.