the basic running of Mythril's clockwork armature made to replace the left arm shi lost, is as follows, will post a more complex hypothetical in a journal

http://www.furaffinity.net/journal/1725390/

nerves change the vibrational tones of crystals, the crystals keep the clockwork and everything else in order, the body's 'waste' electricity powers it all, and a clockwork computer makes sure it all runs how the nerves say it should and switches gear assemblies on and off to regulate movement