Shock start for memory disk motor drives

摘要

A method and apparatus for starting mechanisms such as memory disk and head arrays driven by driving mechanisms such as motors that are initially immobilized by constraints such as stiction in disk drives wherein the system is perturbed by a succession of mechanical shocks while a moderate driving force is applied thereby degrading the strength of the restraint to a value where a moderate driving force can drive the mechanism indicating that the restraint has been overcome then increasing the driving force to a full operating value. In one embodiment, the shock is provided by a loaded spring; in another embodiment, the shock is provided by a solenoid; in another embodiment, the shock is provided by a voice coil.