Abstract: A system and method are described for holding and releasing a workpiece for electrochemical machining. In one embodiment, a workpiece holder has a workpiece surface that couples to the workpiece when negative pressure is applied to provide a seal between the workpiece and the workpiece surface. A plenum located within the workpiece holder has a proximal end capable of being removably coupled to the workpiece. A piston is configured to move upward in the plenum and to lift the workpiece off of the workpiece surface in response to positive pressure being applied.

Abstract: An apparatus, method and means is provided for electrochemical machining of hydrodynamic bearing assemblies in spindle motors. In an aspect, a cartridge is provided that receives and accurately positions an electrode in three dimensions in a near frictionless manner. The electrode reaches and maintains an equilibrium position in response to a first and second predetermined force, the equilibrium position being a predetermined three dimensional orientation relative to the work piece and defining a critical orifice with the work piece. In an aspect, a hydrostatic bearing is employed within the electrode for radially adjusting the electrode.

Abstract: An apparatus, method and means is provided for electrochemical machining of hydrodynamic bearing assemblies in spindle motors. In an aspect, a cartridge is provided that receives and accurately positions an electrode in three dimensions in a near frictionless manner. The electrode reaches and maintains an equilibrium position in response to a first and second predetermined force, the equilibrium position being a predetermined three dimensional orientation relative to the work piece and defining a critical orifice with the work piece. In an aspect, a hydrostatic bearing is employed within the electrode for radially adjusting the electrode.

Abstract: A system and method are described for holding and releasing a workpiece for electrochemical machining. In one embodiment, a workpiece holder has a workpiece surface that couples to the workpiece when negative pressure is applied to provide a seal between the workpiece and the workpiece surface. A plenum located within the workpiece holder has a proximal end capable of being removably coupled to the workpiece. A piston is configured to move upward in the plenum and to lift the workpiece off of the workpiece surface in response to positive pressure being applied.