Patent ID: 6083082
Filing Date: 2000-07-04
Classification: B24B,G05B

Abstract:
A spindle assembly for force controlled processing of a workpiece, the force controlled spindle assembly comprising:a holding device for holding the workpiece;an axially movable spindle, the holding device connected to one end of the axially movable spindle;a load cell mounted on the holding device, the load cell positioned to sense a pressure applied to the workpiece and produce a load sense signal representative of the pressure applied;a force producing device operatively coupled to the axially movable spindle, the force producing device configured to impart a force along a longitudinal axis of the spindle;a positional transducer operatively connected to the spindle, the positional transducer positioned to sense an axial position of the spindle and produce a position signal representative of the axial position of the spindle; anda servo controller in communication with the positional transducer via a first feedback loop for receiving the position signal, in communication with the load cell via a second feedback loop for receiving the load sense signal, and in communication with the force producing device, wherein the servo controller controls the force producing device based on one of the position signal and the load sense signal.