Abstract
The study deals with the development of a tool position control device by means of a piezo-electric actuator and the compensation method of machining errors in turning. The tool position control device is mounted at the tool post of an NC lathe linked to a personal computer for DNC. The voltage control of the piezo-electric actuator by the personal computer makes it possible to slightly move the tool position in the depth of cut. The movement of tool on the basis of the machining errors leads to the improvement of machining accuracy. From experimental results concerning to cylindrical workpieces, it is found that the device has the potential of improving the machining accuracy.
