Patent ID: 6758640
Filing Date: 2004-07-06
Classification: B23Q,G05B,Y10S,Y10T

Abstract:
A method of controlling a relative movement of a cutting blade and a workpiece which are moved relative to each other by a movement device in an operation with a machine tool, said method comprising a step of bringing said cutting blade and an object into contact with each other, by moving at least one of said cutting blade and said object toward each other by said movement device, and a step of controlling said relative movement on the basis of a relative position of said cutting blade and said object which is detected by said movement device upon said contact of said cutting blade and said object with each other, said method further comprising:a checking step of checking, with a checking device if a contact detecting device for detecting said contact of said cutting blade and said object is in a normal condition in which said contact detecting device is capable of detecting said contact when said cutting blade and said object are brought into contact with each other; and a contact determining step of determining that said cutting blade and said object have been brought into contact with each other, in accordance with an output provided by said contact detecting device.