METHOD FOR DETERMINING A POSITION CHANGE OF A TOOL AND THE TOOL AND THE TOOL UNIT

摘要

PURPOSE: A position change measuring method of a tool, a tool thereof, and a tool control device are provided to respond to various operation conditions and a frequent position shift by conveniently measuring position setting and position changes. CONSTITUTION: A first position vector is determined by measuring a gravity acceleration component in an axial direction of a tool. An angle difference with a newly set second position vector is measured so that a change of a position is determined when changing the positon of the tool. Information on an alignment of the tool, which is determined from the angle difference, is supplied.