METHOD AND DEVICE FOR PREPARING ERROR MAP AND NUMERICALLY CONTROLLED MACHINE TOOL HAVING ERROR MAP PREPARATION FUNCTION

摘要

In a numerically controlled machine tool which has a linear feed axis (X,Y,Z) and a rotational feed axis (A,B,C) and in which a main spindle (4) and a table (6) are movable relative to each other, a position error (34a) and an attitude error (34b) produced by an operation of a linear feed axis (X,Y,Z) and a rotational feed axis (A,B,C) are measured at a plurality of measurement points set within a movable range of the linear feed axis (X,Y,Z) and the rotational feed axis (A,B,C), and the position error (34a) and the attitude error (34b) thus measured are stored as an error map in correspondence to a position of the linear feed axis (X,Y,Z) and a rotation angle of the rotational feed axis (A,B,C).