Patent ID: 7633255

Claim:
A movement controller, for use in a machine tool having at least one mobile body movable between a first position and a second position in a coordinate system containing mutually perpendicular first and second axes, and a first axis driving unit and a second axis driving unit for moving the mobile body in directions parallel to the first and second axes, respectively, the movement controller being configured to control the first axis driving unit and the second axis driving unit so that the mobile body moving between the first position and the second position passes through at least one direction change point that does not lie on a straight line joining the first position to the second position, wherein the movement controller comprises a driving control section for controlling the first axis driving unit and the second axis driving unit so that after the mobile body has reached the at least one direction change point, the first axis driving unit accelerates and decelerates the mobile body in the first-axis direction with an acceleration and deceleration smaller than a predetermined first maximum acceleration and first maximum deceleration that the first axis driving unit can provide, and so that the acceleration and deceleration is performed continuously over a part or the entire length of the time during which the second axis driving unit is driven after the direction change point is reached.