Patent ID: 6759825
Filing Date: 2004-07-06
Classification: G05B

Abstract:
A feed system control method for controlling the operation of a feed system which comprises a drive mechanism for moving a slide along a straight line, a servo motor for giving power to said drive mechanism, a rotational position detection means for detecting the rotational position of said servo motor, and a position detection means for detecting the position of said slide, wherein said control method is provisioned to perform the processing of:calculating position errors before and after a reversal in direction of movement of said slide, each from a difference between the position data of said slide detected by said position detection means and the position data of said slide calculated from the rotational position data of said servo motor detected by said rotational position detection means; subsequently, calculating a backlash amount for said drive mechanism from a difference between said calculated position error before said reversal and said calculated position error after said reversal; and increasing feed speed during direction reversal in accordance with said calculated backlash amount when reversing the direction of movement of said slide.