Patent ID: 6147468
Filing Date: 2000-11-14
Classification: G05B

Abstract:
A servo control method for orbital machining comprising the steps of:moving a spindle and a work by way of a shaft control to make a relative displacement to each other along a plane perpendicular to an axis of rotation of a spindle, such that a mutual interpolation motion is achieved between the spindle and the work;controlling a rotation angle of the spindle quantitatively and synchronously to have a predetermined correlation to the shaft control so that, at any angular position in rotation of the spindle, a blade direction of a cutting tool is maintained in a preset direction to thereby achieve a cutting into a configuration to be defined by an interpolation locus based on the mutual interpolation motion;controlling a first servo motor for moving a feed shaft to feed the work;controlling a second servo motor for moving the spindle having the cutting tool attached thereto for the orbital machining of the work;compensating for a first follow-up delay in said controlling of the first servo motor, in a feed forward manner; andcompensating for a second follow-up delay in said controlling of the second servo motor, in a feed forward manner.