METHOD FOR RETURN TO ORIGIN OF NC FINISHING MACHINE

摘要

PURPOSE: To enable each movable member to return to an origin by manipulation of simple operations without using an expensive absolute type encoder. ;CONSTITUTION: Let each movable member 10 return to an origin by using a back-up memory 29 which write data for the present value of each movable member 10 driven by a servo-motor 13 at all times. When a power supply is turned on again after it has been turned off, it is judged whether or not each movable member 10 is in a range β capable of returning to the origin based on data for the present value stored in the back-up memory 29. When each movable member 10 is found to have been in the range β capable of returning to the origin, let it directly return to the origin. And when it is found to have been in a range α incapable of returning back to the origin, it is moved to the range α once, then let it return to the origin.;COPYRIGHT: (C)1993,JPO&Japio