초록 ▼

An automatic dynamic error compensator for compensating the position error arising within a servo drive system includes a measuring head which is operative to measure the relative indicated position of two or more measuring vanes on the movable member. The measuring head, together with a feedback tr

An automatic dynamic error compensator for compensating the position error arising within a servo drive system includes a measuring head which is operative to measure the relative indicated position of two or more measuring vanes on the movable member. The measuring head, together with a feedback transducer, that measures indicated movable member position, are coupled to a feedback system. The feedback system determines the indicated movable member position from the feedback transducer reading and then compares the indicated movable member position to the known vane position upon occurrence of a vane crossing to yield a compensating value.

대표청구항 ▼

In a machine tool controlled by a numberical control circuit comprising: a base, a movable member carried by said base for movement in a prescribed path of travel, a servo positioning system connected to drive the movable member along its path of travel in accordance with commands received from a re

In a machine tool controlled by a numberical control circuit comprising: a base, a movable member carried by said base for movement in a prescribed path of travel, a servo positioning system connected to drive the movable member along its path of travel in accordance with commands received from a recorded program, a transducer responsive to the movement of the movable member for producing a position signal which represents the indicated position of the movable member at any instant of time, the improvement comprising, a position verifier actuated by the passage of said movable member past a predetermined point on said base to produce a verifier signal indicating a precise actual position of the movable member at the instant said verifier signal occurs, a feedback processor coupled to receive the position signal from said transducer, means coupling said feedback processor to receive the verifier signal from said position verifier, means in said feedback processor for determining the difference between the indicated position of the movable member as represented by said transducer position signal and the actual position as represented by said verifier signal and to generate therefrom a compensation factor signal, and adjustment means in the numerical control circuit connected to receive said compensation factor signal for adjusting the control of the movement of the movable member so that it is precisely positioned according to the command from the program.