System for restoring numerically controlled machine tool to form

Details System for restoring numerically controlled machine tool to form System for restoring numerically controlled machine tool to form

1981-09-23

1984-11-20

Ruggiero, Joseph F.

Boots, shoes, and leggings

318563, 318632, 364170, 364184, G06F 1546, G05B 1918

Patent

active

044842872

ABSTRACT:
A system for restoring a numerically controlled machine tool to its former condition after a power interruption, the numerical control system being of the type in which a position sensor senses the current position of a movable member or of a drive motor of the machine tool and generates a current position signal in accordance with said current position, the movable member being positioned on the basis of a commanded position signal and the current position signal. The positional control information which prevails immediately prior to an interruption in the electric power which is applied to the machine tool and to the numerical control device is stored in a non-volatile memory before the power interruption occurs. When the electric power is reintroduced, the positional control information is read out of the non-volatile memory, and the movable member is returned to the position which it occupied immediately prior to the power interruption, this being accomplished on the basis of the positional control information and the current position signal.

REFERENCES:
patent: 3691357 (1972-09-01), McIntosh
patent: 3802622 (1974-04-01), Nishimura et al.
patent: 3890494 (1975-06-01), Meshek et al.
patent: 4045660 (1977-08-01), Weisgerber et al.
patent: 4055787 (1977-10-01), Beadle et al.
patent: 4107654 (1978-08-01), Nishijima
patent: 4370705 (1983-01-01), Imazeki et al.

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