Position-correctable numerical control system

Details Position-correctable numerical control system Position-correctable numerical control system

1976-07-06

1978-07-18

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Digital or numerical systems

318632, G05B 1928

Patent

active

041018176

ABSTRACT:
In a position-correctable numerical control system for machines without any device for detecting the absolute position of an object to be controlled, a plurality of equidistantly-spaced reference marks providing standard ranges of control of the object are determined by a reference mark detection pulse generator. Reference positions corresponding to the reference marks are stored in advance in a non-volatile memory. The actual position of the object is compared with a reference position stored in said non-volatile memory, each time the object to be controlled passes each of the reference marks, so that the actual position of the object is corrected in accordance with a difference, if any, between the actual position and the reference position.

REFERENCES:
patent: 3781629 (1973-12-01), Yashimoto et al.
patent: 3896361 (1975-07-01), Inaba et al.
patent: 3911347 (1975-10-01), Hartung

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