Numerical control system

Details Numerical control system Numerical control system

1972-11-14

1976-02-17

Lynch, T. E.

Electricity: motive power systems

Positional servo systems

Digital or numerical systems

318618, G05B 1930

Patent

active

039393909

ABSTRACT:
Numerical control means for controlling the position of a machine tool or the like by means of a servomotor are described. A position command signal is compared to the signal indicative of the servomotor position, and the resultant error signal is added to a speed command signal to control the speed of operation of the motor. A follow-up signal is generated whenever the amplitude of the error signal exceeds a predetermined level, and the latter is added to a digital position signal coupled to the system. A constant digital signal generated by said follow up signal is added to said error signal instead of said speed signal.

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patent: 3566241 (1971-02-01), Ross
patent: 3684940 (1972-08-01), Lutz

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