Numerical control system having a digitized phase loop

Details Numerical control system having a digitized phase loop Numerical control system having a digitized phase loop

1975-08-06

1977-05-10

Schaefer, Robert K.

Electricity: motive power systems

Positional servo systems

Frequency- or phase-modulated systems

318603, 318661, G05B 103, G05B 1928

Patent

active

040230856

ABSTRACT:
A numerical control system having a digitized phase loop comprising a motor for moving an object being controlled, a servo amplifier for driving the motor, feedback means coupled to the motor for generating a first signal indicative of the actual position of the object, and means for converting the first signal to a digital signal indicative of a change in the actual position of the object. Further provided is means for comparing a command digital signal indicative of the desired change in position of the object with the digital signal indicative of the actual change in position of the object to generate an error digital signal and for converting the error signal to an analog signal for driving the servo amplifier.

REFERENCES:
patent: 3473098 (1969-10-01), Waller

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