Malfunction detecting system

Details Malfunction detecting system Malfunction detecting system

1979-04-27

1981-06-09

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

340679, G05B 2302

Patent

active

042727111

ABSTRACT:
In a numerical control unit which has an interpolation function from generating command pulses in response to a distribution command and a servo system for driving a movable part of a machine in accordance with command pulses, a comparison is made between the error of the servo system a predetermined period of time after the distribution command is switched off and a preset value; when the error of the servo system is larger than the predetermined value, an alarm signal is produced to detect the occurrence of a malfunction.

REFERENCES:
patent: 3633087 (1972-01-01), Vawter et al.
patent: 3719878 (1973-03-01), Ferguson et al.
patent: 4130787 (1978-12-01), Allaire et al.
patent: 4163930 (1979-08-01), Lachaussee

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