Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1977-09-19
1979-02-06
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318664, 364474, G05B 1928
Patent
active
041386337
ABSTRACT:
An angular position control apparatus for a machine tool circular table comprises a circuit for discriminating whether a command from a command register is such that the output from an absolute position detector for the table passes over the figure zero and an angular converter for converting a present or stopped position of the table detected by the position detector into an angular value. The output of the angular converter is compared with the command to drive the circular table. The resulting compared difference controls the clockwise or counterclockwise rotation of the table and table rotation in the neighborhood of the figure zero of the position detector is smoothed.
REFERENCES:
patent: 3333089 (1967-07-01), Saylor et al.
patent: 3448360 (1969-06-01), Pohl
patent: 3564379 (1971-02-01), Bakel et al.
patent: 3569815 (1971-03-01), McNaughton
patent: 3573589 (1971-04-01), Berry
patent: 3826964 (1974-07-01), Byrne
patent: 3843915 (1974-10-01), Helmbold
Baba Osamu
Narikiyo Yasumasa
Chaskin Jay L.
Dobeck B.
Okuma Machinery Works Ltd.
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