Position control apparatus for circular tables

Details Position control apparatus for circular tables Position control apparatus for circular tables

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

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