Device for controlling the feed of machine tools

Details Device for controlling the feed of machine tools Device for controlling the feed of machine tools

1979-07-05

1982-03-30

Truhe, J. V.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318332, 318432, 318626, 318163, 318467, G05B 1925

Patent

active

043226698

ABSTRACT:
An apparatus for controlling a DC motor driven screw feed which moves the table of a machine tool into prescribed positions including a plurality of limit switches which detect the position of the table, a rate change control circuit which receives signals from the limit switches and changes the rate of revolution of the DC motor when the table has reached prescribed rate change positions and a current limiting circuit which supplies the DC motor with a prescribed constant current and keeps the output torque of the DC motor at a prescribed level when the table has reached a prescribed dwell position.

REFERENCES:
patent: 3191205 (1965-06-01), Gilbert
patent: 3733961 (1973-05-01), Reynolds
patent: 3735226 (1973-05-01), Pittner
patent: 3857079 (1974-12-01), Wake et al.
patent: 3955130 (1976-05-01), Graf
patent: 4019107 (1977-04-01), Dixon et al.
patent: 4182979 (1980-01-01), Douglas et al.

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