Gap eliminator

Details Gap eliminator Gap eliminator

1976-03-29

1978-12-05

Dobeck, B.

Electricity: motive power systems

Positional servo systems

'sampling' systems including miscellaneous 'sampled data'...

318 39, 318563, 318571, G05B 2102

Patent

active

041287967

ABSTRACT:
There is disclosed a gap eliminator used for reducing working cycle time in machine tools. With over-all voltage variations in power sources in a factory taken into consideration, an output .function.(t.sub.0) under no or light load condition of an electric motor and an output k.function.(t) obtained by attenuating an output .function.(t) under loaded condition by an attenuator circuit are compared with each other to provide a primary signal, by which the feed rate is controlled. In this operation, particularly when an output obtained through a detecting circuit is an electric power, a circuit for eliminating periodic noise is disposed immediately after the electric power detector in order to eliminate adverse effects on power waves of periodic noise due to a belt. Further, abnormal overload condition is detected to provide a secondary signal, by which the machine is brought to a stop. Other merits and details of the arrangement will be made clear.

REFERENCES:
patent: 3544875 (1970-12-01), Hara et al.
patent: 3545310 (1970-12-01), Porath et al.
patent: 3614575 (1971-10-01), Cutler
patent: 3626262 (1971-12-01), Kelling
patent: 3727120 (1973-04-01), Jewell et al.
patent: 3805137 (1974-04-01), Fahrner
patent: 3880352 (1975-04-01), Ishida et al.
patent: 4000448 (1976-12-01), Shum et al.

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