Driving signal control circuit

Details Driving signal control circuit Driving signal control circuit

1977-07-21

1979-01-02

Hohauser, Herman J.

Electricity: motive power systems

Positional servo systems

Limit or end-stop control

318282, 318611, 318467, G05G 500

Patent

active

041329392

ABSTRACT:
This invention relates to a driving signal control circuit, in which at least four detecting points (or detectors) are arranged for detecting the position of the working table, which is repeatedly reciprocated between the detecting points. The control circuit includes a clock generator for generating a clock signal in accordance with a start signal, a gate circuit operative in response to detecting signals derived from the detectors when the working table has reached the detecting points, for selectively applying the clock signal as an Up output signal or a Down output signal and for providing a switching signal, a counter circuit for adding the Up output signal or for subtracting the Down output signal, a digital-to-analog converter for converting a digital output signal of the counter circuit into an analog signal, and a switching circuit operative for generating a driving signal with negative polarity or positive polarity in accordance with the switching signal and corresponding to the analog signal in value, whereby the working table can be smoothly moved by the driving signal without generating mechanical vibration in the working table.

REFERENCES:
patent: 3795853 (1974-03-01), Whitehouse
patent: 4078198 (1978-03-01), Murakosi et al.

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