Control system for stopping spindle at predetermined rotational

Details Control system for stopping spindle at predetermined rotational Control system for stopping spindle at predetermined rotational

1980-12-15

1983-09-06

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With compensating features

318653, 318663, G05D 23275

Patent

active

044031793

ABSTRACT:
A control circuit for stopping a spindle at a predetermined rotational position, of the type having a position sensor for producing a zero volt signal when a specified point on the spindle arrives at the predetermined rotational position, and for producing a voltage which is positive or negative when the specified point on the spindle is in the vicinity of the predetermined rotational position on either the left or right side thereof. The control circuit includes an orientation control circuit for stopping the spindle drive motor when the output signal from the position sensor attains the value of zero volts, thereby stopping the specified point on the spindle at the predetermined rotational position. The control circuit further includes a position adjustment circuit for adjusting the rotational position, of the specified point on the spindle, at which the output signal from the position sensor crosses the zero volt line. The position at which the specified point is stopped is adjusted by the position adjustment circuit, so that it is possible to correct an error in the stopping position which results from a position sensor mounting error.

REFERENCES:
patent: 3393588 (1968-07-01), Broome
patent: 3449554 (1969-06-01), Kelling
patent: 3581204 (1971-05-01), Martin
patent: 3593091 (1971-07-01), Ross
patent: 4251761 (1981-02-01), Inoue
patent: 4334178 (1982-06-01), Lipp

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