Electrical centering and boring system for transducers

Electricity: motive power systems – Positional servo systems – Frequency- or phase-modulated systems

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Details

29271, 33181R, 318653, 408 13, 408 16, B23B 4900, H02K 1516

Patent

active

040164705

ABSTRACT:
Method and apparatus for accurately positioning a blank angular position transducer element for boring at its center. A relatively high frequency carrier signal is applied to the blank transducer element to be bored and is thereby induced in a master rotor element which is rotated at a constant speed in an operative relationship with the blank. The rotor is made deliberately eccentric with respect to its axis of rotation, and the induced signal contains a carrier signal, a component indicative of relative angular position, and a once-per-revolution eccentricity error component, if the blank element is also eccentric with respect to the axis of rotation. Error detection circuitry isolates the once-per-revolution eccentricity error component, and resolution circuitry resolves it into x and y directions for application to error display devices, or to actuators connected to move the blank transducer element automatically until the x and y components are both zero. The blank element can then be bored by a tool movable along and rotable about the axis of rotation.

REFERENCES:
patent: 2580674 (1952-01-01), Griffin
patent: 3217568 (1965-11-01), Graffenreid
patent: 3349303 (1967-10-01), Burnight et al.
patent: 3798757 (1974-03-01), Hennessey et al.

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