摘要:
A method for the mutual displacement of at least two parts of an actuator interconnected by a bridge, and such an actuator. The bridge which connects the two parts and extends parallel to a main surface is locally heated through and through with a temperature gradient which is minimized transverse to the main surface, and is subsequently cooled down whereby the length of the bridge between the parts is reduced owing to the plastic deformation which occurs, so that the parts are displaced relative to one another in a direction parallel to the main surface.
摘要:
A drive chassis has a rotating head drum around which a magnetic tape can be looped and a magnetic head or combined head for reproducing and/or recording signals in the longitudinal track of the magnetic tape arranged between the head drum and the tape drive shaft. A holding device for the magnetic head is constructed so that, on the one hand, it can be easily mounted on the drive chassis and, on the other hand, the magnetic head can be adjusted simply in relation to the position of the magnetic tape above the drive chassis. The magnetic head (H) or combined head (H) is fastened to a carrier plate (1) which can be elastically adjusted above the drive chassis (8) and which can be elastically deflected by adjusting means in order to adjust the azimuthal position and the angle of inclination of the magnetic head (H) for the tape/head contact. Holding device for stationary magnetic heads or combined heads, in particular for video and digital audiotape recorders.
摘要:
A rotary head adjuster for a rotary head (18) having plural head chips adjusts the position of each head chip by making use of partial plastic deformation of a head base (27) caused by laser irradiation. The adjuster comprises stage means (17) for fixing the rotary head (18) composed of plural head chips on a movable stage part, and for moving the stage together with the rotary head; measuring means (13,11) for measuring relative positions across the plural head chips; laser means (14,15,25) for emitting a laser beam and applying the laser beam to the head base (27) and control means (11) for comparing a desired relative position with a result of measurement of positions of individual head chips received from the measuring means, calculating a necessary adjustment amount of each head chip, and setting appropriate laser irradiation conditions to realize deformation of the head base depending on the necessary adjustment amount, and for controlling the stage means and the laser means on the basis of the set laser irradiation conditions.
摘要:
A magnetic head position control apparatus for driving the magnetic head (2) of a disc recording apparatus toward or away from the recording surface of a magneto-optical disc (5) to effect position control of the magnetic head. Changes in the distance between the magnetic head and the magneto-optical disc are detected from changes in capacitance between a capacitance detection electrode (6) mounted on the magnetic head and a surface of the magneto-optical disc. An oscillator circuit (8) connected to the capacitance detection electrode varies its oscillation frequency in response to changes in capacitance and detects such frequency variations and controls the position of the magnetic head for maintaining it at a constant predetermined distance from the magneto-optical disc.
摘要:
A magneto-optical recording and/or reproducing apparatus comprises an optical head (2) for providing a light spot for recording, reproducing and erasing for a magneto-optical disc (1), magnetic head (4) which is disposed at a position opposing to the optical head (2) with the magneto-optical disc (1) therebetween and provides a magnetic field for recording and erasing while maintaining a substantially constant distance from the magneto-optical disc (1) by effecting a lift obtained caused by an air flow generated by the rotation of the disc (1), a loadbeam (24) which has the magnetic head (4) on its one end and serves to provide a force caused by elastic deformation to the magnetic head (4) thereby to be balanced with the lift thus obtained, and a moving mechanism connected to the loadbeam (24). Approaching or evading the magnetic head (4) to or from the magneto-optical disc (1) can be realized by deforming the moving mechanism.
摘要:
Bei einem Verfahren zum Justieren der Spalte von zwei auf einer Kopfscheibe (4) angeordneten, in einer Ebene nebeneinander liegende Magnetköpfen (11, 12), wird ein Trägerplättchen (6) an einem Ende mit einem Schlitz versehen, wodurch zwei von einem Basisteil (8) des Trägerplättchens auskragende Lappen (9, 10) gebildet werden, an deren freien Enden je einer der beiden Magnetköpfe an der gleichen Seitenfläche (13, 14) der Lappen angebracht wird, wonach das Trägerplättchen mit dem Basisteil an der Kopfscheibe befestigt wird, werden zuerst die auf die Spaltbreiten bezogenen Spaltmitten beider Magnetköpfe am Trägerplättchen auf gleiches Niveau (b) gegenüber einer durch die Seitenfläche (17) des Basisteiles des Trägerplättchens gebildeten Bezugsfläche gebracht und anschließend, nach der Befestigung des Trägerplättchens an der Kopfscheibe, mittles einer zwischen dem Basisteil des Trägerplättchens und der Kopfscheibe wirksamen Justierschraube (46) durch Verbiegen des Basisteiles des Trägerplättchens gemeinsam auf ein vorgegebenes Niveau (d) gegenüber der Kopfscheibe justiert (Fig. 7).
摘要:
Bei einem Verfahren zum Justieren der Spalte von zwei auf einer Kopfscheibe (4) angeordneten, in einer Ebene nebeneinander liegende Magnetköpfen (11, 12), wird ein Trägerplättchen (6) an einem Ende mit einem Schlitz versehen, wodurch zwei von einem Basisteil (8) des Trägerplättchens auskragende Lappen (9, 10) gebildet werden, an deren freien Enden je einer der beiden Magnetköpfe an der gleichen Seitenfläche (13, 14) der Lappen angebracht wird, wonach das Trägerplättchen mit dem Basisteil an der Kopfscheibe befestigt wird, werden zuerst die auf die Spaltbreiten bezogenen Spaltmitten beider Magnetköpfe am Trägerplättchen auf gleiches Niveau (b) gegenüber einer durch die Seitenfläche (17) des Basisteiles des Trägerplättchens gebildeten Bezugsfläche gebracht und anschließend, nach der Befestigung des Trägerplättchens an der Kopfscheibe, mittles einer zwischen dem Basisteil des Trägerplättchens und der Kopfscheibe wirksamen Justierschraube (46) durch Verbiegen des Basisteiles des Trägerplättchens gemeinsam auf ein vorgegebenes Niveau (d) gegenüber der Kopfscheibe justiert (Fig. 7).
摘要:
Shown is a disk drive arrangement with servomechanism for controlling (thin film) head position, etc.; the servo having a disk face dedicated to servo tracks, rendered in "Quad" code, with special timing indicia to separate position indicia. A feature is a technique for deriving and using "offset" values for an array of servo tracks.