SU419981A1 - - Google Patents

Description

(54) DEVICE FOR RECORDING ON A MAGNETIC DRUM

one

The invention relates to the field of magnetic recording, in particular to spectrum traversing equipment and a magnetic drum.

Magnetic drum recorders are known in which fluctuations in the speed of rotation of a magnetic drum are reduced by virtue of the fact that the magnetic drum drive, in addition to a synchronous motor and an electromagnetic clutch, contains an additional synchronous electric motor and a nestle clutch.

To improve the accuracy of transporting the recorded and reproducible signals, the proposed device is mounted with a frame mounted freely on the 6apa6aiia axis and a straight line motor, a shaft with a magnetic shaft that is freely connected from one side to its sides. heads.

FIG. 1 and 2, the device described is described in terms of its magnetic drum 1, made in the form of a rotor of an engine 2 with a stator, holder 3, magnetic heads 4, rigidly attached to frame 5, which is mounted on shaft 6. A chain consisting of from the tracking sensor 7, the converter 8, the phase-sensitive unit 9 and the amplifier 10, controls the rectilinear motor 11. The driving motor 2 is controlled

control unit 12. Frame 5 is connected to the shaft 13 of the engine 11 at the HOMOHUI kinematic unit 14.

The device works as follows.

When the magnetic drum 1 rotates, the torsional vibrations are detected by the tracking sensor 7 and are converted in the transducer 8. The signal is then fed to the phase-sensitive unit 9 to determine the phase of the rotational vibration signal. The signal is amplified in the amplifier 10 and fed to the engine 1 (engine), the shaft 13 of which, depending on the magnitude and phase of the torsional vibration signal, rotates the head 5 with the holder 3 magnetic heads 4.

Thus, the oscillatory movement of the holder 3 with the magnetic heads 4 along a nanowireline parallel to the component of the magnetic drum, it appears that the timing of the information is corrected in terms of the magnitude and sign of the irregularity Lies 1, enn. The holder 3 with magnetic heads 4 performs oscillatory movements in a small area, occupied by a single angle a, since the fluctuations of the speed of rotation of the mapping drum do not go beyond the limit of the nominal speeds of rotation Vl or Vo. Rotation of the magnetic drum at two speeds will be reduced by the help of the control unit 12 and the selection of the synchronous motor 2. Thanks to this, you can get high-quality recording of information on the magnetic drum.

Subject invention

A device for recording a magnetic drum containing floating magnetic heads mounted on a holder and a drive motor, the winding of which through a series-connected amplifier, phase-sensitive unit and converter is connected to a tracking sensor located in the immediate vicinity of the working surface of the rotating magnetic drum, characterized by that, in order to catch the transonon accuracy of the recorded and reproducible signals, it is equipped with a frame set freely axis of the drum and the motor rectilinear displacement, which shaft is loosely coupled with one of its sides, while on the other side of the frame generatrix placed iarallelno holder with the magnetic heads.