SU720527A1 - Device for controlling tape transport mechanism - Google Patents

Description

(54) DEVICE FOR CONTROLLING THE TAPE MECHANISM

I

This invention relates to a magnetic recording technique, in particular, to drive control devices for a carrier.

A device for controlling a magnetic recording apparatus is known in which counters are installed, a command unit and a unit comparing the counter signals with the signals of the command block 1.

The disadvantage of the device is the low stopping accuracy due to the change of the stick out belt.

The closest to the invention in technical essence and achievable results is a device containing a block of command signals, an electric motor connected via an amplifier to a block of command signals, a position sensor connected to an electric motor, a position counter connected by a counting input to the position sensor, and outputs - to the block of command signals 2.

This device has the same disadvantage as the first one.

The aim of the invention is to improve the accuracy of the stop media.

For this purpose, the proposed device is equipped with three assembly circuits, two coincidence circuits and a trigger, the inputs of the assembly circuits are connected to the outputs of the counter, the outputs of the first i g / slides of the shel; the assembly is connected to the first inputs of the matching circuits, the second inputs of which are connected to the block of command signals, and the outputs to the control inputs of the trigger, the reset input of which is connected to the output of the third assembly circuit, and the output to the block of co-command signals.

The drawing shows a block diagram of the proposed device.

The device contains a bloc 1 coma} of other signals, elec1; one input /: 2. amplifier 3.

 4 ALREADY 1 P and Clf-llMi; 1OZhSN ;; K.

The device with-; lbzhen1) accounts 6o

assemblies, circuits 9 and iO soB 1ydenn and trigger 11.

The inputs of circuits 6 - S are connected to the outputs of the counter 5. Enho ,, 1. circuit diagrams 6 and 7 and dvkklchen; to the first ENTRANCE CXCNT 9 and 10: -oppa ;; e and. the outputs of which are connected to the control inputs of the trigger 11. The output of the assembly circuit 8 is connected to the reset input — the trigger output 11 of the trigger 11 is connected to block 1.

The device works well.

From the moment of the command of the OST / iPBi command to io, the stopping of the carrier to the counter; c; and: - | -chik; 4 pop, bouting, si1-nalg webs displacement, 1yu.te; 1 forward (backward; fire of the middle position at the output of circuit 6 (7)) is a signal that through cxeMv S (Yu) coincidence the trigger 11, from which The ojioK I and the amplifier 3 are fed to the motor 2 by a carrier position correction signal.

In the absence of mixing of the carrier relative to the average position at the output of cxervibj 8 of the assembly, the signal by which the trigger i 1 is reset and the correction of the motor 2 decreases.

11: Finding can improve the accuracy of stopping the carrier due to the co;) response | 1ol {) of the latter.

signals, an electric motor connected through an amplifier to a block of command signals, a position sensor connected to an electric motor, a position counter connected by a counting input to a position sensor, and a control input and outputs to a block of command signals, characterized in that accuracy of carrier stoppage, it is equipped with three assembly schemes, two coincidence schemes and a trigger, inputs of eborka circuits are connected to the counter outputs, outputs of the first and second assembly circuits are connected to the first inputs of the coincidence circuits, orye inputs are connected to the power command signal, and outputs - to the control inputs of the flip-flop whose reset input is connected to the output of the third circuit assembly, and an output unit -k command signa.chov.

Sources of information taken into account in the examination

1.Patent of Japan Ha 47-50161. cl. ) 02Е212.1, onlib. 1972.

2. USSR author's certificate

M 455365, ju. G 11 B 5/02, 1973 (prototype). . --J., .-G

Claims (1)

Claim A device for controlling a tape drive mechanism comprising a block of command signals, an electric motor connected through an amplifier to a block of command signals, a position sensor connected to the electric motor, a position meter connected by a counting input to the position sensor, and a control input and outputs to the block of command signals, characterized in that, in order to increase the accuracy of stopping the medium, it is equipped with three assembly circuits, two matching circuits and a trigger, the inputs of the assembly circuits are connected to the outputs of the counter, output rows of first and second circuit assemblies are connected to first inputs of the coincidence circuits second inputs of which are connected to the power command signal, and outputs - to the control inputs of the flip-flop whose reset input is connected to the output of the third circuit assembly, and the output - · command signals to the unit.