SU1499519A1 - Device for monitoring parameters of character-generating unit of printer - Google Patents

Abstract

The invention relates to telegraphy. The purpose of the invention is to simplify the device while expanding its functionality. The device contains a master r-1, a divider 2 frequencies, a trigger 3, a block 4 of power amplifiers, a controlled sign-synthesizing node 5, a sensor 6 pulses, a block 7 of indication, a switch 8, waiting for multivibrators 9 and 10, a switch 11 and el-I 12. Simplification of the device is achieved by reducing the total number of e-mails in the device. Expansion of functionality is achieved by providing diagnostics of the nature of a failure with the help of the entered switch 8, the waiting multivibrators 9 and 11, and the ele- ment I 12. 2 ill.

Description

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The invention relates to telegraphy and can be used in test equipment for means of recording alphanumeric information.

The purpose of the invention is to simplify the device by reducing the total number of elements while simultaneously expanding the functional possibilities by providing diagnostics of the nature of the failure.

FIG. 1 shows the structural electrical circuit of the proposed device; in fig. 2 - structural electrical circuit, display indicator. The device for monitoring the parameters of the printing unit's sign-synthesizing unit contains a reference generator 1, a divider 2 frequencies, a trigger 3, a block 4 of power amplifiers, a controlled sign of the synthesizing node 5, a sensor 6 of pulses, a display 7, a switch 8, the first 9 and the second 10 are waiting multivibrators, switch 11, element 12 and input 13, and the display unit 7 contains the elements 14, triggers 15 and the elements 16 display.

The device works as follows.

When the power is turned on, the trigger 3 is set to one state by the initial setup signal (not I shown). At the same time high potential; Dial from trigger output 3, entering the reset input of splitter 2 frequency,. sets it to zero and denies work. The pulses from the output of the master oscillator 1, arriving at the input of the divider 2 frequency, do not cause it to switch. The initial setup signal also resets all triggers of block 7 and indication to the zero state. Therefore, all display elements 16 are turned off. The device is in its original state.

When the trigger start signal arrives at the device 13, the trigger 3 is set to the zero state, allowing the divider to operate at 2 frequencies and, consequently, the entire device. The pulses from the low-frequency output of the frequency divider are fed to the input of the first 9 and second 10 multivibrators. Pulses from the outputs. : Senior bits Divider 2 PostZ frequencies (T1 per address more than switch inputs

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torus 8, alternately commute a pulse from the output of the first common multivibrator 9 to the inputs of the block 4 power amplifiers. These pulses set the duration of the electromagnet pulses, their duration is provided by the parameters of the first standby multivibrator 9 and can vary if necessary over a wide range. The speed of operation of the electromagnets is determined by the frequency from the output of the divider 2 frequency. By changing its -division ratio, you can select the speed required for control. At the outputs of block 4 of power amplifiers. Powerful current pulses are generated, causing alternate operation of electromagnets of the sign of the synthesizing unit 5 being monitored. When the printing element strikes an element with a current-contact contact, sensor 6 produces a pulse arriving at the second input of the element 12. At its first input it enters a pulse with a duration equal to the tolerance interval of the operation of the electromagnet of the controlled icon-synthesizing unit 5 formed by the second waiting multivibrator 10 along the leading edge of the entrance constituent pulses at its input. Since the formation of pulses by the first waiting multivibrator 9 occurs also along the leading edge, the beginning of the formation of the tolerance interval and the pulse of the electromagnet occurs simultaneously.

When a pulse generated by sensor 6 hits the tolerance field (pulse time at the initial input of the element 12), the output of the element 12 comes in a signal applied to the first inputs of the elements 14 of the display unit 7. Permitting pulses from the output of switch 8, which allow the passage only on the bus corresponding to the number of the electromagnet being tested, arrive at the second inputs of the elements 14. Consequently, when pulses are simultaneously generated at the two inputs of any element AND 14 of the display unit 7, one of the triggers 15 is triggered, including one of the display elements 16 with the number of the tested electromagnet signosynthesis, respectively. of the knot 5. If the electromagnet does not operate, or the gap is out of tolerance, the display element 16 does not

turns on After testing all the electromagnets of the monitored mark-synthesizing node 5 at the additional output of the switch 8, a pulse arrives at the input of the trigger 3. At the output of the trigger 3, a high potential appears which, entering the reset input of the splitter 2 frequency, prohibits its operation and brings the device to its original state. On the display panel of unit 7, the light vehicle is the display elements 16 with the numbers of serviceable verifiable electromagnets of the sign-synthesizing unit 5.

If necessary, the verification cycle can be repeated. Before starting the pressing of the button 17, the triggers 15 are transferred to the zero state and, thus, the display unit 7 is prepared for the next test cycle.

If diagnostics of the nature of the malfunction is necessary (the electromagnet failed to operate or its response time did not fall into the temporary tolerance field), the switch 11 switches the output of the sensor 6 with the input of the display unit 7. Now the pulse to the input of the display unit 7 will pass only when the printing element of the current-volume contact touches and, consequently, the display element 16 of the unit 7 is turned on regardless of the penetration in the tolerance field. With this 35 switch, an additional output

In the test, turning on the display element 16 with the number of the electromagnet being tested (which did not work at the first check) diagnoses the discrepancy between the real time response and the specified tolerance.

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Claims (1)

Claims: Device for controlling parameters. a ditch of the symbol-synthesizing node of the printing mechanism, containing a series-connected master oscillator and a frequency divider, a trigger, a switch, a display unit, a pulse sensor, and a power amplifier unit, whose outputs are connected to the corresponding inputs of a controlled sign-synthesizing node of the printing mechanism, the output of which is connected to the pulse sensor input that differs in order to simplify the device by reducing the total number of elements while simultaneously expanding the functional elements By providing a diagnosis of the nature of the failure, the switch, the first and second standby multivibrators, and the I element are introduced, with the first output of the frequency divider connected to the signal input of the switch through the first waiting multivibrator. The first output through a second standby multivibrator connected in series, the element And the switch is connected to the control input of the display unit, the signal inputs of which are connected to the corresponding E unit inputs, power amplifiers and respective outputs 40 which through a trigger, the reset input of which is the start signal input, is connected to the reset input of the frequency divider, and the output of the pulse sensor is connected to the second inputs of the switch and element I. Q) UZ.2