RU1775198C - Digital device for control over re-adjustment of sheet-cutting machine - Google Patents

Abstract

Usage: polygraphs, sheet cutting rotary machines. The inventive speed controller 1, 9, engine 2, 8, cutter drum 3, fixed knife 4, measuring cylinder 6, pressure roller 7, speed adjuster 10, two pulse speed sensors of the drives of the cutting drum 11 and measuring cylinder 12, two counters 13, 14, three memory blocks 15,16,17, code division block 18, format 19 digital-code block, code adder-subtractor 20, two code-voltage converters 21, 22, controlled amplifier 23, frequency generator 24, frequency divider 25, recording and reset signal generating unit 26, period setting units are quantized 27, the gain 28, the frequency converter ta-voltage analog speed sensor 29. 30. 12-14-16-18-17-20-21-23. 17-22-29.19-18.26-15-20.26-13-15.11-29-23.11-13. 23-1-2, 30-1, 28-23, 27-25-26, 25-18, 24-25, 18-17, 19-18, 26-16, 25-14, 10-9-8. 2 C.p. fs, 4 ill. next to VJ VI next to 00

Description

The invention relates to printing, in particular to sheet cutting rotary machines.

The aim of the invention is to improve the accuracy of /; reliability of the machine, as well as economical paper tape.

The goal is achieved by the fact that a converter, a code voltage, a controlled amplifier, a reference unit, a gain factor, a frequency-voltage converter, a quantization period setting block and a tunable frequency divider are introduced into the device, the first input of which receives a signal from a stabilized frequency generator , the control input is connected to the unit for setting the quantization period, which is aggregated with the speed regulator of the measuring cylinder drive, the output of the frequency divider is connected to the input of the recording signal generation unit and resetting and simultaneously with the control input of the division unit, to the information input of which the signal is transmitted through the memory unit, and the counter-converter from the pulse speed sensor of the measuring cylinder drive, the output of the division unit is connected through the memory unit to the input of the code-voltage converter and with one of the inputs of the adder-subtracter, to the other input of which a signal is supplied through the second memory unit and the counter-converter from the pulsed speed sensor of the drive of the cutting drum, the output of the adder is connected to the receiver code-voltage, the signal from the output of which is fed to the input of the controlled amplifier, the second input of which receives the signal from the drive-voltage converter, the signal from the frequency-voltage converter, the input of which is connected to the output of the pulse sensor, is fed to the third input of the amplifier the speed of the cutting drum drive, a signal from the gain setting unit is received at the control input of the amplifier, which is also aggregated with the speed setter of the main drive, the output of the amplifier is connected to the input of the speed controller spines of the drive of the cutting drum. A signal from an analog sensor (tachogenerator) can be fed to the second input of the drum drive speed controller, in the case when a motor is used to drive a drum with an integrated tachogenerator. then the frequency-voltage converter must be excluded from the circuit.

In FIG. 1 shows a functional diagram of the device; Fig. 2 is a diagram of a recording and reset signal generation unit; in FIG. 3 is a block diagram of a code division; in FIG. 4 - diagram w, explaining the work

a unit for generating recording and reset signals.

The device comprises a speed controller 1 of a motor 2 of a drum drive 3 cuts,

working in conjunction with a fixed knife 4, cutting on the fly a paper tape 5, which is fed by a measuring cylinder 6 paired with a pressure roller 7, which are driven from the main engine 8 with its

0 speed controller 9 and speed controller 10, pulse sensor 11 of the drive speed of the cutting drum, pulse sensor 12 of the drive speed of the measuring cylinder, counting converters 13, 14, blocks 15,

5 16, 17 memory, block 18 code division, digital-code block 19 specifying the format, adder-subtractor 20 codes,

converters 21, 22 code voltage, controlled amplifier 23, generator 24

0 stabilized frequency, tunable frequency divider 25, recording and reset signal generating unit 26, quantization period reference unit 27, gain coefficient reference unit 28, frequency-voltage converter 29 (or analog speed sensor 30).

The device operates as follows.

The signal from the impulse speed sensor 12 of the drive 8 of the graduated cylinder 6 is fed to the counter-transducer 14, from the output of which the result is written in the form of a binary code to the memory unit 16 by a command from the signal generation unit 26

5 of the reset record, and the counter 14 immediately after the recording returns to the zero state also upon a command from block 26. The NI code recorded in the memory block 16 is fed to the input of the code division unit 18, where the binary NI code is divided by the number A, expressed also in binary code and specified by the digital code unit 19 of the job. Using the block 19, any necessary ratio of the speeds of the drives of the measuring cylinder 6 and the drum 3 of the cut is set, and accordingly the required sheet format. The result obtained at the output of division block 18 in binary code N3 Ni / A is input to the memory block 17 into which

0 and is recorded by a command from block 18. From the output of block 17, the Na code is fed to the input of code-converter 22 and to the first input of adder-subtractor 20, to the second input of which a signal from

5 of a pulse speed sensor of the drive 2 of the reel 3 of the cut through the counter-converter 13 and the memory unit 15, the operation of which is also controlled by the recording and reset signal generation unit 26, which synchronizes the operation of the counters 13, 14 and blocks 15,

16 memories in time. The result from the output of the adder 20 is fed to the input of the converter 21 code-voltage, the output signal of which is fed to the first input of the controlled amplifier 2, the second input of the amplifier receives a signal from the output of block 22, and the signal from the converter 29 is fed to the third input of the amplifier -voltage, the input of which is connected to the output of the speed sensor 11. The signal from the output of block 23 goes to the input of the speed controller 1 of the drive of the drum 3 cut.

To increase the accuracy of the cut and the reliability of the machine, a tunable frequency divider 25 is introduced into the device, which is controlled by the quantization period setting unit 27, which is aggregated with the speed setter 10 of the main drive 8 and whose output is connected to a stabilized frequency generator, and the signal from the output of the unit 25 is fed to the input of the recording and reset signal generating unit 26 and to the control input of the code division unit 18, which prepares the unit 18 for operation at the beginning of each quantization period and thereby increases the reliability of Device boots. In the prototype, the coordination of the device’s work is achieved by the coordination of the time operation of the generators in the clock generation unit and in the division unit.

In the inventive device, the information processing process is optimized, since the division begins immediately after the appearance of the signal at the output of block 16. The tunable divider 25 makes it possible to increase the quantization period with a decrease in the speed of the main drive 8 and to reduce the quantization period by two, four times with an increase in speed by 4 times, the speed controller 10. Simultaneously with the increase in speed, the gain of the amplifier 23 will be proportionally increased, which is controlled by the gain setting unit 28, also coordinated with the speed adjuster 10. When the speed of the main drive 8 decreases, for example, by a factor of 2, the number of pulses at the output of the speed sensors 12 decreases by a factor of 2, but since the quantization period increases by a factor of 2, the number of pulses remains unchanged and, accordingly, the codes at the output of the division unit 18. corresponding to the specified formats will not be changed. Since, when the speed of the main drive 8 is reduced by a factor of 2, we increase the number of pulses by a factor of 2, in order to obtain the actual speed of the drive 2 of the cutting drum 3, it is necessary to reduce the gain of the amplifier 23 by half, this is done using block 28.

Aggregated - this means that the axes of these devices are mechanically rigidly connected to each other. This bond may not necessarily be mechanical. In general, the term “aggregated” should be understood as a synchronous change in the values of blocks 27, 28 with a change in the value of block 10. Block 10 can be a potentiometer on the axis of which there can be wrench switches, blocks 27, 28 and their axes can be rigidly interconnected (blocks 27, 28 can be arranged on a single switch). Block 27 controls the logical keys of block 25. Block 28 commutates the feedback resistors of amplifier 23, thereby changing the gain.

When the potentiometer rotates (Zaddlechik 10), we send a certain signal to the input of the speed controller 9 of engine 8. At a speed n of the engine 8 from 0 to 400 rpm from the output of block 25, we obtain the signal of the lowest frequency, i.e., the maximum division coefficient while the gain is minimal. When a potentiometer moves to a certain point, which corresponds to a speed of 400 rpm in the above example, the signal frequency at the output of block 25 increases by a factor of 2 and the gain also increases by a factor of 2 thanks to blocks 27, 28. All this makes it possible to maintain high accuracy cutting and at low operating speeds of the machine.

In order to improve the operating mode of the drive 2 of the cutting drum 3, and accordingly, to increase the accuracy of the cutting, another code-voltage converter 22 is introduced into the device, at the output of which a signal is proportional to the code received from the output of the division unit 18 and is supplied to the second input of the amplifier 23. as well as a frequency-code converter 29, at the output of which a signal proportional to the speed of the drive 2 is generated and is supplied to the third input of the amplifier 23.

Taking into account that the period of quantization (repetition of calculations) is rather small Tc 1/256 s, 1/128 s, and, accordingly, the frequency of signal changes at the output of block 17, as well as at the output of converter 22, the code voltage is high, we can assume that the output of block 22, we have a continuous reference signal. At the output of block 29, which converts the repetition rate of pulses from the output of the speed sensor 11 into voltage, we also have a continuous signal. The signals from the outputs of blocks 22 and 29 are algebraically added to the input of the amplifier 23. The proportional component of the control law is calculated in block 23 by the deviation of the voltage Us from the voltage block 29 of the reference voltage Ua from the output of the block 22, B In the case when an engine with a built-in tachogenerator is used as drive 2, which, in Fig. 1, is surrounded by a dashed line and indicated by the number 20, the signal from its output can be used instead of the signal coming from block 29, which in this case f is eliminated from the circuit. And the voltage coming from the tachogenerator to the second input of the speed controller 1 of the engine 2 is subtracted from the voltage coming from the output of block 22 and multiplied by the amplifier 23. Continuous communication - part of the connected device provides fast elimination of disturbances, which significantly improves the dynamics a machine that has an impact load, and the discrete (digital) part - high precision cutting.

Block 24 is a stabilized frequency generator at the output of which in the proposed device, which is implemented in practice, we obtain a frequency f of 256 Hz. In order to reduce this frequency, which enters through the block 25 to the input of block 26 and serves as a block 25, which, on command from block 27, divides the frequency by a factor of K 2, 4, 8. Block 25 can be implemented on the basis of D-flip-flops with logical keys, or a counter with logical keys. If necessary, you can divide the frequency with other coefficients.

The recording and reset signal generating unit 26 is built on two triggers 1, 2, a delay line 3, and two differentiating elements (DE) 4, 5 (Fig. 2).

Block 26 operates as follows.

On the leading edge of the pulses of the signal from the block 25 to the input of the trigger 1, the last signal appears at the output of the signal, which arrives simultaneously at the differentiating element 4 and the delay line 3. The signal from the output of the DE 4 goes to the recording input of the memory blocks 15, 16 From the delay line 3, the signal is fed to the input of trigger 2, from the output of which, through DE 5, blocks 13.14 are reset. The timing diagram of block 26 is shown in Fig. 4 Tc — period of the cycle (quantization) —this is the period of arrival of the leading edge of rectangular pulses from the output of block 25. Te is the delay time of the reset signal of blocks 13, 14 with respect to the signal for writing information to blocks 15 , sixteen.

Block 18 works as follows (Fig. 3).

The NIC code of the output of the memory unit 16 is transmitted through the first input of the switching unit 1 to the bus A of the adder 2, to the bus B of which the signal A is supplied in an additional code (inverted) from the block 19 of the 0 format setting (division coefficient). The signal from the output of block 2 goes to the input of register 3, where the result is recorded by a command from generator 4, which is started by a command from block 25 and the same signal blocks 5 1 switches to the signal passing through the first channel 1. The resulting signal from the output of block 3 is received through block 1 to input A of the adder, where it is again compared with the signal from the format setting unit. 0 A new result from the output of block 2 is recorded in register 3 by the signal from the output of generator 4 and the same signal is sent to counter 5, which records the number of subtraction operations, and the result of division is 5. The switching unit 1 from the first channel 1 is switched to channel 11 by the leading edge of the first pulse, which will come from block 4, all subsequent pulses will only confirm switching 0. Generator 4 operates until a potential change occurs at the transfer of block 2, indicating the end of the division.

By the signal from the transfer of adder 2, the division result obtained at the output of counter 5 is recorded in block 17 and the operation of generator 4 is stopped. The operation of the generator is resumed when the next pulse arrives from block 25 and, at the same time, switching unit 1 switches from channel 2 to channel 1.

Claims (3)

SUMMARY OF THE INVENTION 1. A digital device for controlling the readjustment of a sheet cutting machine, comprising a cutter drive speed controller, a cut length setting unit, a pulse cutter drive speed sensor, a measure cylinder pulse speed sensor, a first code converter, for example voltage, counter-converters, memory unit, characterized in that, in order to increase accuracy and reliability in operation and improve the dynamics of the machine, it is equipped with a second 5 code-voltage converter controlled by an amplifier , The gain setting unit, the frequency converter - a voltage gain setting unit, setting unit and the periods quantization tunable a frequency divider, the first input of which is connected to the output of the stabilized frequency generator, and the control input is connected to the output of the quantization period reference unit articulated with a speed cylinder drive of the measuring cylinder, the output of the tunable frequency divider is connected to the input of the recording signal generation block and to the control input of the block dividing codes, the first information input of which is connected to the output of the pulse speed sensor of the measuring cylinder drive through the first counter-converter and the first memory block, the output the cut length setting lock is connected to the second information input of the code division block, the output of which is connected to the input of the third memory block, the output of which is combined with the input of the second code-voltage converter and with the first input of the adder-subtractor, the second input of which is connected to the output a pulse sensor of the speed of the drive of the cutting drum through the second counter-converter and the second memory block, the second inputs of the first and second blocks of the counter-converters, the first and second memory blocks are connected respectively to the first and second, third and fourth outputs of the recording and reset signal generating unit, the output of the adder-subtractor is connected to the input of the first code converter - the voltage, the output of which is connected to the first input of the controlled amplifier, the second input of which is connected to the output of the second code converter - voltage, the third input - with the output of the frequency converter - voltage, the input of which is connected to the output of the drum drive speed sensor The cut, the control input of the controlled amplifier, is connected to the output of the gain setting unit coupled to the measuring cylinder drive speed sensor, and the output of the controlled amplifier is connected to the input of the cut drum drive speed controller. 2. Device pop 1, characterized in that the recording and reset signal generating unit comprises two triggers, a delay line and two differentiating elements, the outputs of which are the outputs of the unit, the output of the first trigger is connected to the input of the first differentiating element and to the input the second differentiating element through the delay line and the second trigger., 3. The device according to paragraphs 1 and 2, with the proviso that the code division unit comprises a switching unit, an adder, a register, a pulse generator, a counter, the output of which is the information output of the unit, connected to the output of the pulse generator, with the inputs of the register and the switch, the first input of the pulse generator is connected to the control inputs of the switch and the block, the first information input of the block is connected to the input of the adder, the second input of which is connected to the output of the switch, the first information input of which is the second information input of the block; the second information input of the switch is connected to the output of the register, the information input of which is connected to the output of the adder, the control output of which is connected to the second input of the pulse generator and the control output of the unit. Fig 2 in fa.tf.fff ifttfc 1 {#s 5l a 14 Figz