SU1401583A1 - Pulse shaper for stepping motor control - Google Patents

Abstract

The invention can be used in automatic control systems, for example, cage engines. The purpose of the invention is to simplify the device and increase the reliability of its operation - it is achieved by generating the output sequence and pulses inside the device itself without being bound to the external sequence. For this, a second trigger, two decoders, a switch, a comparison block and a register are additionally introduced into the device. The drawing shows the elements AND 1, 2 and 3, the element OR 4, the counters 5 and 6, the first 7 and the second 8 flip-flops, the register 9, the decryptors 10 P, the comparison unit 12, the switch 13, the memory 14, the digital-to-analog converter 15, the generator 16 pulses, the control transistor 17 and the bus; synchronization 18, Task 19, Start 20, Reset 21, output 22. Time diagrams explaining the operation of the device are given in the description of the invention. 2 Il. €

Description

four

ABOUT

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with

Nor does the logical " Prohibit the output of the pulse shaping control device of the stepper motor through the third element 3 of the frequency from the generator 16 pulses; the first trigger 7 is in the state of the second output and in the state of the first output. The logical "1" state signal gives permission to pass a sequence of pulses from the sync input bus 18 through

timing diagrams that show how the device works.

A pulse motor control device for a stepper motor contains the first 1, second 2 and third 3 AND elements, the OR 4 element, the first 5 and second 6 counters, the first 7 and second 8 triggers, register 9, the first 10 and second 11

15

The invention relates to a pulse technique and can be used in automatic control systems, for example, stepper motors.

The aim of the invention is to simplify the device and increase the reliability of its operation by generating an output sequence of pulses inside the device itself without binding to an external input sequence.

FIG. 1 shows the structural element 10, the first element AND 1, on the summing circuit of the pulse shaping device, the input of the second counter 6, which finds control of the stepper motor; in fig. 2 s in the state “O, and through the switch

13, the ROM is not polled, and consequently, a constant voltage is removed from the DAC 15, which is applied to the base transition of the control transistor 17 connected to the feedback circuit of the generator 16. Using the linear portion of the current-voltage characteristic of the transistor, it is possible to vary linearly frequency generator 16.

dendifraters, comparison unit 12, com.mu- 20 signal Ikus from input bus 20 tator 13, ROM 14, DAC 15, generator 16 into the first counter 5 and register 9 of the pulses, the control transistor 17, the value “Task groups of synchronization bus 18, “JINY 19” Task, 19 buses, defining the path that bus 20 “Start, bus 21“ Reset, you need to drive the drive, expressed bus 22, in the number of cycles generated

In the pulse shaping device 25, in the course of developing this control of the stepping motor, the second drives are in feedback. The second trigger 8 establishes the inputs of the first 1 and second 2 elements to the state "1 and enables the pass-AND connected to the first input of the first frequency from the generator of 16 pulses, counter 5 and synchronization bus 18, thereby driving the operation of the stepper pulse-shaping device engine. By means of a lazy stepper motor, the stepping motor, the outputs - to the inlet-drive, starts the task. From the offsets of the second counter 6, and the first inputs to the feedback task generate clock cycles proportional to the elementary values of the path that go through the bus 18 to the synchronization input of the device, thereby passing through the first element I 1, accumulate in the second the counter 6. The values of the output bits of the second counter 6, having passed the switch 13, interrogate the corresponding cells of the ROM 14, the output values

connected to bus 20 "Start, to input 40 that was converted into a DAC 15, register 9 and to the first input of the second one is blunt to the control transistor 17, which has a trigger 8, the output of which is connected to the second one in turn the input of the third element And 3, the sequence from the generator 16. The output associated with the output thickness 22, recorded in the ROM 14, the distribution of the device information, and the first input so as to take into account the dynamic through the generator 16 pulses, - miku work shchagovogo engine with letting transit page 17, DAC 15 - with ROM 14, ke and stop.

With the accumulation in the second counter of the 6th number, the value defining the maximum frequency on the bus 22 "Information, and consequently, the speed of the stepper motor (with optimal parameters) is removed by the first decoder 10 by means of the first decoder 10; in such a way that the last cell of the ROM 14 25 is constantly polled (point A, Fig. 2).

With the accumulation of the value in the second counter 6, equal to half the value of register 9, the unit 12 compares the output of the first trigger I, the first input of which is connected to the output of the comparison unit 12, and the second to the third input of the second counter 6, the second input of the second trigger 8 and with the output of the element OR 4, the first input of which is connected to the bus 21 "Reset, and the second through the second decoder 11-with the group of outputs of the first counter 5, the second input of which

a group of inputs connected to the switch 13, whose input through the first decoder 10 is associated with a group of 1 inputs of the second counter 6, with a group of inputs of the switch 13 and the first group of inputs of the comparison unit 12, the second group of inputs of which is associated with the group of outputs of the register 9, group of inputs which is connected to a group of inputs of the first counter 5 and a group of inputs "Setting the bus 19 device.

The device works as follows.

In the initial state, the second trigger 8 is in the state "O. The logical "O" state signal prohibits the output of the stepper motor control pulse generator through the third element 3 of the generator from 16 pulses, the first trigger 7 is in the state of the second output and in the state of the first output. The logical "1" state signal gives permission to pass a sequence of pulses from the sync input bus 18 through

The signal is set by which the first trigger 7 is set, thereby commuting the passage of the synchronization signals from the device bus 18 to the subtracting input of the second counter 6, the value of which decreases. When the switch 13 is blocked by the first decoder 10 (point B, Fig. 2), the second counter of the 6 cells of the ROM 14 is interrogated in the reverse order, thereby decreasing the output frequency of the Device Information. From the beginning of the occurrence of pulses on the synchronization bus 18, the first counter 5 subtracts these values to zeroing recorded on the second decoder 11, the signal from which, having passed through the OR 4 element, will reset the second trigger 8, thereby prohibiting the passage of frequency from the generator 16 through the third element Both 3 and the bus 22, the Device Information, sets the first trigger 7 to its initial state, as well as the second counter 6 (point C, Fig. 2).

With the development of the task by a stepper motor, the time of which is less (point A, fig. 2), at which the stepping motor goes to the optimum mode, the switch does not lock. The rest of the device is similar to that described.

FIG. 2 shows a temporary diagram of the operation of the device and its components: a - setting the task on bus 19; b - Start signal (bus 20), setting trigger 8, recording the task in counter 5 and register 9; in - the output of the trigger 8; g - device output (bus 22); d - synchronization signals (bus 18); e - switching cells ROM 14; W - output DAC 15; 3 - passing the values of the counter 6 through the switch 13; and - the output of the decoder 10; k is the output of comparison unit 12; l - output element And 1;

0

m - the output element And 2; and the output of the decoder 1 1.

Claims (1)

The invention The device for forming a control pulse of a stepper motor, contains its trigger, the outputs associated with the first inputs of the second element And the first element And, the second input of which is connected to the device synchronization bus, and the second input of the trigger via e. the device is OR connected to the device reset bus, two pulse counters connected in series ROM, DAC, control transistor, pulse generator and the third AND element, characterized in that 5 simplify the device and improve the reliability of its operation, a second trigger, two decoders, a switch, a comparison unit and a register are entered into it, with the switch being connected to a group of ROM inputs, its control inputs 0 are connected to the outputs of the decoder, and the information inputs of the switch and the decoder are connected to the outputs of the second counter and the first group of inputs of the comparison unit, the output connected to the supreme input of the first trigger, and the second group of inputs to the first the group of inputs of the first pulse counter, the first input connected to the second inputs of the first and second elements AND, the outputs 0 connected to the inputs of the second pulse counter, and the group of outputs of the first counter through the second decryptor with the second input of the OR element, and the second input - with the bus “Start of the device, register input and the first input of the second 5 flip-flops, the second input of which is connected to the output of the OR element, to the third input of the second pulse counter, and the output through the third element AND to the information output of the device. C L Y Acho A-f-. “L X five; Yy 3 ABOUT; g .§ it Q about o 3 egfF Kj X X AI-J / / - (- 1 / / i-j / -j / ЧJ X ch TCJ Sc | se / r X X