SU1200248A1 - Programmed control device for step motor - Google Patents

Abstract

A DEVICE FOR SOFTWARE CONTROL of a STEP ENGINE, containing a program setting block, a stepping motor, a clock generator, the output of which is connected to the first input of a deducting counter, a first output connected to the first input of the And element, the second input of which is connected to the output of the pulse generator and to the first input of the synchro pulse generator and the first input of the synchro pulse generator. and the output is to the second input of the subtracting counter and to the first input of the switch, which is so that, in order to increase the reliability of the device in pa-. the OR, elements connected in series, a memory block, the first NAND element, an arithmetic unit and a strobe pulse former, as well as a series of current sensor blocks, a summing counter and a second NAND element, whose output is connected to the second input of the arithmetic block, the second output connected to, the input of the program setting block, the first outputs of the program setting block and the arithmetic block through the first IZH element connected to the first input of the memory block, the second output of the set block programs and the third output of the arithmetic unit through the second element OR to the second input of the memory unit, and the third output of the program setting block and the output of the strobe-SL generator of the pulse through the third OR element to the third input of the memory unit, the second output of which is connected to the second input switch, the output of which is connected to the input of the stepper motor through the current sensor unit, the first output of the memory unit is connected to the third input of the deducting counter, the second output of which is connected to the second inputs of the NAND elements and the output is its element OR is connected to the second 4 input of the sync pulse generator, whose 00 input is connected to the second input of the summing counter.

Description

 . I

The invention relates to automatics and computing devices and is intended for use in control systems based on digital computers.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a functional diagram of the device for software control of a stepper motor,

The device contains a program setting block 1, elements OR 2-4, memory block 5, clock generator 6, pulse generator 7, subtracting counter 8, AND 9 element, switch 10, current sensor block 11, stepper motor (VD) 12, a summing counter 13, an arithmetic unit 1.4, a pulse generator 15, and NANDA 16 and 17.

The device works as follows.

At the first moment of time, the device is reset to zero, and from the first output of the arithmetic unit 14, the code goes to the information input of the memory block 5, From the second output of the program setting block 1, the code that determines the direction of rotation of the ShTs.12 goes through the OR 3 element to the second input of the block 5 memories. Upon the arrival of the strobe pulse from the third output of block 1, | programs through the element OR. 4, a code is written to the memory block 5 at the third input of the memory block 5. The same. A strobruktion pulse arrives at the 6th sync pulse shaper and allows the sync pulse to be distributed from a sequence of pulses produced by the generator, 7 pulses. The sync pulse overwrites the code from memory block 5 into subtractive counter 8 and zeroes counter 13, At the first output of counter 8, a high potential is formed, which opens And 9, At the second exit of the subtractive counter 8, a low potential is formed, which closes AND-NOT elements 16 and 17. Through the open element And 9 to the counting input of the subtracting counter 8 and to the first input of the switch 10 receives a packet of pulses from the generator 7 pulses. In the switch 10, the pulse packet is converted into an n-canon pulse train, and the pulses are also amplified in power. From the switch output p-ka00248 2

 - the sequence of pulses through the current sensors block 11 goes to the n-phase SM 12, the second output of the memory block 5 to the second input of the switch 10 receives a logical signal, depending on the level of which in the switch 10 is generated, or right, or a reverse pulse sequence that determines the direction of rotation,

10 Step 12.

At the output of block 11 of current sensors, a single-channel sequence of pulses is formed, each pulse of which is formed only in

15 if the current passes through any winding of the SM 12. This sequence of pulses, the number of which corresponds to the number of steps worked by the SM 11, goes to the counting

20 input summing counter 13, where they are summed up. .

After reading the number written in subtractive counter 8, its first output is set to low.

25 potential, the closing element And 9 and prohibiting the passage of impulses from the generator 7 pulses. At the second output of the counter 8, a high potential is established, opening

30 elements AND NOT. 16 and 17, allowing the operation of the arithmetic c block.

The number, recorded in summing counter 13, arrives at the first input of the arithmetic unit 14. At 5, the second input of the arithmetic unit 14 receives the number recorded in memory block 5. In the arithmetic unit-14 occurs; bitwise comparison of two numbers. If the numbers are equal, on the first

The output of the arithmetic unit 40 generates a signal that is fed to the input of the unit 1 of the program task. This .. signal permits the unit 1-set the program to issue the following command.

45

If the numbers are not. However, no permission is given for the installation of a new team to block 1. The task of the program is not issued. In this case, at the second output of the arithmetic unit 14, a difference between 50 two numbers is formed, which through the element OR 2 enters the information input of the unit 5 and the input of the gate generator 15. From the third output of the arithmetic unit 14, a difference signal is output, which through the element OR 3 is fed to the second input-block 5 of the memory. The strobe pulse shaper 15 generates a pulse that triggers the circuit in a manner similar to a gating pulse coming from block 1 of the program's task.

Thus, the device will work out the first command, coming from block 1 of the program's task, until the arithmetic unit

14 do not provide permission for dtsachu. new team. .

The invention makes it possible to increase the reliability of the device by introducing control of the passage of control pulses through the windings of the SM.

Claims (1)

DEVICE FOR PROGRAM CONTROL OF A STEP ENGINE, containing a program setting unit, a stepper motor, a sync pulse shaper, the output of which is connected to the first input of the subtracting counter, the first output connected to the first input of the And element, the second input of which is connected to the output of the pulse generator and to the first 'input of the shaper clock, and the output is to the second input of the subtracting counter and to the first input of the switch, which consists in the fact that, in order to increase the reliability of the device in operation, ele OR copies, a memory block connected in series, a first AND-NOT element, an arithmetic block and a strobe generator, as well as a series of current sensor blocks, a totalizing counter and a second AND-NOT element, the output of which is connected to the second input of the arithmetic block, the second output connected to . the input of the program unit, and the first outputs of the program unit · and the arithmetic unit through the first OR element are connected to the first input of the memory unit, the second output of the program unit and the third output of the arithmetic unit through the second OR element to the second input of the memory unit, and the third the output of the program task block q and the output of the strobe-® pulse generator through the third OR element to the third input of the memory block, the second output of which is connected to the second input of the switch, the output of which is connected through the current sensor block is connected to the input of the stepper motor, the first output of the memory block is connected to the third input of the subtracting counter, the second output of which is connected to the second inputs of the NAND elements, and the output of the third OR element is connected to the second input of the clock generator, the output of which is connected to the second input of the summing counter.