SU1112343A1 - Multichannel device for control of step motors - Google Patents

Description

1 The invention relates to automatic control and can be used in systems working in conjunction with digital computers. A device for controlling a stepper motor is known comprising a position encoder, a reference element, a pulse generator and a switching unit connected to the stepper motor l1. The disadvantages of this device are the complexity and low speed in the case of collaboration with a digital computer. The closest to the invention is a multichannel device for controlling step motors, containing an input register, the first inputs of which are directly, and the second through a decoder are connected to the corresponding inputs of the switching blocks of the windings of the stepping motors, as well as a pulse generator, through a control unit connected to the inputs units of switching, and the pulse counter whose output is connected to the first input of the comparator unit, the second input connected to the third outputs of the input register 2. A disadvantage of the known device is low speed. This is due to the low operating frequencies of the stepper motors as compared to the frequency of information exchange with a digital computer, as a result of which until one of the channels finishes working out a specified movement the rest are in standby mode. The purpose of the invention is to increase the speed of the device. This goal is achieved in that a multichannel device for controlling stepper motors, containing a control code receiver, a comparison unit, a decoder, and in each channel, switching blocks, the outputs of which are connected to the corresponding stepping motors, and the information bits of the control code receiver are connected to the first inputs of the comparison unit, the address bits through the decoder - with the enabling inputs of the switching units, and the input - with the device input, the sync pulse generator and the converter are entered the goal code and each channel associated with the corresponding step motors, the outputs of which are connected to the second inputs of the comparison unit, the outputs connected to the corresponding signs of the switching units, the control inputs of which are connected to the output of the clock generator, the input connected to the output of the receiver The control inputs of the angle-code transducers are connected to the corresponding outputs of the decoder. The drawing shows a block diagram of the device. The block diagram contains a control code receiver 1, a comparison block 2, switching blocks 3, stepping motors 4, angle-code converters 5, a clock generator 6, a decoder 7, and an input 8 of the device. The device works as follows. On the communication line, control information for 111 channels is cyclically transmitted to the input of receiver 1 of the control code. In this case, in each cycle of transmitted information, there are code words, each of which has the address of the corresponding channel. When the current word is received by the receiver 1 of the code, the channel address is determined by the decoder 7 and the enable signal is supplied to the enabling inputs of blocks 3 and converter 5 of this channel. At the same time, the input of the comparison unit 2 is the code from the corresponding angle-code converter 5, which is compared with the external code received at the second input of the comparison unit 2 from the information output of the code receiver 1. At the end of the reception of the current word by the shaper 6 clock pulses, a command pulse is generated, which in this channel triggers the switching unit 3 and switching the windings of the stepping motor 4. The motor 4 performs one step in the direction corresponding to the output signals of the comparison unit 2. When the next word is received by the receiver of code 1, the address of the other channel is decoded, the received information is compared with the code of the corresponding angle-code converter of the given channel and the command generated by shaper 6

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the impulse causes one-step motion of the engine 4 of this channel.

Thus, in one cycle of information exchange, all the channels of the tracking system move one step. If the frequency of the exchange cycles (the frequency of information supply) is made equal to the maximum permissible switching frequency of the stepper windings

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engines, then in the pre-pledged multi-channel device, for a period of time allocated to the stepping device for performing one step, they are instructed to make their engines run in the P channels.

At the same time, such an increase in speed does not require the use of memory elements and an additional com mutation.

Claims (1)

MULTI-CHANNEL DEVICE FOR MANAGING STEP-BY-STEP ENGINES, containing a control code receiver, a comparison unit, a decoder and in each channel switching units, the outputs of which are connected to the corresponding stepper motors, and the information bits of the control code receiver are connected to the first inputs of the comparison unit, address bits through the decoder - with enabling inputs of the switching units, and the input with the input of the device, characterized in that; that, in order to increase the speed of the device, a clock driver and an angle-code converter in each channel are connected to it, connected to the corresponding stepper motors, the outputs of which are connected to the second inputs of the comparison unit, the outputs connected to the corresponding sign inputs of the switching units, the control inputs of which connected to the output of the clock generator, the input of the control code connected to the output of the receiver, ^ U-α 1112343, and the control inputs of the angle-code converters are connected to the corresponding outputs of the decoder 1 1 12343