SU1671748A1 - Autostop for warp knitting machines - Google Patents

Abstract

The invention relates to automatic devices for controlling the quality of textile materials and controlling technological equipment, in particular, the basics of hall knitting machines. The aim of the invention is to increase reliability by eliminating false stops and reducing time simply. The signals from the photoelectric sensors of the presence of defects, making reciprocating movement, through the signal processing unit and the OR element are transmitted to the control circuit and the starting drive circuit of the main machine, which stops when the defect signal passes. In order to avoid false stops of the machine, in the event of the passage of interference signals, the drive for moving the sensors for the presence of defects continues to work until one of the two counters is filled with the appropriate set number of pulses repeated upon repeated repeated reading of the defect or the number of pulses from the clock generator. pulses, which leads to either disconnection in the presence of a drive defect, movement of sensors in the presence of defects, or switching on the drive of a machine when a false defect signal is detected. 1 il.

Description

The invention relates to the field of automatic devices for controlling the quality of textile materials and controlling technological equipment, in particular, the basics of knitting production machines, and can be used in other industries with identical technological processes.

The aim of the invention is to increase reliability by eliminating false stops and reducing downtime.

The drawing shows a block diagram of the device.

The device contains one or several photoelectric sensors 1 strips of defects in the web, signal processing units 2, element OR 3, converter 4, control circuits 5-7, each of which has a series-connected amplifying cascade 8 and relay 9, starting drive 10 machines, generator 11 clock pulses, elements 12-14, trigger 15, summing counters 16 and 17, element 18 and the starting circuit 19 of the actuator moving sensors 1 for the presence of defects.

Sensors 1 for the presence of defects are kinematically connected with their drive aozvratno-po

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stepping movement (not shown), and their outputs through the corresponding signal processing unit 2 are connected to the corresponding inputs of the OR element 3, the output of which is connected to the first input of the starting circuit 10 of the base machine through the serially connected converter 4 and control circuit 5. The counting input of the counter 16 and S-input of the trigger 15 are connected and connected to the output of the converter 4. The direct and inverse outputs of the trigger 15 are connected to the first inputs of elements 12 and 13, respectively, the second inputs of which are connected to the generator output 11 clock pulses and the outputs are connected respectively to the counting and R-input of the counter 17. The output of the counter 16 through the control circuit 7 is connected with the starting circuit 19 of the actuator displacement sensors 1 defects and through the element NOT 18 is connected to the first input element And 14, the second input of which is connected with the R inputs of the trigger 15 and the counter 16 and the output of the counter 17, and the output of the element I 14 is connected via a control circuit to the second input of the starting circuit 10 of the drive of the basis of the drilling machine.

The clock pulse generator 11 may be sensors for the end position of the drive for reciprocating movement of sensors 1 for the presence of defects.

The device works as follows.

In the process of its reciprocating movement at the outputs of the sensors

The defects are formed by signals that, after appropriate processing in the signal processing units 2, are passed through the element OR 3 to the input of the converter 4. Simultaneously from the generator output

The II-pulse pulses remove single pulses at the moment of changing the direction of movement of the sensors 1 for the presence of defects, passing through the element 13, at the first input of which in the initial state there is a signal of the level of the logical unit, and reset the counters 16 and 17 and the trigger 15.

When a defective area appears on the monitored canvas, a single pulse is removed from the output of the converter 4, which is fed to the input of the control circuit 5, which triggers the relay 9 and the starting circuit 10, as a result of which the dummy machine stops. At the same time, the same unit impulse changes the state of the trigger 15 and a logic unit level signal appears at the input of the AND 12 element, and a logic level signal at the input of the AND 13 element appears

zero In this case, the sensors 1 of the presence of the defect continue to make a reciprocating movement, each time crossed the fixed defect area, in

as a result, the pulses from the output of the converter 4 are counted by the counter 16. The pulses coming from the generator output 11 clock pulses pass through the element 12, since at its first

the input has a logic unit level signal, and is counted by counter 17,

When the counters 16 and 17 are filled with a predetermined number of pulses NI and Na (Ni N2), a level signal is generated at their outputs.

logical unit. If the defect does exist, upon reaching the counting of the number of NI pulses at the output of counter 16, a logic unit level signal appears, which causes the relay 9 to trip.

in the control circuit 7, the start-up circuit 19 of the drive of the reciprocating movement of the sensors 1 for the presence of defects is turned off. Otherwise (in the event of a breakdown of the basics of the

for any false reasons) counter 17 counted N2 pulses, as a result of which, at its output, the logic unit level signal was reset to zero on the R input of counter 16 and trigger 15, and through element 14 to the input of control circuit 6 drive circuit 10 of the basing machine, which continues its work.

Claims (1)

Invention Formula A device for automatically stopping the bases of the dummy machine, containing photoelectric sensors for the presence of defects, kinematically associated with the drive of their reciprocating movement, an OR element, each of the inputs of which is connected to the output of the corresponding sensor for the presence of defects through the signal processing unit, and the output through The first control circuit is connected to the first input of the starting drive circuit of the main machine, as well as a clock pulse generator, counters and a second control circuit, the output of which is connected to the input of the starting drive circuit of the sensor for movement of sensors for defects, different from reliability by eliminating false stops and reducing downtime, it is equipped with a trigger, AND elements, an NOT element and an additional control circuit, the counting input of the first counter and the S input of the trigger are combined and connected to the output of the OR element; direct and inverse outputs of the trigger are connected to the first inputs respectively, the first and second elements And, the second inputs of which are connected to the output of the clock generator, and the outputs are connected respectively to the counting and R-inputs of the second counter, the output of the first counter is connected to the input of the second control circuit and through the element NOT to the first the input of the third element And, the second input of which is combined with the R inputs of the trigger and the first counter and connected to the output of the second counter, and the output of the third element AND is connected via an additional control circuit with the second input of the starting drive circuit of the basis of the inguing machine.