The application of PLC in the control system in ring spinning

Application of PLC in the control system of the spinning frame newmaker welcome to visit exhibition hall 1 e spinning machinery exhibition hall carding machine, warping machine, opener, MAO linen textile machinery. 。 。 Or striped spun spinning frame is the roving with a certain count yarn textile machinery. Its control system performance is stable or not will directly affect the production cost. Spinning machine with PLC controller control, simple operation, less wiring, yarn quality is good, and convenient maintenance and management. Spinning frame is running at low speed, high speed operation, wind suction, doffing process, etc. Doffing divided into automatic doffing and doffing ( Suspension of work) , automatic doffing points fixed-length doffing and doffing regularly. Automatic doffing way, doffing time and length can be set up, and can keep when power supply drop. Control system, there are eight actuators, about the input element, the thermal relay FT1, F12, FT3 and limit switch S for safety protection devices, can be in series as an input. Use Siemens PLC S7-200 CPU224 model can satisfy the control requirement. 1 PLC wiring and process requirement of PLC external connection as shown in figure 1. After turning on the power supply, wind power motivation begin to work. Forward at the same time, the ring rail lifting motor, ring rail. When to start spinning ring bar position, its movements, reset switch motor to stop. Press the starting button at low speed, the host began to run at low speed, yarn joint. Press the start button, into a high speed, the whole machine has entered into the phase of normal spinning. Spinning is full after tube, ring rail reset switch action, full tube signal lights. Into the work place, the host to stop switch, at this point, the host high-speed contactor release, ring rail lifting intermediate relay suck, host power maintain inertia turning. After that, the ring rail lifting motor reversal ring plate began to decline, down to the limit position, ring rail down limit switch action, stop falling. Hold claw electromagnet suction timeliness, open the support claws, and main shaft brake electromagnet suction spindle brake brake. After a period of delay after, to cut off the control power, doffing. Need midway stop midway stop button, the host can stop, and the brake itself. Need to advance doffing, press the doffing button halfway. When the machine accident, choose to press the emergency stop button and can make the whole machine immediately stops. Set in the program of interlocking protection between each process, equipment, make the production process more safe and reasonable. 2 programming control of PLC controller ladder diagram is shown in figure 2. When power on internal relay with PLC SMO. 1 and reset instruction, program reset before operation. Simulated potentiometer SMB28 and PLC internal math functions, design a 0 ~ 180 s time relay T37. Ladder diagram is used in the variable memory Vo. 1半。 2 and where V0. 5. Because of the ring rail motor to achieve positive &negative during work, so not only to realize interlock in the program, and to realize electric interlock in the electrical connection. Overflowing with yarn, yarn has been bright lights, When there is a low speed contactor contact occurs when the hot melt adhesive, flashing lights to 1 s cycle.
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