Brief introduction Tube cutting machine is a special equipment used to press and cut all kinds of common cardboard, corrugated cardboard, plastic sheet and leather products. It is suitable for printing, packaging and decoration, plastic and other industries. It has the advantages of compact structure, excellent manufacturing, high pressure cutting force, high precision, easy to use, safe and reliable operation, etc. Process requirements Fully automatic mode, using the 3VE's flying shear function, input the length that needs to be cut, and require the error of each cut out tube to be within 5 silk. Program The control system mainly uses the V-Control HMI LEVI-700LK, PLC host using LX3VE-1412MT, servo using position control mode. The brief scheme is as follows: input the length to be cut on the touch screen, set the output, input the number of pulses for one turn of the master and slave axis respectively, and the perimeter of the master and slave axis, etc., click on the parameters to determine, then click on the start, and you can work. Project summary 1, for the sensor position judgment. 2, because the sensor is in front of the nozzle arm, so you need to determine whether it is in the front half or the back half, you need to go through the distance between the sensor and the nozzle arm before rising and falling. 3, the power-on self-test operation, each time the power on should first determine whether the sensor is working properly, the position is right to run.

Application of V-Control PLC and HMI on pipe cutting machine 1. Introduction Tube cutting machine is a special equipment used to press and cut all kinds of common cardboard, corrugated cardboard, plastic sheet and leather products. It is suitable for printing, packaging and decoration, plastic and other industries. It has the advantages of compact structure, excellent manufacturing, high pressure cutting force, high precision, easy to use, safe and reliable operation, etc. 2. Process requirements Fully automatic mode, using the 3VE's flying shear function, input the length that needs to be cut, and require the error of each cut out tube to be within 5 silk. 3.Solution The control system mainly adopts V-Control HMI LEVI-700LK, PLC host using LX3VE-1412MT, servo using position control mode. The brief scheme is as follows: input the length to be cut on the touch screen, set the output, input the number of pulses for one turn of the master and slave axis respectively, and the perimeter of the master and slave axis, etc., click on the parameters to determine, then click on the start, and you can work.

Programmable controller due to its application in industrial control is becoming more and more obvious, it has many advantages such as simple compilation, powerful, reliable, simple maintenance, and in many places has gradually replaced the logic control of the relay circuit. At the same time, intelligent central air conditioning is also being widely used, in the case of combining both of them, not only to promote the development of science and technology, but also to improve people's living standards. Key words: PLC control system, intelligent programming, controller 1 Overview 1.1 Introduction With the continuous development of China's economy, a high degree of social information, new high-tech technologies continue to be applied to all aspects, making intelligent has become an inevitable trend of development. Intelligence also often starts from the equipment automation system. This paper is based on personal work experience on a water-cooled screw unit to explain the relationship between PLC control design and intelligent central air conditioning system. 1.2 PLC principle and application of central air conditioning refrigeration system control there are three types of control: the early relay control system, direct digital controller DDC, and PLC (programmable controller) control system. Relay control system has been gradually eliminated due to high failure rate, complex system, power consumption and other obvious shortcomings, although the direct digital controller DDC has been a great development in intelligence. But because of the DDC its own anti-interference ability and the limitations of the hierarchical step-by-step structure and limit the scope of its application. On the contrary, PLC control system with its reliable operation, use and maintenance are very convenient, strong anti-interference ability, suitable for the new high-speed network structure of these significant advantages so that it has gradually been widely used. Programmable controller is a member of the computer family. After it was invented in the middle and end of the last century, it has been widely used in the electrical control of machine tools, conveyor machines of various lines, power generation, chemical industry, electronics and other industries. The early programmable controller is called Programmable Logic Controller (PLC), which is abbreviated as PLC. PLC has many advantages such as powerful, reliable and easy to maintain. PLC has many advantages such as powerful, reliable, and easy to maintain. For the traditional relay circuit, it is difficult to achieve complex logic functions and digital control, and to achieve a certain scale of logic control function is not only cumbersome to design, difficult to achieve upgrades, and prone to failure, complex maintenance, has now been abandoned by the control system of medium and large equipment. And PLC is being widely used and has gradually replaced the logic control of the relay circuit. With the continuous developmen...