New electric control technology in the hottest pri

New electrical control technology in printing

at present, new electrical control technology has been widely used in domestic sheet fed lithography presses, such as PLC, touch screen, frequency converter, etc. Compared with the old type of equipment a few years ago, these new sheet fed lithographic printing machines have the advantages of high reliability, energy saving and high efficiency, and perfect functions. However, in many printing enterprises at present, the old type of sheet fed lithographic printing machines still have a considerable number. If they are transformed and PLC and touch screen are all used, a large number of lines need to be changed, which is almost equivalent to remaking the electrical control system. If only the main drive part of the sheet fed lithography press is transformed with frequency converter, the line change is small and the workload is small. It not only retains the simple and practical characteristics of the original relay contact control, but also gives full play to the advantages of the frequency converter in reliability and energy saving, and the cost performance of the transformation is high. The following is about the application of frequency converter in the transformation of domestic single and double color sheet fed lithography press

process characteristics of operation control of lithographic printing machine

in order to make the inverter driven variable-frequency motor can be well applied to the printing machine and meet the requirements of production process, we must first understand the process characteristics of printing machine operation control, what requirements it can put forward for the main function of the inverter to detect its tensile strength, and then choose which type of inverter, As well as the solution: the powertest3.0 software must back up the E, B, l, l, B files under the software installation path and the database files under the name of the data folder. How to specifically transform and connect the original line

the operation of the sheet fed lithographic press is driven by the motor through belt drive, gear drive and chain drive. The action of each drum, tooth row and mechanism is coordinated by mechanical connection, so the motor that controls the main drive controls the operation state of the whole machine. In terms of mechanical adjustment, inspection, installation and disassembly of PS version and blanket, 3. Electronic tensile testing machine is divided into manual fixture, hydraulic fixture and pneumatic fixture from the clamping mode of experimental fixture; When cleaning the machine, it is necessary to control the forward and reverse operation of the machine by manual counting. The speed of about 4r/min is appropriate. During the printing pause, in order to ensure that the PS version is not damaged and the ink is not dry, the machine should be operated at the same speed for a long time. When the machine starts formal printing production, it has an initial speed of about 3000 rpm. When the paper feeder starts to feed paper, it can accelerate to make the machine produce at a higher speed, generally 6000 ~ 8000 rpm. In order to adapt to different production speed requirements, the high speed can be adjusted through a speed regulating potentiometer, and the actual value of the speed can be indicated by the speedometer. There are two situations when the printing speed drops from the high speed of printing to the initial printing speed. One is to slow down the manual button, the other is to detect paper faults in the printing process, such as skew sheet, no paper, double sheet, etc., which makes the printing machine automatically slow down, and all parts make coordinated actions accordingly, such as pressure off, water off, ink off, paper feeding stop, etc. At the end of production, press the stop button, and the machine will stop smoothly in a free stop mode accordingly. In addition, in order to ensure personal safety, safety protection switches or emergency stop buttons are installed in the dangerous parts of the printing machine. As long as these switches act, the machine must stop immediately and the whole machine must be braked urgently no matter what state it is in

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