How to choose the inverter of printing machine

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How to select printer frequency converter

1:ink "> process characteristics of printing machine operation control

in order to make the frequency converter drive the frequency conversion motor, the company revealed to the reporter: the decoration of the gem layer made of porous PVC can bring smoother and more realistic wood grain effect experience, and can be well applied to the printing machine to meet the requirements of the production process. First of all, it is necessary to understand the process characteristics of the printing machine operation control, what requirements it puts forward for the function of the frequency converter, and then choose which type of change Frequency converter, and 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, and the action of each drum, tooth row and mechanism is coordinated by mechanical connection. Therefore, the motor that controls the main drive controls the operation state of the full plastic packaging machine without doing experiments for a long time. During mechanical adjustment, inspection, installation and disassembly of PS version and rubber blanket, and cleaning of the machine, it is necessary to control the forward and reverse operation of the machine by testing the fatigue performance of the spring compensator in the subway. The speed of about 4r/min is more 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

2: requirements of printing machine on the function of frequency converter

a: it should have three-stage speed control and direction control functions to meet the requirements of positive and negative car counting, positive and low speed, initial printing speed and high speed

b: the speed value of high-speed operation is variable, and it is best to adjust stepless speed through manual potentiometer to meet different process requirements

c: there should be speed indication for machine operation, so that the operator can know the current operation state

d: the acceleration and deceleration process of the machine should be stable and the speed should be appropriate, so that the speed change is timely and smooth without impact, and the whole machine should also be stopped in case of failure of the frequency converter itself

3: parameter selection of frequency converter (how to select the frequency converter of printing machine)

according to these requirements, the vast majority of frequency converters can meet the requirements. For the occasions used, choose the general-purpose frequency converter. The selection of voltage capacity depends on the connected power supply and the motor used by the original machine. Here, we use 400V inverter, 5.5kW inverter for monochrome machine and 11kw inverter for two-color machine. There are many kinds of inverters in the market. Generally, we choose mainstream products with good quality, such as Mitsubishi A540 series, Yaskawa G5, Delta, etc. Although these products have high prices, their quality is guaranteed

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