From the successful development of the multi-color machine remote control device and quality control system in 1972 by the German Roland Company, the automatic control system of the printing press has developed rapidly. Almost all manufacturers in the world have launched their own automated control systems, which has become a trend. No doubt the leader in this trend is Heidelberg. This article will introduce some of Heidelberg's CPC control system, CP-tronic system, CP2000 system.
CPC control system
Heidelberg's computer printing control system, or CPC (ComputerPrintingControl) system, is a scalable system used by Heidelberg applied to lithographic printing presses to pre-adjust the amount of ink, remotely feed ink, remotely register and monitor print quality. The system has ink volume and registration control device CPC1, printing quality control device CPC2, printing plate image reading device CPC3, registration control device CPC4, data management system CPC5.
1.CPCl printing control device
The Heidelberg CPCL printing control device is composed of a remote ink feeding device and a remote register device. It has three different models, representing three different expansion levels.
(1) CPC1-O1 This is the basic ink supply and register remote control device. The device controls the ink fountain motor through the buttons on the console to adjust the amount of ink, and controls the registration motor to realize the registration of multi-color printing.
â‘ Ink volume control The Heidelberg printing press divides the ink rollers into 32 areas in the axial direction (off printing machine, 20 in four-start printing machine), each ink zone has a width of 32.5mm. When adjusting the volume, it can be achieved by adjusting the ink volume of a single ink area. On the control panel of CPCl-O1, there are 32 groups of adjustment buttons 7 for controlling the micromotor, which correspond to 32 ink zones respectively. Each group has two buttons, the upper button is the ink adding button, and the lower button is the ink reducing button. Above the button is the ink level display. Like the adjustment button, there are also 32 groups, corresponding to 32 ink areas, and each group of displays is composed of 16 light-emitting diodes. It is used to display the thickness of the ink film in this area and the adjustment range. Within 0-0.52mm, each cell represents 0.01mm.
The adjustment of the ink output of the entire ink fountain can be achieved by changing the intermittent rotation angle of the ink fountain roller through the button 3 on the console. The adjustment of the rotation angle of the ink fountain roller is also controlled by the micro motor. The size of the rotation angle can be displayed on the display above the button. The value displayed at this time is the percentage of the actual rotation angle and the maximum rotation angle. For example, the display shows "45" indicating the ink fountain The actual rotation angle of the roller is 45% of the maximum rotation angle, and the adjustment accuracy is 1% of the maximum rotation angle.
â‘¡ There are two sets of buttons on the control console of the register to control the axial and circumferential registration of the plate cylinder. The control process is realized by a micro motor installed at the shaft end of the plate cylinder. Similarly, the value of the control adjustment can be displayed above the respective buttons, the adjustment accuracy is 0.01mm, and the adjustment range is K2mm.
Use a magnifying glass to observe the cross registration line of the printed sample on the console to determine the registration error of each color. Then select the corresponding unit through the unit selection button and adjust it through the register control button.
(2) CPC1-02 In addition to all the functions of CPC1-O1, CPC1-02 also adds a cassette tape device, light pen, ink film thickness distribution memory, and processor. Use a light pen to swipe on the ink volume display, you can record and store the current ink film thickness distribution in the form of data, and just use it when you need it.
The cassette tape device of CPCl-02 can call the preset data provided by the CPC3 printing plate reading device, so the amount of ink supply can be quickly adjusted to the set value, thereby shortening the preparation time and improving the production efficiency.
(3) CPCL-03 This is another expanded form of CPC1 device. It provides manual control, follow-up control and automatic follow-up control and other control methods. It can be connected to CPC2 printing quality control device through the data line. The CPC2 device measures the thickness of the ink layer of each ink area on the printed product and converts it into the ink volume adjustment value, and compares it with the set value, and then corrects according to the deviation value, so as to reach the predetermined speed faster and more accurately Value.
(4) CPC1-04CPC1-04 is another new type of inkjet and register remote control system for Heidelberg presses, which can completely replace the original CPC1-02 and CPC1-03 devices and is compatible with all its functions. The information display of this new control system uses the same plasma display as Heidelberg's CP-tronic, and the operation and display methods are also similar to CP-tronic, thus making the system linkage control of CPC and CP-tronic easier.
The functions of CPC1-04 system are further rich and diverse. The information is represented by images, which is similar to the CP window system, which makes printing control and fault diagnosis operations more simple and convenient, and improves work efficiency. CPC1-04 system register remote control is operated by a set of individual control keys, the procedure is more reasonable.
The control of CPC1-04 ink zone remote control servo motor and plate cylinder registration motor has also been greatly improved than before. Once the ink distribution value of the printed matter is set, the CPC1-04 system can now simultaneously control 120 ink zone motors to control the ink volume, so that the time required for the ink and water ink balance of the whole machine is shortened by more than 50% than before, and at the same time CPC1 -04 can also control more servo motors for registration at the same time than before, thus reducing the preparation time of plate change and printing work.
Used in conjunction with the Heidelberg Plate Reader CPC31 or the Heidelberg Print Data Management System CPC51, the CPC1-04 system can perform preset ink distribution and data storage for more prints than before. For example, the dot distribution information of 50 different prints on CPC31 can be simultaneously converted and analyzed on the CPC1-04 system through a magnetic card. The preset ink volume distribution values ​​are stored separately, which can greatly improve the preset Reliability and efficiency of work. The CPCL-04 system produced later can also perform precise registration control on the glazing unit of Heidelberg's printing presses.
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