Based on the Profibus bus Kinco servo system solutions applied research - Industrial control -

One, the preface

flexographic printing press ( 柔性版印刷机) , flexible, through the checker is to use the ink roller transfer ink to complete the printing process of the machine. The flexographic printing machine has become a mainstay of packaging and printing industry is widely used in environmental protection printing and packaging industry, such as food, medical, books and periodicals, cosmetics and other industries of labels, wrapping paper, paper bags, paper boxes, paper and other printing processing. Can the device application range is wide, suitable for coated paper, copy paper, aluminum foil, stickers, paper, non-woven fabrics and a variety of materials such as BOPP, PET plastic film printing. Machine, the printing, die-cutting, indentation, punching, folding, waste discharge, zhang ping, cutting, hot stamping, fumo, adhesive strip printing and composite unit, fully USES the servo single shaft driving control technology and closed-loop tension control, tension stable printing, set of accurate, easy to operate, fully meet the needs of the various printing occasions. The network between the roller and version of roller pressure control is key to the core of the whole production line equipment, its pressure control precision directly affects the inkjet, which determines the printing quality of the finished product. Early flexographic printing press pressure control adopt mechanical transmission control, low printing precision, mechanical transmission noise big, short service life. In the late 1990 s, started using independent motor drive control mode, the printing precision and speed is greatly improved. And the control system of form a complete set of a variety of ways. Is introduced in this paper based on servo in mandrel Kinco flexo machine pressure on Profibus fieldbus control system solutions.

2, technological introduction

in the picture above, each printing unit net roller with version roller respectively by the left and right sides of the servo control, when I received the central control system of the machine is start signal quickly roll down, version of the roll inward to us pressure position, according to the different precision fine-tuning of print products to achieve accurate pressure control.

a single set of printing unit system flow diagram below

3, system structure four, system requirements:

between a single set of printing unit must ensure accurate positioning, positioning accuracy is 0. 5毫米; Pieces

main HMI via Profibus bus monitoring a single set of printing unit servo operation state, running state of real-time display various servo motor; A single set of parameters can also be through a single set of HMI set!

automatic mode, each printing unit must be started at the same time, at the same time reach the location! Time error is less than 500 milliseconds. Any pieces

automatic mode, the motor has a fault alarm, the group to immediately stop work, According to the need even to immediately stop all other printing unit) ! Time error is less than 100 milliseconds.

all process can be in the main console operation, also can be a single set of manual fine tuning, convenient maintenance and repair, maintenance!

five, the implementation way:

pieces of Siemens S7 - 300 PLC controller through Profibus bus control function, simplify the programming, solved the pulse and direction control mode, wiring is numerous, throw the pulse caused positioning accuracy, poor anti-jamming capability shortcomings; Pieces

system configuration Profibus bus to 12 MBPS speed to ensure the control accuracy, to flexo machine configuration at least eight group printing unit 32 shaft system as an example, the main control unit can signal within 100 milliseconds passed to all 32 axis, excellent guarantees the system synchronization starts, so the system error is small, high precision printing. Six, system configuration:

seven pieces, solution

Kinco newly listed independent intellectual property rights of high density of magnetic motor, with 300% of absolute power overloads, true IP65 protection grade, low torque ripple, excellent dynamic response, elegant appearance design for customers;

mixer system printing error smaller, faster printing speed, high efficiency;

communication speed: Profibus bus to 12 MBPS speed, shorten the communication time, raised the speed of the system, to overcome the traditional 485 slow communication communication, exchange data quantity is little, the disadvantage of easy to cause the clogging in communication systems; Pieces

programming and maintenance workload, less past control way is each printing unit has a separate PLC controller to control the servo, and to ensure that the two servo synchronization completely, so the unit of PLC controller programming is need to be independent. Workload is big and complicated, so the system fault point increase at the same time, lead to system maintenance workload increases; This system is all control programming on the main CPU and programming using modular programming read maintenance is very simple. Equipment failure can only need to replace the corresponding fault equipment, without having to download the program again. Different technological requirements also only need to type the different process parameters, no additional programming.

facilitation operation: all servo drive unit are connected directly to the Profibus bus, the CPU to set parameters of each printing unit, running state monitoring, further strengthen management ability, simplifies the operation and maintenance is very simple; Pieces

strong fault detection and processing power, the CPU via Profibus bus real-time monitoring the running state of the servo, timely send status information and fault information displayed on the HMI, the CPU can also according to each servo drive malfunction and the other from on the bus station take corresponding processing.

eight, summary

Kinco servo in the flexographic printing presses and pressure control of Profibus bus solution has been successful in several large domestic flexo machine manufacturers have successfully applied, is Kinco ED series high-performance servo driver with Kinco SMH series is the perfect combination of high flux density motor application!
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