Abstract: This paper describes software of Dorna EPS collection servo program on sleeve Labeling machines based mostly on evaluation of operating principle of sleeve Labeling equipment. Configurations of vital of parameters of servo drives are also offered.
1. Introduction
Sleeve labeling machine is to put sleeve labels of coloration-print trademark movies on bottled FMCG, which includes bottled drinks, cosmetics, prescription drugs, wellness products and so on. Sleeve labeling speed decides packaging equipment performance. For example, in fruit juice manufacturing strains, the recent four hundred bottles / min sleeve labeling velocity is tough to fulfill manufacturing needs and sets of sleeve Labelinging is turning into a ability bottleneck for higher-finish customers. Far more and much more companies want to get revenue by escalating sleeve labeling speed.
2. Composition of a sleeve labeling equipment
A sleeve labeling equipment includes PLC, HMI, servo program and other elements.
Much better responsiveness of PLC and servo delivers higher creation effectiveness. PLC demands to have a number of groups of 200 KHz or over pulse output channels and enter channels. Meanwhile fundamental instruction execution time wants to be quick. Pulse modulation curve (deceleration curve among highest working frequency and bare minimum running frequency) need to be smooth. Also acceleration and deceleration ought to be quick. Servo motors obtain PLC pulse commands then feed labels and reduce labels. The visual appeal of a sleeve labeling equipment is demonstrated in Determine 1.
Determine 1 Visual appeal of a sleeve labeling machine
3. Description of doing work principle of sleeve labeling machines
Coiled labeling materials is employed for feeding. When sensors detect bottles, label feeding motor starts to run and will end soon after ending label feeding. Then label reducing motor commences. When bottle pushing electric powered eye detects bottles coming, bottle screw will drive bottles and array bottles in equidistance and equal original velocity. Trapping labeling electric powered eye senses bottle coming and instantly transfer the information to PLC. PLC in change, continuously concerns four directives: label feeding, positioning, label reducing and label-shooting. When label-taking pictures ends, sleeve labeling approach is comprehensive and system enters label finishing & contraction section.
four. Dorna servo parameter options
Label feeding and reducing requires frequent starting up and stopping of motors and have substantial demands for servo motor responsiveness and brakes. On situation of no stunning, increase situation loop, velocity loop and electrical recent loop obtain parameters. Set servo handle, gear ratio and other parameters, and then reciprocate take a look at. If the positioning accuracy and velocity meet the requirements, commissioning is complete If not, then improve the speed loop gain, at this time if the motor is stopped or overshoot or jitter, or the motor has sound, then means loop control parameters are too robust, then lower proper or improve the integration time consistent until finally the placement and speed precision meet up with the specifications, then the placement loop and pace loop proportional and integral time continuous are the acceptable values.
Parameter settings for Dorna servo control program used on a specific ZheJiang sleeve labeling machine are offered under.
PA4= (handle manner assortment, : position manage)
PA9=five (motor design selection, different dependent on motors)
PA11=3000 (placement loop acquire, variety five hundred-8000)
PA14=1500 (velocity loop achieve, selection 500-8000)
PA15=5000 (velocity loop integral time continual, assortment five hundred-8000)
PA31=5(enter instruction pulse multiplication numerator)
PA32=1(enter instruction pulse multiplication denominator)
PA38=1500 (current loop acquire, range 500-8000)
Observe: digital gear ratio=PA31/PA32==Ppulse / P
Exactly where Ppulse: Amount of pulses per revolution of the motor, i.e. number of pulses from motor comments factors for every revolution of the motor (pulse/revolution). For a 2500-wire increment encoder, the variety of opinions pulses to the driver is 2500×4=ten thousand
P: Number of instruction pulses that require to be obtained by the servo from the host computer to empower 1 revolution of the motor (pulse/revolution)
5. Notes for commissioning
To ensure reliable, stable, and appropriate procedure of the servo driver, shell out attention to the subsequent issues throughout installation, commissioning, and use of the servo program:
1) Correct wiring: Dorna servo is created with standard encoder wires and motor power wires. Nonetheless, during wiring, usually make positive to appropriate the signal wires amongst the servo driver and the controller, normally the servo will not function usually
2) Set appropriate servo management method: As every single variety of machine has various purposes, appropriate environment of servo manage manner is the precondition for typical operation of the servo
3) Match acquire parameters correctly relying on true operation benefits. In addition to, Dorna servo should not established electronic place loop and gear ratio parameters in servo enabling method or in the course of operation of the motor
4) Make certain proper grounding of the motor. Hook up the driver to products enclosure to stay away from disturbance and leakage present.
5) Sign wires ought to adopt shielded twisted pairs as significantly as feasible. The shield layer is normally connected to terminal shell
six) Pay focus to interference troubles to stop the encoder signals and management alerts from getting disturbed. Encoder wires and signal wires need to not be tied with each other with motor traces and electricity provide lines or run in the exact same cable tray with them. They must be routed at a specific length.
six. Conclusion
This sleeve labeling device achieves optimum client fulfillment by taking advantage of attributes of Dorna EPS series which includes rapid reaction, exact positioning, quick setting time, and stable operation. This tools makes a complete exhibition of positive aspects of Dorna servos, which will help boost aggressive ability of sleeve labeling equipment.
