In many branches of industry such as the paper, plastics, textile and sheet metal industries, material in continuous, flexible strip form (web) is unwound or rewound before and after processing. A primary goal of web handling is to prevent tearing during all the handling processes. Accurate tension control is required to ensure that the material is wound without forming wrinkles or creases.
As an example an unwinder with one drive on the take-up roller, and another on the pull-off roller, necessitates a control element to balance the speeds of each drive unit. The pull-off roller usually operates in a speed-controlled manner. The material is unwound using a constant web speed. The winder determines the tensile force, while the speed signal from the pull-off roller functions as a control signal. In many applications, the drive for the pull-off roller is not necessary. It can be replaced by a master encoder that delivers the master signal for the winder.
With the Movidrive concept by SEW-Eurodrive, a wide range of functions can be used extensively and efficiently by accessing standard application modules and technology functions built into Movidrive inverter units, including standard IPOS plus positioning and sequence control. For example, for the winding application, the 'Centre tension winder' application is used. This user-friendly interface guides the user through the process of entering the parameters such as fixed diameter and tension must be entered. The application module turns this information into the control programme and loads it into the inverter.
Many winding machines measure the winding diameter to determine and set the correct winding speed. This measurement process can be neglected since the current diameter can be precisely determined through calculation by IPOS plus in the Movidrive unit. The 'Centre tension winder' application module offers the possibility of reducing the tensile force with increasing winding diameter. The winding characteristics can be set in accordance with any requirements.
However large the variety of applications for centre tension winders, the wide range of functions provided by the application modules in Movidrive have an appropriate solution for the task, including choice of fieldbus or terminal control, display of web speed and current diameter, counters for material length, and monitoring for material tearing.
A ‘step-change’ in tracking and monitoring Issue 8 2020, Dahua Technology South Africa
, CCTV, Surveillance & Remote Monitoring, Products
View an overall scene while monitoring a specific person or vehicle, or obtain a panoramic view while being able to zoom in and track particular targets.
Read more...AX PRO wireless alarm solutions Issue 8 2020, Hikvision South Africa
, Perimeter Security, Alarms & Intruder Detection, Products
Hikvision announced its new generation of wireless alarm systems – the AX PRO – delivering comprehensive alarm solutions for both residential and commercial applications.
Read more...Scanning for gold Issue 8 2020, Saflec
, Asset Management, EAS, RFID, Products
The metal detection market is such that customers looking for a specific point solution are becoming a rarity and the primary desire is for a solution.
Read more...V-belts designed for food applications September 2021, Bearing Man Group t/a BMG
, Motion Control & Drives
BMG supplies a wide range of power transmission components, designed to enhance efficiency and safety in the food and beverage sector.
Read more...Control automation excellence September 2021, SEW-Eurodrive
, Motion Control & Drives
Movi-C from SEW-EURODRIVE is a unique automation control system that sets a new benchmark in control automation, embracing Industry 4.0 technology.
Read more...Efficient agriculture systems from BMG Technews Industry Guide: Sustainable Manufacturing 2021, Bearing Man Group t/a BMG
, Motion Control & Drives
BMG’s Boer Slim/Smart-Farming agricultural team works closely with farmers throughout southern Africa, assisting them with the selection, installation and operation of new electromechanical systems. These ...
Read more...Creating factories of the future Technews Industry Guide: Sustainable Manufacturing 2021, SEW-Eurodrive
, IT in Manufacturing
Raymond Obermeyer, managing director of SEW-Eurodrive South Africa, explains that Industry 4.0 includes all the opportunities for digitally networked production.
Read more...Inertial spin filters save energy Technews Industry Guide: Sustainable Manufacturing 2021
, Motion Control & Drives
RTS Africa’s inertial spin filters provide an effective, maintenance-free solution to dust problems in MCC rooms, transformer rooms, control rooms and the like.
Read more...How to avoid false alarms with PIDS Residential Security Handbook 2021: Secure Living
, Residential Estate (Industry), Perimeter Security, Alarms & Intruder Detection, Products
If you have installed a perimeter intrusion detection system around your property, you have taken the first step in protecting your most valuable asset, says Tiaan Janse van Rensburg.
Read more...Risk assessment vs risk management vs health and safety Residential Security Handbook 2021: Secure Living, Alwinco
, Residential Estate (Industry), Security Services & Risk Management, Products
A security risk assessment is not a risk management report, nor is it a health and safety report.
printer friendly version