Mechatronic damping for contact rolls in film winders
Abstract
The winding of a web is one of the most extensive and error-prone processes in web handling. All known solutions are limited in the range of properties and production parameters. To broaden the mentioned limits, a new mechatronic system for the feeding drive of the contact roll has been developed. A comprehensive simulation with several models has shown the behavior of the new system. The model considers in the final state the elasticity and mass of all relevant elements. The main functions of the feeding drive operating the contact roll for positioning, pressing against the winding roll and for the active damping have been modeled. The simulation has revealed the avoidance of backlash in the feeding drive as the most important factor for the winding result. The second important factor is the damping of the contact roll. The principle of the new system involves the application of an electric linear motor for the feeding. This drive is free of backlash. The linear drive as a part of the control loop is featured by a simple remote control according to the most relevant parameters in the winding process - the nip pressure and the damping of the vibrations excited by the rotating winding. A test stand consisting of the components of a real feeding drive assembly was built to verify the simulation results. The test results confirmed the simulation results. The results in industrial applications have shown the congruence with the results of both the simulation and the test bed. The new drive has been introduced in film stretching lines. The results in industrial applications have shown the congruence with the results of both the simulation and the test bed. Especially the remote control of the contact force and the damping are the most important features. The quality of the wound roll has been improved significantly.
Citation
Sieber, B. (2007, June). Mechatronic damping for contact rolls in film winders. Paper presented at the Ninth International Conference on Web Handling (IWEB), Stillwater, OK.