This episode is part of the ‘Web Guiding Applications and Advanced Web Guiding Concepts’ series and focuses on advanced edge guiding techniques, specifically single edge web guiding. The video explains the use of web guides and edge sensors for feedback in guiding mechanisms. It covers the positioning of sensors, the importance of alignment, and the common practice of repositioning sensors during web width changes. The episode also addresses potential operator errors and their impact on web guiding performance during product changeovers.
00:00 Introduction to Edge Guiding
00:08 Web Guide Mechanism and Sensor Positioning
01:06 Challenges with Web Width Changes
01:47 Sensor Repositioning and Operator Errors
00:00 Conclusion
Transcript
Show full transcript (280 words)
So in terms of edge guiding, most of you are familiar with this. We have a web guide and an edge sensor to provide feedback for the web guide mechanism. Last month we talked about the guiding principles and fundamentals of it. But essentially in most machines in edgeguiding kind of an application you position the sensor either on the operator side or on the drive side drive or the gear side and then the web is guided to the middle of the sensor position and the sensor is positioned along the cross machine direction so that the alignment provides the required justification of the web.
The main thing with this kind of a system is that it works well for most cases and for maybe majority of the applications there's no issue with it. The main issue comes when we have to change the web width. Whenever there is a product change over and you do a web width change the sensor has to be repositioned. As we get narrower, the sensor has to be moved to a different location.
That location of the sensor has to be justified based on the process requirement. In these examples, the sensors were moved so that the web center line position is always the same irrespective of the web width. But in certain other applications, it may be necessary to justify along the operator side or maybe along the drive side. So that is the only thing someone has to do in terms of product change over is to move the sensor.
But moving the sensor creates opportunities for operator errors and this can have other consequences with the web guiding performance.