Method and apparatus for reeling control

A method for controlling reeling in a reeler used to wind up a web being made, and traveling in a machine direction, the method comprising the steps of:

• winding a web being formed onto a reeling core, to form a reel by directing the web over a reeling element and in to a nip formed between the reeling element and the reel, and loading the reeling core and the reeling element against each other to form the nip;
• monitoring the movement of the web into the nip with electromagnetic radiation using at least one device selected from the group consisting of:
• a line camera, a digital camera, a video camera, a line laser, a distance-measuring laser(s) and a computer vision apparatus;
• and
• automatically detecting at least one event deviating from normal reeling, in an area leading in to the nip selected from the group consisting of:
• an interference in the shape of an airbag, superfluous objects appearing near the reeling nip, loose pieces of paper, or a double web edge, the web drifting into a wrong place, a piling up of the web, and a web split in the machine direction.

An apparatus for controlling reeling in a reeler used to wind up a web being made, the apparatus comprising:

• a reeling element;
• a reeling core, around which the web is reeled to form a reel, the reel forming a nip with the reeling element;
• elements for loading the reeling core and the reeling element against each at the nip;
• a monitoring device of the type for detecting electromagnetic radiation of a visible or invisible wave length, the monitoring device selected from the group consisting of a line camera, a digital camera, a video camera, a line laser, distance-measuring laser(s), and a computer vision apparatus;
• wherein the monitoring device is arranged to view an area leading in to the nip;
• and
• a means for automatic detecting in the area leading in to the nip, an airbag, superfluous objects appearing near the nip, a double web edge, a web drifting into a wrong place, piling up of the web, or a web split in the machine direction.