Distance Measurement for Nozzle Positioning During Roller Coating with Laser Distance Sensors Triangulation

The rubber coating of pressure rollers, for example, is done in individual, multi-layer coatings. To do this, the roller is rotated while a nozzle unit for material application moves slowly along the roller and thus applies the coating. To ensure an even rubber coating, the nozzle must be continuously tracked. The analog distance measurement required for this is performed by a laser distance sensor triangulation. To avoid damaging the material, the distance measurement to the roller or the upper rubber coating must be carried out without contact.