The invention relates to a method for switching a particulate material flow in the construction of models in layers, wherein particulate materials are fed to a subsequent method step from a container having an opening in the direction of a workpiece platform. The sliding sleeve is formed with a locking body thereon. The mandrel is mounted through the rotating sleeve and has a positioning groove formed around an outer surface of the mandrel. A first and second plurality of teeth is provided along an extent of the first and second arms, respectively. The device also provides, to the optical transmitter, a request to adjust an optical channel wavelength to the determined wavelength. The resource allocation message includes a field for allocating resources in a first domain, where at least one bit of the field is stolen to allocate resources in a second domain which is different from the first domain.