The present disclosure relates to a method for creating a job from a central operator software for various laser types, in particular a laser plotter or a galvo marking laser, for engraving, marking, lettering and/or cutting a preferably flat workpiece, in which at least one beam source in the form of a laser is used in a housing of the laser device for processing the workpiece. The workpiece is deposited in a defined manner in a processing chamber on a processing table and a laser beam emitted by the beam source is sent via deflecting elements to at least one focusing unit, by which the laser beam is deflected in the direction of the workpiece and positioned accordingly. The control is effected via control software running in a control unit, in which software a so-called job is processed.

In one example, an apparatus includes a plate configured to pivot about a pivot point, a pulley coupled to a first planar side of the plate and configured to rotate a belt, a motor coupled to the first planar side of the plate and configured to drive the pulley, and a torsion spring coupled to a second planar side of the plate that is opposite the first planar side and configured to apply tension to the belt.

In one example, an apparatus includes a plate configured to pivot about a pivot point, a pulley coupled to a first planar side of the plate and configured to rotate a belt, a motor coupled to the first planar side of the plate and configured to drive the pulley, and a torsion spring coupled to a second planar side of the plate that is opposite the first planar side and configured to apply tension to the belt.

Methodology of characterizing pore size and distribution in a porous thin film having a surface, or in a surface region of a porous semi-infinite bulk substrate having a surface, involving applying a mathematical model of a sample based on a Bruggerman effective medium.