Giotto FIBER is a marking unit based on diode pumped solid state laser sources. The laser is composed of a Galvo scanning head connected by fiber-optics to a small rack which contains the air cooled source, the control interface electronics. Giotto FIBER, thanks to its reliability and to the extremely compact size both of the Galvo head and of the rack (19''/3HE) is easily integrated in production lines where it is used for marking on the fly applications. Giotto FIBER is configured with different options which ensure a remarkable application flexibility and enhance performances such as the dynamic controls of the fire point and of the spot size. Two different types of Galvo heads can be mounted for faster speed and higher focusing. Giotto FIBER is driven by a Personal Computer and by the Software ICARO Windows The user can easily change the work parameters such as power, frequency, marking speed so that the required performance is obtained. Graphics in different CAD formats (*.plt, *.dxf, *.pcx, *.bmp, *.mcl, besides machine formats) can be imported and the text can directly be changed (all the windows fonts are used) graphic editing operations are also possible.