This changes depends mainly on the wavelength of the laser and on the power density of the laser beam in the focus. The power density is the sum of laser power and focal diameter.
Different laser types are described of their wavelength and output power of the produced laser beam.
For a successful marking, the material has to absorbe laser light with a special wavelength and the material has to be changed thereby.
|Types of Marking|
|Engraving||Metals, Ceramics, Plastics|
|Change in Color, Bleaching||Plastics|
If the marking field is not sufficient, there is the possibility of a greater objective or moving of the material, that should be marked, with external units as p.e. axles.
With an acusto-optical chrystal ( Q-Switch ) the laser beam can be switched on and off very fast or pulsed. Therefore short laser pulses will be produced with high power peaks. The adjustable pulse frequency depends strongly on the material and is to adjust, depending on the laser type, between 0 and 100 kHz.
The Run-up of the laser system and the monitoring is done by a PLC-Control of SIEMENS ( S5AG95 oder S7-300).
The marking ist controled by a PC-Control Board ( RTC-Karte ). This Control Boards owns a processor and can together with integrated hardware functions ( SHT-Interface) work off a marking order autarchic. The marking data has to be programmed in the user system of the PC
Options as Cover Marking, Stepping Motors, external Order Control, Networking to other PC-Systems a.s.o. are possible.