DFS (Dynamic Focus Shift), perfect laser markings also on non-flat surfaces.
SISMA DFS consists of a third optical axis that can be integrated in SISMA laser markers (selected models) allowing perfect execution of markings on non-flat surfaces or on flat surfaces with differences in Z (height), within a certain interval depending on the focal length used.
SISMA DFS is able to follow vectors identified by 3 coordinates (x, y, z) and therefore to work on irregular surfaces proceeding at the same speed achievable in machining on flat surfaces (the speed of movement of the mirrors reaches 4000 mm/s).
The accessory consists of an additional lens into the optical system which, as it moves, changes the focal point within an interval that depends on the focal lens itself: for example for a focal F160 this interval corresponds to ± 30 mm compared to the position 0, while for a focal F254 it corresponds to ± 70 mm with respect to position 0.
Through a visual centering system with the aid of the aiming beam it is possible to obtain an accuracy of approximately 0,6 mm in the alignment between the virtual project and the physical piece, offering the possibility to work also unique pieces without fail.
The integration of SISMA DFS on SISMA markers is highly recommended when you have one or more of the following needs:
- mark non-flat surfaces quickly and without having to physically move the scanning head (to change the focus position).
- mark in combination with a rotary axis to work objects with non-simple shapes.
- mark textures on non-flat surfaces, in combination with the new SLC3 software.
SISMA DFS is an accessory that can be integrated in SISMA stand-alone laser marking systems and workstations.
Some examples of use include: fast markings on round objects, processing on molds, working on objects that require flat markings at different heights, marking of prostheses, marking of resin models in the footwear sector, de-metallization of deflectors in the automotive sector, high quality marking on non-flat objects (eg eyeglass frames), marking of precious rings (inside, outside), marking of oval bangles.