Operating at a wavelength of 355 nm, the TruMark 3330 opens up new possibilities for marking plastic workpieces, says Trumpf. This is because synthetics absorb the energy of shortwave UV light far better than infrared laser beams.
Thanks to its beam quality of M² < 1.5, the laser can be focused to create a very small beam spot. The laser power absorbed by the material causes a reaction in the plastic, one which is primarily photochemical. According to Trumpf, this type of machining is exceptionally gentle on the material and yields good surface quality. At the same time, the high pulse-to-pulse stability in the TruMark 3330 is said to offer dependable reproducibility and uniform quality of marking.
