The versatility of a laser machine has been proven in a variety of materials, from thin paper to thick plywood. However, it is very important to ensure that the laser beam is focused correctly in order to avoid undercutting, burn-in and other defects that can affect the quality of the final product. This can be achieved by choosing an appropriate lens, which can be short, long or medium focus. What is the difference between them?
Long-focus lens - has a big distance between the head of the transmitter and the machining zone and provides quality cutting of thick materials in one pass: from 8-10 mm and more. Not suitable for delicate surfaces or high-precision engraving, as it gives a large light spot.
Short-focus lens - used for precision cutting of small elements of thin materials and high-precision engraving, for example, in the manufacture of any seals, including those that comply with GOST. The laser spot obtained after the flow through the short-focus lens has the smallest possible diameter, which is a fraction of a millimeter.
