high adjustment accuracy quick cutting perforation.the bm111 series is an automatic focusing fiber cutting head introduced by the 
swiss raytools ag in 2017. the products has a built in motor drive unit which automatically changes the position whithin a range of 22mm by a linear mechanism to drive the focusing mirrors the user can continuously set the focus through the programe to complete the rapid performation of the thick plate and automatically cut the plates of different thicknesses the product incorporates the d30’s compound lens group to integrate the light beam,optimizing the optical and water cooled design so that the laser head can continue to work stably for a long time under high power