Trying to do football club logos on tinted acrylic with NEJE 4 MAX
I set it at 25mm above the work piece, 6000mm/min 20 % power.
Worked perfect with the red tinted acrylic, replaced it with blue, same spec, same supplier. Laser made no marks on the surface but engraved the wood sacrificial sheet under it, melting the underside of the acrylic. ???
450nm blue laser cannot engrave and cut blue acrylic