Hi thanks for the reply everybody! maybe my question had not enough info. i am building a machine like this: http://public.iorodeo.com/docs/laser_cutter/index.html
i have a 3d printer using duet wifi and works perfect. if i read correctly using the fan port can only switch laser on or of for cutting purposes (am i correct?). my question is if there is a possibility for engraving?

hi, does anybody know how to convert 3d printer with duet wifi to drive a lasertube for lasercutting and engraving?
thanks for your help!!