I added a UV laser diode to an old CNC. The purpose of the laser is to engrave, so I dialed it down to less than one watt so it wouldn't scorch the paper and emulsion.
The image is dark because the emulsion is photosensitive.
The CNC software is LightBurn, which allows multiple path options. The one in this video is 45° to horizontal.
The laser driver and diode are from [ Ссылка ].
The cyanotype emulsion is a standard ferric ammonium citrate mix.
The paper is Arches Platine.
![](https://s2.save4k.ru/pic/hfJuStoGJY4/maxresdefault.jpg)