Tevo Black Widow Manual 

to laser and operating it as any reflections from laser can blind you immediately. When you are finished to operate laser disconnect power from it immediately so that you don’t activate it accidentally while 3D printing or operating the printer. Do not put your fingers or other body parts under the laser as it can cause burns. We will not take any responsibility of possible injury or damage to your personal property caused by laser. Installation Remove the hotend/extruder and install laser to extruder/hotend plate.

MKS GEN board as pointed by arrows in following picture. Be careful to connect wire right way so that colours are facing same way as in picture (black and red). Connect the 24V to 12V adapter to PSU Connect the 12V power connector (from 24V to 12V converter) to the module DC jack

do this you have to first drive Z manually so that lens is around 50mm (2 inch) up from bed. Then you can but the safety goggles on and turn on the power of the printer (it is recommended that you put some small piece of metal under laser in case that the laser turns on directly so that you don’t burn hole in heatbed surface.) Next send command from Repetier host (M42 P6 S1) to turn on laser with lowest power. You should now get quite dim spot of laser to surface of metal. Then you can replace metal or the piece you have under laser and replace it with regular paper. Now you can do the fine tuning and adjust the laser spot by turning the “focus screw”. You have to get laser spot to as small as possible.

inkscape.org/en/) and after installing it you have to install repetier laser plugin for it. You can find great instruction on installing and using the plugin from repetier website (https://www.repetier.com/repetier-g-code- plugin-for-inskscape/). For engraving speeds we recommend 100-1500mm/ min depending on material you use and we really encourage you to test to find best combination which speeds will work best for the material you will use.