Prusa MK3 Light Nozzle 45 degree R3/B7

thingiverse

Today I crafted a light nozzle. It annoyed me that you see nothing when printing directly under the extruder. Other LED nozzle conversions I found also not good because they usually only illuminate the nozzle itself. The nozzle is from the current version R3/B7. To make the conversion, you'll need: 2x white 5mm LEDs with a minimum of 18000mcd 1x 1KOhm resistor (possibly 1.2KOhm, depending on your LEDs) A few thin cables (long enough to reach the Einsy board) A soldering iron and a steady hand 2x open cable connectors won't hurt either (take something decent since the LEDs are directly connected to 24V) Assembly: As you can see in the pictures, simply insert the LEDs into the holes and then sand them down to the nozzle using a file or sandpaper. This increases the scattering angle of the LEDs from just under 60° to over 130°, resulting in brighter points below the LED. Next, connect the LEDs using a parallel circuit (+ to + and - to -), visible through the different leg lengths (long +, short -). At the nozzle is a small resistor holder; I don't have one yet. Then, mount everything as shown in the pictures. Integrate the cables into the harness (I did this with my R7 update). Crimp or solder proper cable connectors (open in my case). Before connecting, double-check the polarity !!!!!!!! Finally, connect the 24V connections below on the Einsy board (I used the middle two as they're probably for the heating bed's 24V input, + left, - right). You can add a switch if you want, but I chose not to.