Elegoo Neptune 2 filament runout sensor housing replacement

thingiverse

# What is it? This is a replacement part for the Elegoo Neptune 2 filament sensor cover. # But why? Hey, you asked, so here is a ramble. After having my printer (and using it extensively) for just 3 months, the brass grommet where the filament feeds into the sensor has worn down quite a lot and is causing some filaments to bind or squeak really loudly while printing... neither is all that desirable.  I looked around and found [this solution](https://www.thingiverse.com/thing:4880710) by MantisGod01 which adds an extra attachment on top of the filament sensor to attach a PTFE tube to guide the filament into the sensor. However, I use that same technique already for other attachments -- like a [sharpie blender](https://www.myminifactory.com/object/3d-print-sharpie-marker-color-blender-3d-print-custom-colors-and-gradients-3-and-6-marker-version-138353) I made specific to the Neptune 2 (I will share this soon) -- so I wanted a solution that doesn't prevent other attachments. I had the idea of using a bamboo chopstick, as bamboo _should be_ both resilient and slippery enough for this use (though I will keep you posted on long-term usage). # What's included? There are 3 different covers included here: * the original cover as created by Elegoo * a cover that has a 9.5mm hole for a PTFE fitting * a cover that adds a small cutout to glue in a piece of bamboo chopstick to take the place of the metal grommet # What extras will I need? That depends. If you just want a replacement cover (who doesn't want to print a colorful cover), you can use it directly. I guess you could look into putting a new brass fitting, but I have no idea what those are called or how to find one. Let me know if you do. If you want to use a PTFE guide tube, you'll need a PC4-M10 Fitting, the tube itself, and something you can attach on the other end (or honestly, you can use just a couple of inches of tube and let the other end dangle). The Neptune Elegoo 2 came with an extra one of these fittings. If you want to use the one with a "bamboo insert", you will need some of those chopsticks that come attached that you have to break apart yourself. The end bits are roughly 7mm wide. You'll need to cut a little bit off that end, drill a hole in it, and sand it down for a friction fit into the cutout. Feel free to also use super glue. Honestly, I don't yet know if this is a good idea because I just started using it. Feel free to ask me in the comments if I forget to update this message. # Can you share a step file or something, I've got an idea? Well... no. But that is because I designed it in TinkerCAD. That design is public though, so you can go make a copy of it and edit it here: <iframe width="100%" height="500" src="https://www.tinkercad.com/embed/3t9ck8QzxlM?editbtn=1" frameborder="0" marginwidth="0" marginheight="0" scrolling="no"></iframe> Feel free to make your own improvements and share them back here. I'd love to see what you come up with!