NeoBurner for Ender 3 Neo Printers

This is a hotend I designed specifically for the Ender 3 V2 Neo as a direct bolt-on using the stock fan types. It is based on the Voron AfterBurner design, but made to mount directly to the Ender Neo carriage. I've always liked the looks of the Voron type hotends, but also like that this is fairly modular so that users can upgrade one fan or the other relatively easily.

I did discover after printing the hotend that it would require a slimmer cover for the X axis limit switch and drive gear, so I included that. There are two versions of this part, one that has a built in support, which I paused my print at that point and put a single layer of scotch tape over it to have a nice smooth surface with easy release. The other version will require you to use supports on your slicer.

No other parts should require supports. Layer height should be 0.2 for best results.

This design retains the same offset on the CR Touch as the original bracket.

I designed it so that no wires need to be cut or disconnected if you don't want to.

Hardware requirements:

• Heat Set Thread Inserts M3x5x4 Voron Style (I used Ruthex) qty=13
• M3x35mm socket cap screws qty = 2
• M3x30mm socket cap screws qty = 2
• M3x25mm socket cap screws qty = 2
• M3x12mm socket cap screws qty = 4
• M3x8mm socket cap screw qty = 1
• All other hardware should come from the stock Neo hotend

I included an exploded render of my model to hopefully make it easier to see how the assembly goes together.

Assembly

1. Install the original Neo hotend into the lower body. The wires for the heating block should route easily on the opposite side from the CR touch. When installing this, you will need a short piece of bowden tube to connect the hotend to the upper body. This is the same as the bowden model on the original AfterBurner. Mine sticks approximately 7.5mm beyond the highest point of the lower body. The two lower body pieces are held together using two M3x35mm and two M3x12mm screws.

2. Install the lower body and hotend onto the carriage using the original screws. Route the wires as shown in the pictures. The CR touch and wiring for both fans can be routed between the upper and lower bodies.

3. Install your bowden fitting into the collet addapter, which slides into the upper bowden adapter.

4. Place the upper rear plate behind the carriage and align the upper bowden adapter with it. The bowden adapter needs to be installed at a careful angle so that it fits over the piece of bowden tube from the lower body and the square pin engages with the carriage plate and rear plate. It's tricky, but it works. Be careful not to pinch any wires here, they should all slide freel between the upper and lower pieces. Once in place, the rear plate is fixed to the upper bowden adapter with two M3x25mm and one M3x8mm screw.

5. The 4010 blower fan fits horizontally through notches in the upper fan housing. Guide the wires through the channel in the back of it and place it onto the upper body.

6. Press the 4010 fan into the fan cover and guide its wires into the channel as you place it over top of the upper fan housing. Attach to the upper body with two M3x30mm screws and the lower with two M3x12mm screws.

7. For the X limit cover, simply disconnect your wiring from the existing limit switch, take the two screws off and slide the limit switch out from the cover. Then reverse this process with the newly printed cover.

8. Insert your bowden tube into the fitting until it reaches bottom. About 45-50mm depending on your fitting.

I appreciate any feedback on the design or if there are any suggestions on changes to make this better for you as a user. The Voron assembly instructions for the original AfterBurner can also be a good reference to help you through the assembly.

Thanks!