The ultimate minimalist toolhead (MicroSwissNG)

Hi everyone, 

Introduction:
After getting so much from the 3d printing community for free, like Klipper, Mainsail, Eddy NG, OrcaSlicer and countless pre-made stl files which set off my journey to learn Fusion 360 and coming closer to building the 3D printer I dream of.  After many many many iterations and starting over I think this product is finally somewhat ready to present to you guys as a gift back to the community I hope someone will enjoy this as much as me!

Disclaimer:
Disclaimer: This project is NOT for beginners. This project is far from done and requires some hands-on work. Things I want to add later are a closeup macro webcam, LED lighting for the nozzle, a better CPAP tube holder. I thought I better start uploading it now so maybe other people can help me because my days are getting busier with the business we started 8 months ago.

The idea:
The core idea was to build the print-head where you would think "there is barely anything/ that can't work" but is actually packed with BTT Eddy, can bus, XYZ accelerometer and so on. But at the same time built out of mainly one piece. I wanted to avoid having to disassemble everything just to work on one issue, you know what i mean? Like when the extruder gets jammed, you got to remove the fan and the shroud and this and that... No more of this!. It needs to be easy accessible. When replacing/testing new fan duct it must be easy to do! 
No bed probe that hangs out like a d****  which mostly causes less X/Y range and it looks ugly to be honest. Removing the extruder for maintenance is easier than ever with this setup.
Its a shame for Microswiss to hide that beautiful CNC aluminum behind that 3D printer part that you get with it (especially for the price!).
In this minimalist print head the extruder is cooled by the same air as the part cooling air provided by the CPAP fan! That's why you don't see a fan in front.
Power and CAN cables run through the CPAP tube.


I will add details later because i'm leaving for vacation tomorrow but will provide the essential information here:
- The microswiss NG I bought was for the Ender 5 plus originally, BUT I removed the backplate of it for this project so I'm not sure if the extruder itself is universal or not. (If someone knows then please help eachother)
- All threaded inserts I used are M3 I got the 500 pieces M3 kit, aliexpress link here 
- All cables run through the CPAP tube.
- The power cables used are: 2Pin PVC 18awg 3M Aliexpress link here
- The signal cable used is 
- The CPAP tube is a 15MM soft tube Aliexpress link here
- Thermistor is PT1000 from Mellow3d  Aliexpress link here
- EBB CAN 42 v2 Aliexpress link here
- Can signal cable is black, 24AWG - (2Cores), 2M Aliexpress link here
- BTT Eddy -> Make sure its a COIL/USB switchable OR a one that only has COIL. 
- You must run a CoreXY setup for this printhead.
- You must have a CPAP fan for this printhead. Aliexpress link here
- The Linear rail is MGN12H
- Belt used GT2 Aliexpress link here
- Heat shrink tubing is used for all cables going to the EBB42.
- Mellow3D Heater cartridge - 24V 100W (god this heats up fast) Aliexpress link here
- Optional but fun: Hollowed out linear rail and a CNC X gantry. X Gantry link  Linear Rail link
Extra information: The motherboard is BTT octopus v1.1 with TMC2209 drivers.

  
Important details when building:
About the BTT Eddy: You must remove the casing of the BTT eddy, in case you purchased the new USB/coil switchable one then no worries, there is a tiny hole in the backplate where the switch can be reached from before mounting the extruder on it.
You also have to solder off the old connector for USB and solder on fine wires (do it very neat with minimal solder, also solder the wires upwards!) to connect it via CAN to the EBB42.  
IMPORTANT: Before soldering off the connector, you MUST install katapult and the klipper CAN enabled firmware in the first setup before switching to CAN communication and soldering off the connector!!
The washer stl file is for the btt eddy mounting screws so you don't harm the PCB. 
Make sure when you insert the treaded inserts for the BTT eddy that you insert them a bit deeper then the plastic top surface so the insert doesn't damage Eddy.

When mounting the backplate:
Give the belt slack and push it into the backplate, the backplate will grip on the belt and hold it while you mount it with the 4 screws into the carriage, it automatically clamps the belt between the backplate and the carriage.

About the CPAP double cooling duty:
You must make firmware changes so the parts cooling fan is always on during printing.
To get the cables inside the tube (at the start) I temporary use tape and putty to seal off the tube.
Feel around the printhead for air leaks, you can add putty in case your printer didn't print the backplate flat.


Assembly order: 
First Mount the eddy -> don't forget the plastic washers.
Then connect termistor and heater cartridge to the EBB42.
Then mount the EBB42 to the backplate.
Then connect the Eddy to the EBB42
Then mount the backplate to the carriage
Then insert the cables from the CPAP in the 3 holes you see looking in the CPAP mount. (seal it off with some mounting putty!)
Connect the power and can communication.


Hope I didn't forget anything, good luck! Can't wait to see what you guys do with it. :) 

~Tyler N