Cobra Toolhead - Linear Rails Direct Drive Mount for Orbiter 2.0 & Rapido Hotend HF (Ender 3, Ender 5, Aquilla, Neptune)

Toolhead to be mounted on every 3D printer with Linear Rails MGN12H mounted on side (not on top of aluminium extrusion). Remix is adapted to use with Orbiter v2.0 extruder and Rapido HF hotend. 

On images toolhead mounted on Biqu B1 (if you are interested in full Biqu B1 modification, please look on my other projects).

 Design is using heat inserts M3 (OD 4.2mm H3mm). Full list of BOM is available in original project (pasted below to make instruction complete):

- Phaetus Rapido HF Hotend
- PTFE tube
- Orbiter v2.0
- 2x 5015 blower fans
- 25x25mm fan or 40x40mm fan 
- BLTouch or Microprobe (optional - Microprobe is much more accurate)
- ADXL345 Accelerometer (optional)
- 2x M3*6mm screws (for the accelerometer, optional)
- 15x M3*8mm screws
- 4x M3*10mm screws (2 of which for the optional BLTouch)
- 2x M3*14mm screws
- 4x M4*18mm screws
- 4x M2.5*8mm screws (included with the Rapido hotend)
- 5x M3 nuts (2 of which for the optional BLTouch)
- 13x M3 insert (2x for optional ADXL345, 1x should be shorter, used to mount 5015 fan - marked below on assembly image with red circle)

IMPORTANT: Accelerometer cannot be attached in case of using 40x40 fan. 

Print orientation is presented on image:

Please ensure that main body after flip is touching build plate correctly (showed also on image).

Print information:

• ABS/ASA
• Suggested infill: 40-60% (not applied for 25x25 or 40x40 fan mount)

Also in credit to original design is kept built-in support for GT2 belt (image copied from original design). Please remember to remove it after print:

Assembly:

1. Insert all heated inserts
   
2. Mount main body to Linear Rails
3. Mount Rapido hotend to main body
4. Cut PTFE tube to correct length (ensure to do it as precise as possible) and insert into hotend
5. Mount Orbiter extruder
6. Mount 5015 fans to fan bodies
7. Mount fan bodies to main body
8. Mount hotend fan body to Rapid hotend
9. Mount hotend fan
10. Mount belts and tighten them

Parameters:

• BLTouch offset:
  • X = -49mm
  • Y = 0mm
• Extruder steps, current etc. - according to Orbiter v2.0 documentation
• Rapido hotend - default thermistor: ATC Semitec 104NT-4-R025H42G

In case of any question, feel free to ask them in comments.
I would really appreciate adding realizations in appropriate section.