Prusa Nextruder Shroud (Tested)

update: 

see my test samples and a short write-up under the makes section 

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Line-of-sight issue fixed!!!

Testers needed, I can't print PC Blend Carbon Fiber at the moment (as per Prusa requirements for this part) so I printed it in PLA just for the visual and fit test (see photos). 

This is not perfect but I suspect it will help a fair bit. Hopefully it is a good usable shroud until someone designs a shroud that solves all the issues. It would be awesome to collab with someone that has better design skills than me to make further minor adjustments to this model - I've run out of talent but I have a few more ideas :P 

Problems with the current shroud:

• Line of sigh between shroud and nozzle tip blocked (fixed in this new design)
• Air not properly directed and from one side only (not fixed)

See the photos, the new shroud sits a bit lower to fix the line-of-sight issue but it is still higher than the nozzle so it shouldn't hit anything on the print bed. Please inspect that this is also the case with your setup so that you don't damage your printer, needless to say you install this part at your own risk.

Prusa suggested print settings:

For 0.6 nozzle

• Parts from PC Blend Carbon Fiber
  • print settings**: 0.25mm QUALITY, 4 perimeters, 30% Grid infill

For 0.4 nozzle

• Parts from PC Blend Carbon Fiber
  • print settings**: 0.20mm STRUCTURAL, 4 perimeters, 30% Grid infill

NOTE - I fit tested it on my XL Nextruder but I assume it is the same as the MK4 Nextruder. If you are downloading this for the MK4, please make sure they are the same…

Changes I made:

• Extended the interface between the shroud and the fan so that the shroud sits a bit lower.
• Moved the screw holes by the same amount so that it aligns with the screw holes on the nextruder.
• Altered the slope angle of the internal ducting so that it uses the same aerodynamic principles of the original shroud. 

Note that I didn't change the exit port and I also didn't decrease the internal ducting thus there should be no reduction in airflow (TBC). This seems to be the issue with all the other attempts that has failed thus far.