Heatsink Fan Duct for Bambu Lab P1S (Remix)

With High Flow Nozzles  (CHT) and when printing with PLA and due to the improved heating of the micro swiss hotend you have to adjust the print settings / print temperature and take care of retraction settings etc. because it is really easy to get too much heat creep and clogged nozzles/ clogged extruder. 

Even with well adjusted settings (you should really print PLA with lower temps), it is sometimes not easy to get a stable print, especially with some certain filaments (looking angrily at you, Anycubic HighSpeed PLA). 

So I found this addition to the BambuLab HotEndFan Section from microswiss, but could not really understand the idea, as the added wall just seperates flows – I am no CFD Expert but from my layman point of view, I would have thought concentrating the complete airflow to the cooling fins would bring more improvement. 

Therefore I created this remix. I had printed it quite some time ago, but only mounted it recently, after the HS PLA was giving me some headaches in a recent print.

I had two failed prints (after 1h 30m and the second a little bit earlier) and as each time I had to disassemble the hotend/extruder anyway I added this little thing. The next print was successful (with same settings), so I hope this was a real improvement.

I printed it in ABS to be sure about temps. I also heated the nozzle for a while to 250°C, but I could easily touch the cooling fins (don't do this yourself, it could be different in your case) and also no effects to be seen on the printed fan duct. 

The remix model is a combination of the original .stl and some additional designed part and some negative part. All those have been combined directly in the BambuStudio slicer, but the exported .3mf file was adjusted in OrcaSlicer. I could not combine those parts into a new stl, as the boolean mesh failed. But it should slice nicely, and with the 3mf you can fine tune it yourself if you see the need for it.