Confession time: This is another one of those “not needed but is a cool mod that might help” accessories for the P1P/P1S.

Moving on from my “nozzle clog minimisation” piece (Bambu Lab nozzle clog minimisation by Rick269 - MakerWorld), I decided to make a part that would both help prevent the heat from the bed from affecting the fan's performance and would also make maintenance easier. I was inspired by others that have made parts to attach the fan to the front cover and others that have attached the fan to the centre piece. This is what I have been able to come up with and achieves both.

Does it work? Well to be honest, I haven't done any really long prints since fitting it, so I can't be certain. Nozzle clogs occurrences seemed to be reduced with my other minimisation tool, and I believe this work just as well.

The two parts sandwich the hotend fan and form a duct which helps the fan draw air from only the intake holes (or big hole if you've cut it out to maximise flow). The completed “fan/duct assembly” then attaches to one of the part cooling fan mounting screws, so it's attached to the front cover permanently. Now there's no need to remove the fan when changing hotends! Just remove the 2 hotend mounting screws, 2 plugs and swap it out.

I strongly suggest printing the parts in ABS, ABS+ or PETG minimum (should be ok)

No extra hardware is needed. The two fan screws are re-purposed to become through-bolts which join part A & B to either side of the fan and then the assembly attaches to the front cover using one screw that holds the part cooling fan on. The extra hole on part A is so you can put an allen key through the part to tighten the screw.

The front cover may be a tight fit afterwards. You can test fit the assembly with the cover off to make sure it's all going to fit before attaching it. I have found the easiest way is to seat the top part of the cover in first, followed by the bottom. Make sure you have the heater and thermistor wires tucked up so they don't get squashed by the fan & duct assembly on installation!

Lastly, to make maintenance/changing hotends easier, consider downloading my toolhead cover hangar :) P1P/P1S toolhead cover hangar by Rick269 - MakerWorld