General questions about fans and ventilation

Bambu Lab X1 Series General discussions
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General Questions about Fans and Ventilation

Hi, I miss an overview or recommendation on how to handle the different options with fans and ventilation.

The part cooling fan should always be on, right!?

For the auxiliary fan (aux fan), I see different opinions.

Here is an AI-generated overview of when the auxiliary fan (Aux Fan) should be turned on for various filament materials:

Filament Material Auxiliary Fan (Aux Fan) Chamber Fan Door Position
PLA Usually off or on low setting (around 20-30%) Off, to maintain a stable temperature Open, to improve air circulation
ABS Usually on (around 50-70%) On, to evenly distribute heat Closed, to maintain a constant temperature
PETG Usually on (around 50-70%) On, to evenly distribute heat Open or closed, depending on ambient conditions
TPE/TPU Usually off or on low setting (around 20-30%) Off, to maintain a stable temperature Open, to avoid overheating
ASA Usually on (around 50-70%) On, to evenly distribute heat Closed, to maintain a constant temperature
PA (Nylon) Usually off or on low setting (around 20-30%) On, to control humidity Closed, to maintain a constant temperature and low humidity

Does this align with your experiences?

Another question about the activated carbon filter: is there also a fan for this? If so, doesn’t this also lower the temperature of the enclosed build chamber? Can this be turned off?

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No, pretty much the exact opposite for the AUX fan.

ABS/ASA is going to have issues with it on.

The Chamber fan setting reasons are either wrong or don’t make sense.

The door position/filament seems right.

The chamber fan is “the activated carbon filter”. Yes it will lower the chamber temp if used as it draws in outside air. Yes it can be turned off.

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I don’t think it’s wise to trust the AI on the AUX fan recommendations. The settings, especially for ABS and ASA are, in my opinion, wrong. But if you feel adventurous, by all means, proceed as per AI instructions… and if you do, do post your findings and some photos…We might learn a thing or two from your experience.

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That stuff is wrong on the face of it.

PLA: chamber fan off to maintain a stable temperature, but door open to improve circulation.

These are mutually exclusive goals.

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sorry for confusion.
I never wantet to take this ai stuff for real,
but it helped by creating an overview.
so please feel free to correct this chart accordig to your experiences.
for me as an newbe and may be others it might be helpful to have a basic instruktion, how to handle these points from the start.
and yes, I know some points can be handled in a different way, with even similar results…

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Welcome to AI. It’s amazing how wrong it can be while just being nicely formatted. For technical things it’s kind of a crapshoot if it even has a clue or is in the ball park. You need to be expert or at least already know the answer to be able to tell if what is so authoritatively telling you is even close.

Let’s all pray aircraft mechanics and nuclear technicians aren’t using AI in their jobs.