I am looking to extract toxic fumes from my X1 Carbon machine. I have seen quite a few mods to get some ideas before embarking on mine. Honestly I have been put off work and decided to give this, the utmost priority before continuing my other 3d print projects.
I have in mind to attach a fixture at the rear of the perforated back and then introduce a separate blower fan to suck out the fumes and evacuate the fumes out of the room. That would have done the job, however I have noticed something else. I took a small pad paper against the fan because I did not notice any appreciable blow out and at some point the paper seemed to be sucked towards the fan.
Does this really blow OUT ? and would sucking the air out, cause outside air to enter the print chamber to replace the air pulled out? I am working on also putting in a chamber heater.
I would appreciate if someone cares to explain how the Bambu ventilation systems work.
I print ASA on my SV06. Instead of trying to build something that goes out a window, I went with a Bento Box. Right now it’s just as cheap to buy it then build it yourself.
I am sure it is supposed to blow air out… but I had a similar, inconclusive, experience with a paper like that when I was pushing the exhaust air through an external HEPA filter in a magnetically attached frame sitting on the outside. After I replaced that contraption with a small internal HEPA filter right above the original activated carbon filter, I get the impression it flows a whole lot better and a paper definitely doesn’t stick now. For some time I assumed that our exhaust fan is simply more powerful at sucking air through a restriction than blowing through one, but when I recently asked ChatGPT about it, the answer was that the difference is generally slim.
Anyway, I have no objective proof. I am toying with the idea to source an air flow meter, or build one out of a readily available car MAP sensor, because I have other uses for such a thing anyway.
A fan sacrifices power when it has to transport air through a restriction. the airflow becomes faster due to the restriction, but there is additional turbulence and the fan has to do more work, so the power consumption increases. and although the airflow is accelerated and concentrated on a smaller area, the amount of air transported per second decreases.
There is only a difference in the direction of rotation. some motors are designed in such a way that there is a preferred direction of rotation. the fan can then be slower or work less efficiently in the opposite direction to the preferred direction of rotation.
A smaller internal HEPA filter placed directly above the original activated carbon filter (as opposed to an externally mounted filter that can subsequently obstruct the airflow) could offer less resistance and therefore result in better airflow. If the filters are placed seamlessly one behind the other, the path that the air has to travel through is more direct and easier, which can lead to less turbulence and a more efficient airflow.