1.0 bar

Il regolatore è regolabile ed è calibrato in superficie per chiudersi appena, il che equivale a circa 0,6-0,9 bar, a seconda della pompa.

Hai pensato di aggiungere un regolatore di pressione per staccare il motore?

@@ciaociao6614 Con questo tipo di compressore, non sarebbe molto utile.

Zwei Filter wäre absoluter Overkill und kostet nur Leistung, einer reicht vollkommen. Wir arbeiten hier mit wesentlich geringerem Druck als bei konventionellen Pressluftgeräten nach der 1. Stufe. Jeder Filter bedeutet Druckabfall. Kondenz ist bei dem geringen Druck auch kein Thema. Vor und nach Benutzung ca. eine halbe Minute durchblasen lassen, damit mögliche Feuchtigkeit beseitigt wird und das Thema hat sich erledigt.

@@e-mat6077 Vielen Dank, das hört sich gut an. Welchen Filter nutzt du?

You mean the pressurized floating ring? It´s ventilation pipe and 90 degree corner pieces. The hose connections are attached with brass fittings.

@@e-mat6077 thanks! I’m guessing there is a special fitting class - here in Canada, our fittings fit ‘over’ the pipe ends… leaving a ridge ~3mm. Your joints seem to be flush. Do you have a link you could share?

@@en2oh Here´s a link where you can see what it looks like: www.biltema.fi/en-fi/construction/hvac/ventilation/ventilation-systems/ventilation-system-125-mm-plast/elbow-90-o125-mm-2000050801

@@e-mat6077 ah, the vent pipes! I think they have virtually no pressure handling capacity- at least the straight pipe. What has your experience been? What is your relief valve set at?

@@en2oh The pressure release is triggered at 1 bar, which this compressor can barely reach. You need to keep in mind that this kind of compressor is designed for high volume output, not high pressure like for example a tire inflator. I did a separate stress test, filling the reservoir to 3 bars (using a different pump) without any issues, so there´s plenty of safety margin. It could probably stand a lot more, but I didn´t want to break it just to find out how much more.

@ E- Mat

@@maxiheck8596 Hallo Max! Danke für Dein Feedback. Ich habe jetzt zumindest neue Links für die ACQ-Kompressoren, Atemregler, Überdruckventil (1 kg/bar) und Flagge gefunden, den Rest muss ich noch suchen. Für den Kompressor ist ACQ-903 das absolute Minimum, der ist zwar schön leicht und kompakt, aber ich würde nach Möglichkeit eher den 906 oder 908 empfehlen. Viel Spass beim Basteln und gut Luft! :)

@@e-mat6077 hey vielen Dank für die schnelle und umfangreiche Antwort Weißt du ob der spiralschlauch Lebensmittelecht ist ? Lg Max

@@maxiheck8596 Darüber habe ich leider keine 100% Gewissheit, aber der Schlauch hat keinerlei Gerüche oder sonstige Anzeichen. Ich habe ihn noch vor Gebrauch eine Weile in eine Spülmittellösung gelegt und dann gründlich und mit Druck ausgespült mittels Gartenschlauch-Anschluss.

1. Probably not. This is for standard 5x7 holders 2. No, I recommend a suitable dark cloth 3. Whatever gives you the best results. I used PLA. ABS would also work if you manage to print it without warping issues.

@@e-mat6077 Thank you. If you have an opportunity to measure, I'd be interested in a confirmation of what maximum thickness of filmholders your design can accept. There is a standard only for the outer dimensions of 5x7"/13x18cm filmholders - but Fidelity, ANSCO, Kodak filmholders are all different in thickness.

@@e-mat6077 Is it possible to modify your 3d design in order to allow accepting holders that are 22mm thick?

@@nicholasmikalajpackajeu3250 If the outer dimensions are otherwise identical, then you might only need to scale up the z-axis of the 5x7 base part, screen frame and pressure plate by the same percentage that your holder is higher than a standard one.

@@e-mat6077 Yes, all the modern 13x18cm, 5x7, and half-plate Graflok-type holders have identical outer dimensions, albeit different thickness.

It depends on many variables like temperature and resistance. The deeper you go, the more resistance, the higher the current draw. It´s always better to be on the safe side. You need to do your own research and then add a sufficient safety margin. Even though Lipos have great capacity, they are not the safest option because their BMS will automatically cut off the power once the minimum voltage is reached, so you need to stay aware of your battery status at all times.

With this compressor (ACQ-903) maximum about 1 bar.

The compressor you mentioned is very different from the one I used. The Einhell uses much higher pressure, but relatively low volume, so you would need to use a regulator with higher intermediate pressure setting. Also, I have no information about the internal structure of the compressor, so I cannot say whether the air it produces is clean enough (free of oil and particles) for breathing. If it uses pistons instead of membranes you need to expect some debris. You really need to do your own research.

Perfecto gracias

Hi, thanks for your question. This was my personal proof-of-concept project and it works very well. And thanks for asking, I´m still very much alive. The 3d-files that I made are by no means on a fool-proof or plug-and-play level. Without solid background knowledge on diving safety and sufficient technical understanding, they wouldn´t be safe to use. Of course, there are also many people here who would posess the necessary know-how to build and use it safely - but there are also some others that don´t. If I made the plans public, I´d have no way of making sure that whoever decides to use them also has the necessary skills and knowledge to do it safely. There is a risk that someone might use the plans who really shouldn´t. If you go through this comment section, you will notice that some of the comments and questions here clearly indicate that there are also people interested in this project who lack even the most basic knowledge necessary to use such a device safely. I understand that this might be frustrating for those who could find the plans useful and would use them responsibly. On the other hand, those who do have the necessary knowledge and skills might find this info useful for making their own construction, even without any of my plans. After all, it´s a relatively simple device, but you have to understand what you are doing and be aware of all potential risks.

What would make you think that I didn´t?

@@e-mat6077 I know nothing about you

I enjoy being alive way too much that I would take any unnecessary risks.

No mold whatsoever. I live in a dry climate and always vent it thoroughly after use, store it indoors in a dry heated space and leave the hose connection open until the next use.

You can adjust it to fit the pressure of your compressor. Adjust it until it closes at exactly the maximum pressure that your compressor produces. No air is supposed to flow unless you inhale. I also changed the hose on the regulator for a wider one with 10mm inner diameter. It will improve breathing characteristics.

Hi, the sizes are 100% correct. Just make sure your slicer is set to metric and that the slicing software is correctly configured. I used Cura to print mine and as you can see on the video, it´s way less than 2 meters in size... ;)

As the description says - to 5 meters.

More details and info are visible at the thingiverse link which is in the description.

Sorry, you need to do your own research then. You´ll also need to take other issues into account like avoiding exhaust gasses from entering the system.

The exhaust fumes are easy lol I'm just looking for a cheap compressor to use

You need to look at the curves which show how much output in liters you will get at what pressure. For example, at 5 meters the compressor needs to overcome 0.5 bar of pressure, at 10 meters, it will be 1 bar. At the same time, the volume of the air that the compressor is able to supply, will be reduced by 1/3 at 5 meters and by half at 10 meters due to the surrounding pressure. One diver needs about 15-20 Liters of air (at depth) per minute, depending on physical activity and individual properties. So as an example, if you want to dive to 10 meters, it means that you would want a compressor that is able to supply 40 liters per minute against a pressure of 1 bar. By the time the air is pumped down to 10 meters, its volume will be reduced by half, so the diver will have 20 liters to breathe per minute. 160L/min might make it possible for you to supply two divers at the same time when at shallower depths. With only one diver, you will be able to go a bit deeper, but not not much more than with the smaller compressor. I can´t give you any precise calculations without seeing the exact specs and curves, but my guess is around 7-8 meters. A buffer tank is an absolute necessity. Without one, breathing comfort will be a lot worse and maximum diving depth will be greatly reduced.

@@e-mat6077 how did you connect te airtank? Directly to the pump?

​@@koenmastbergen9216 The floating ring serves as a buffer tank. The compressor is pumping air directly into the floating ring and the long regulator hose is connected to the bottom of the floating ring.

@@e-mat6077 smart and thanks for te tips!!! I dont have a 3d printer so Il probably make something out of pvc pipes those can probable handle that low pressure.

@@e-mat6077 I dunno man. I made one of these using a diaphragm pump the biggest one I could find. Had a max pressure of about 17-18psi flow 160lpm, put a reserve tank and found I was using up all the air and had to breath shallow. Iv since change to a piston pump that flows 300lpm, set pressure on 20psi off 50psi. Pump runs for 15 seconds every minute to keep up and it's so much more enjoyable. Maybe I have a bad pump but the thing couldn't keep up and I don't like chewing threw the battery having it running none stop

The files are still at a prototype stage, so there are some details which are not 100% optimized. I haven´t had much time to work on this project lately due to what´s going on in the world right now. The files could be used, but they are definitely not plug-and-play.

How about reading the description?

How long do you think that battery would last with the stronger compressor m.aliexpress.com/item/1852612738.html?trace=wwwdetail2mobilesitedetail&aff_platform=link-c-tool&sk=gfBg98U&aff_trace_key=2b3ad2a3ad7246a5a38f347a79f00997-1592242808484-02992-gfBg98U&terminal_id=086b29189c1348efa18e6c1f7a164b94&aff_request_id=2b3ad2a3ad7246a5a38f347a79f00997-1592242808484-02992-gfBg98U

@@theartist8189 With the same kind of battery about 1 hour.