This is not something we have been considering, but there are a lot of harmful fumes endangering human health in ordinary workshops. Whether it’s welding, laser cutting or 3D printing, all these processes release harmful chemicals into the air, which are best filtered for health reasons. To help build an effective filtration system, [Fab] needed some valves, so he started printing some of his own valves.
[Fab] uses a simple butterfly valve design, similar to throttle valves in most gasoline powered cars. The butterfly blades rotate to change the flow rate and are driven by a small SG90 servo. The Wemos D1 Mini is used to run a pair of valves that are paired with a Y adapter to connect the soldering station and 3D printer to the fume extraction system. As a good touch, a socket that supports WiFi is connected to the soldering iron. When it is turned on, it will notify D1 Mini and open the valve to automatically start exhausting smoke.
This is a neat system that will allow [Fab] to breathe easily in the workshop in the next few years. Those who wish to print a set of butterfly valves for themselves can use the file. We have seen other smart smoke evacuators before. Video after the break.
it’s great! I would love to build for my studio. Will such a thing be used for HVAC vent automation on a larger scale?
Do you know these are already available? 100 dollars on Granger. They can also be automated. Oh, what you can buy is galvanized steel, which will not melt or corrode
Or you can get an explosion-proof door as a switch-the dust collector or smoke evacuator will not open unless you open the door. Although this is not automatic cooling, it does require affirmative action on your safety checklist, rather than passively hoping that it will work and you will not die of smoke.
Bob, for student projects or makerspaces, this will cost about $25, and the satisfaction of making something like this is great. Yes, you can galvanize, but sometimes it’s all because I can.
It is a valve used to extract harmful fumes from processes such as resin 3D printing and welding. Usually this valve is paired with some kind of duct and fan. When you want to extract smoke, it will turn on and the fan will expel the smoke away from where people might breathe. When you are not using it, it will close, so it will not open accidentally to prevent pests from entering or losing temperature control of the air, etc.
It is also useful in a woodworking workshop environment, which can automatically open/close the explosion-proof door for dust removal when a single tool is opened.
Or, if you only have so much suction power and don¡¯t want to run a 3kW motor 24/7, in order to pump air on six machines, you can connect them all to the same plenum, and close those valves that do not operate and the valves are in Open on the valve you use.
Well, that’s why it rotates in the middle. The pressure you push on one side is the same as the pressure on the other side, which can theoretically be cancelled.
In the high school store class there is a main assembly with a dozen branches (it has been 30 years, so…) and a simple slide valve. Automatically more “cool”, students or employees may use it better. It is necessary to close the suction cup and close the valve every day, but overall it is a good system.
Hey, this is also a butterfly in German. Schmetterlingsventil may appear in my list of favorite German words.
It is a flammable valve that emits smoke. Its advantage is that it can melt or burn and disappear in a dramatic meltdown disaster.
It is always fun to automate certain things with motors, and it works well. When I installed the K40 laser cutting machine, I had to put a new hole/vent on the roof for exhaust. I installed a large hydroponic fan near the roof of the garage where I placed the ventilation holes/holes. After cutting the holes, installing the waterproofing panels and inserting the covered pipes from the outside, I noticed how much cooler my garage in the afternoon was compared to before installing the ventilation ducts that are now open.
This made me realize that I not only need a way to exhaust the smoke from my laser cutting machine, but also a way to exhaust the accumulated heat. As the project was shelved until I found a solution, I decided not to use the electromechanical actuator on the large 6-inch tee, but to let gravity and air pressure close and open the valve. The T-shaped insert containing the gravity activated flapper valve was made in OpenSCAD and published to Thingiverse:
Not what I meant… things always end up falling apart. If I hadn’t thought of the version without electronic/mechanical connectors, I would do something very similar and bolt another controller, wire, motor, etc. to the system and be responsible for maintaining it.
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Post time: Nov-10-2021
