I got a new CNC and I made a simple spindle dust hood

I have bought a mini desktop CNC. I need this CNC because I have sold the big cnc I had and planning to put an air purifier business but to make 1 air purifier, I would need a casing and to make a casing, I need laser cutting services which is very expensive so if I have my own small cnc, I could bring the price so low that I could beat the branded air purifiers not just in terms of very effective air cleaning but the pricing as well.

Ok, that solves my problem, and yes it can cut acrylic, but to use it, requires devices and add-ons to protect the cnc itself and prevent dust from flying all over my tiny place, that's why I came up with the idea of creating at least a dust hood for the spindle.

All the dusts and forces that makes the scatter and fly over the place is at the spindle, so having a dust hood at this area of cnc can help solve the problem by 90 to 100% .

Here is the cnc with my old raspberry pi 2:

My original plan was to use the cnc with the raspberry pi 2 and make a casing similar to this:

but the raspberry pi was very slow in transmitting gcode to the cnc so I scrapped the idea.

I started the project(making a dust hood for the spindle) last Sunday, and I was able successfully created a simple dust hood which is like below:

It passed all my tests, it can prevent dusts from flying and scattering all over the place. Efficiency is at 85% but installing and uninstalling is not easy and very inconvenient, so I separated the attachment and brush holder and went to a nearby machine to have them tapped and the result was awesome but very expensive. The machinist charged me Php800 but I haggled until we agreed at Ph600 which is still very expensive.




Here is the much closer look the new dust hood:

New Air Purifier Designs and with Extensions

It has been over a month since my last post and during that span of time, I have made several iterations in the design and I even made an industrial class version but it failed because I am trying to copy what others are doing(currently available air purifiers in the market). But I will tell the reason why it failed at last part of this post.

The iterations I made so far and it seems the final version already is that I made it smaller, I used lower powered but bigger cpu fan. I like the bigger fan because it has bigger blades and with bigger blades, it can suck in air more easily on a wider area, I sacrificed the higher power to get rid of the noise. And the last revision I made is to glue all parts except the door for changing the filters and removing the bag of activated carbon. I also got rid of using multi-filters because those unnecessary filters were useless, I found this out during my testing of the industrial grade air filter I made. So now, I only use hepa filters. These filters can remove particulates in the air even those PM2.5 class particulates where harmful chemicals and air borne viruses and bacteria belongs.

I also added a third motor which can be detached from the fan when not needed. This third motor will allow the air purifier to catch more air as far as 3 meters so that means the space that it can help clean was widened from a mere 18sqm to about 25-30sqm.

Here is the new air purifier:

Here is the extension module:

Here is the industrial grade air purifier:

The design failed because of only 1 reason: it does not have enough activated carbon in it and most of the air wont pass through the activated carbon. It is also very expensive.

My original design was very effective at removing air particulates and odors because the air has to go through a very thick layer of activated carbon which is about 50mm thick and there is a chamber where the air goes and will not have a choice but to go up and pass through the activated carbon.