As I started to use my Dremel CNC more often I noticed that after milling wood and MDF there is a lot of thin dust everywhere around. I also faced a problem with aluminum chips that got stuck in a lead screw, so I added a cover for the lead screws but I knew that the best solution would be attaching a vacuum cleaner to the machine. I have a really big and loud workshop vacuum cleaner that is way too powerful for this task. While I was scrolling through posts in Dremel CNC builders group on Facebook I noticed Jan's post about his 3D printed vacuum cleaner. I thought that it's a really cool idea to build a small vacuum cleaner that I can put next to my CNC machine and keep it on all the time when CNC is milling. So I opened Fusion 360 at 1 AM and 2 hours later my very own 3D printed vacuum cleaner was ready to be printed. Before you will start reading this instructable you have to know that this was more of like an experiment than a project, I had no idea if it will work, I just did a quick research on the internet to find out how cyclonic separation works and how vacuum cleaner turbine looks like. But I have to say that this project exceeded my expectations a lot!
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Step 1: Watch the Video!
Step 2: Parts
For this project we need a few 3D printed parts, it should take about 12 hours to print all of them. The gasket should be printed with flexible filament, but this part is optional, for sure it improves the project but you can also build it without a gasket. Hose holder is especially designed for the Dremel CNC and a hose with an external diameter of 22 mm. As a hose I used something called corrugated pipe, it works great and is very inexpensive. Here is what else we will need:
Step 3: Assembly
Firstly fix the 775 motor to 3D printed part with two M4 screws. Then press the turbine to the shaft of the motor, you may need to sand hole for the shaft a little bit. Generally, we want to have a tight press fit here to keep the turbine secured on the shaft. Put in place M3 screws like so and then put a gasket in place. Close that with big 3D printed part and screw down with nuts. Assembly of this project takes like 5 minutes it's really simple. Make sure to squeeze the gasket with screws a little bit.
Step 4: Dust Box
The best and least expensive way to make a dust box for this project is to use a hermetic food container. We need to drill a 45mm hole in the top of the box. Be carefull it's easy to brake this thin plastic. To drill this hole I used this thing that you can see on the images, I have no idea what's the name of it, but it works kind of fine for such big holes in thin materials. Once the hole is ready you can mount it on the vacuum cleaner with a 3D printed nut.
Step 5: Hose
As the hose I used a corrugated pipe, it's crazy cheap and works fine for such project. There is one small downside because it is corrugated it makes weird sounds while air travels through it, that's not a big deal, sometimes it even sound kind of funny but after few hours it may irritate. The internal diameter of this hose is 18mm and external diameter is 22mm so if you have any other hose with the same diameters you can easily use it with this project.
Step 6: Power Supply
Initially, as the power supply I used my lab bench power supply to control the voltage and speed of the motor, I was afraid that because of the vibration this turbine will blow up. Once I tested everything and it was fine I soldered a DC connector and now I use 12V power supply to power this motor. What's cool about this project is that you can actually power it with a 12V batter, 3S lipo battery or even car power outlet.
Step 7: CNC Attachment
To attach the hose the Dremel CNC I designed a very simple mount that you can easily attach to Dremel CNC without any modifications. It takes about 30 minutes to print it. You have to take out Dremel in order to put this in place, then put Dremel back in and it will hold the hose perfectly. Make sure that during milling hose wouldn't touch your material because that can jam the CNC. You can easily design any other attachment of the hose to your CNC machine or any other tool.
Step 8: Conclusion
As I said this project exceeded my expectations a lot. It not only works as vacuum cleaner, it's is quite powerful for such small thing. And it is super easy to build, you can even use it as a small vacum cleaner to clean your workbench or desk. I hope you enjoyed this project! Let me know what you think in the comments!