I made this cyclone separator. It consists of five parts, four of which were 3D printed. The last, the top piece, was made out of acrylic on my CNC router so I could see inside. In my test it worked relatively well. It filters out most particles, even when tested with fine wood dust. It was designed with parameters so after opening the Fusion 360 file you can easily change the various dimensions.
I have recently migrated from Thingiverse and Thangs over to Printables: https://www.printables.com/de/model/399503-cyclone-seperator
0:00 Why build one?
0:44 How do they work?
1:21 first design
3:33 second design
3:49 Assembling the cyclone
7:55 Testing
10:35 Outro