LASER cutting on a cheap and cheerful CNC machine is lots of fun, but I can’t say the same about the smoke and fumes. That’s why I posted before about a simple extraction system. But since then I decided to try to do better using a larger fan mounted on the CNC’s 2020-extrusion frame. So I used OpenSCAD to make a design based around an Arctic Air 80x80x25mm PC fan, as it’s designed for higher airflow than cheaper fans. You can see the result in the photo below.
The design did quite a good job and the air flow-rate was quite impressive in my opinion. However, it has the disadvantage of covering a large area so the suction around the LASER-cutting area turned out less than for my previous design. So I decided to adapt the design to allow the fan housing to be mounted to a simple enclosure I’m prototyping for my machine. That led to me adding side supports that stick to the housing and have flanges with holes for bolts.
Using the fan with the enclosure works really well, with hardly any smell of smoke or fumes coming out while LASER-ing, as it’s all blown through a flexible 60mm hose out through a nearby window. You can see the side supports in the 3D assembly picture below. And, if you’d like to have a go at making your own extractor fan from this design, click here to go the Thingiverse page which includes all the STL files and the OpenSCAD design file too.