Flattening The Exhaust Of A Laser Cutter To Save Space

April 14, 2026 by Maya Posch 9 Comments

From laser cutters to 3D printers, having an exhaust duct at the back of a machine is a very common sight. However, these tend to be rather bulky, claiming many centimeters of precious space behind a machine even if you’d want to push it right up against a wall. This issue annoyed [TheNeedleStacker] over on YouTube so much that he had a poke at solving this problem with angled exhaust ducts, all hopefully without impairing its basic function.

Smoke machine and laser for some air ducting rave vibes. (Credit: TheNeedleStacker, YouTube) — Smoke machine and laser for some air ducting rave vibes.

Although there are some online offerings for angled exhaust port extenders, these do not quite fit the required 6″ diameter. Reducing the problem to just a matter of cross section area for simplicity’s sake, that means a 19″ wide duct at a depth of 1.5″. Making sure the transition from the tube to the flat duct doesn’t become an impediment is the tricky part, so the approach here was to mostly ignore it and just make a functional prototype to get an idea of how a direct approach worked.

Installing the contraption worked out fine, and subsequent testing showed that although it seems to slightly reduce the effective airflow compared to the flex tubing, it is absolutely rad to look at with the transparent cover and some laser light to illuminate all that’s happening inside.

While some optimization work on the duct transitions can undoubtedly eke out more performance, it’s certainly not bad for a quick project.

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All The Air Ducting Parts You Could Ever Need

August 4, 2024 by Jenny List 49 Comments

If you have ever planned an air duct or dust extraction system for your shop, you’ll know just how difficult it can be to accommodate all but the simplest of arrangements. Off the shelf systems are intended for use in home heating or other domestic systems, and offer little flexibility of choice. Of course you could 3D print an adapter or two, but [Fabian] has taken it to the next level with a comprehensive library of 3D-printable pipe system adapters and accessories. We’re not sure we’ve seen such a complete collection.

The pipes are mostly at 125 mm diameter, with the full array of elbows and joints, alongside adapters for fans and smaller pipes, and different splitter options. It becomes particularly interesting in the accessories department though, because he’s also made a set of smart addons, packing ESP32s for sensors, and even valves.

It sometimes shocks us to go into hackerspaces and see nothing in the way of extraction around tools that really need it. Airborne smoke and particulates are a proven hazard, and thus we like this project a lot. If you don’t have adequate ventilation or extraction on your bench, consider printing yourself a solution. Take a look at how one hackerspace did it.