The Air Assist add-on on the Ortur Master 15 laser, is an addition that allows the laser to engrave or cut with more power. The operation is very simple, which is why it is a pity that air assist is not standard on the Ortur laser Master 15.
The idea is that during engraving or cutting materials with the Ortur Laser Master 15, smoke is created and this smoke enters between the material to be cut and the light source, so that the light no longer 100% reaches on the surface to be cut. If the smoke is very thick, up to 70% of the light beam can be absorbed into the smoke, reducing the laser power by 70%.
An Air Assis system provides a continuous flow of air that, like the laser, radiates perpendicularly downwards, blowing smoke aside instead of rising straight up. As a result, no smoke is released into the light beam, and the laser retains its full power.
The Air Assist I designed, is placed in front of the laser unit itself. A small radial fan that is deflected by the 3d printed unit, directly blows air below the laser beam. Because the beam must enter the head from above, there is also a small hole at the top, through which the light can enter. This hole looks as if it obstructs the airflow, but it is not. A small amount of air leakage on this side is even desirable, so that smoke that rises above the head is also blown away. This keeps the entire light path of the laser free from smoke.
Another important detail of this design is that space has been kept for the user to focus the laser. The 3D printed unit is held in place with rubber bands. The electricity used is taken from the power supply of the machine.
For instructions to build this yourself, see the video that I made.
You can easily print the Air Assist Unit yourself, provided you have a well-calibrated 3D printer. The printer must be able to print overhang at an angle of 62 degrees without the need for support.
- Print the unit UPSIDE DOWN
- Print with PLA, ABS, NGEN or PETG. Choose a clear material (*)
- Use a 0.4mm Nozzle, then you have 3 perimeters.
- 4 top and 4 bottom layers.
- 4 Perimeters(shell).
- 20% infill.
- Support YES, but from printer bed only.
- Print slow, like 30mm/sec.
If you are not able to print the file yourself, ask a friend, co-worker or maker space to make it for you. I don’t have the time to print and ship parts. Sorry. Also, if the part doesn’t fit your laser machine, I can’t help you. It’s designed for, and tested on the Ortur Laser Master 15. With my work I don’t have time to make personal versions that will fit other machines.
(*) If you choose a clear material, such as clear PLA, you can see it immediately if the Air Assist is not perfectly mounted under the laser. If the laser hits the Air Assist at low power, it will light up completely.
Don’t forget to buy a fan
For this Air Assist you will also need a 12V 50x50x15 coaxial brushless fan.
Gearbest only sells them per 2, if you can find them elsewhere per piece, do that.
What? Wait…., you haven’t got a laser yet?
Quickly, buy the Ortur Laser Master 2 before they stop making it: https://www.gearbest.com/laser-engraving-machine/pp_009731781853.html?wid=1349303&lkid=78535081
Now there is also a MUCH bigger machine on sale, check it out here: https://www.gearbest.com/laser-engraving-machine/pp_009734158273.html?wid=1433363&lkid=78723375