Ortur Laser Master Air Support Unit / Bundle

thingiverse

After downloading and printing numerous "possible" air support units for our Scuola++ laser cutter, I decided to create my best one, perfectly compatible with our new Ortur Laser Master 20W. Please note that other laser diodes (7W, 15W) may not be compatible due to different physical and laser characteristics. The LU20W diode works optimally at a focal distance range between 30 to 40mm from the laser base to the object (LU7W is 80-100, LU15W is 70-80mm). For my original 15W unit that I modified and upgraded, please refer to my friend Brian Dragtstra's website. The idea is that during engraving or cutting materials with the Ortur Laser Master 20, smoke is created and this smoke enters between the material to be cut and the light source, reducing the laser power by up to 70%. An Air Assist system provides a continuous flow of air that 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. Furthermore, far less material burns will be visible, producing better quality prints. A small radial fan (model "5015", easily purchased and inexpensive) blows air below the laser beam through the 3D printed unit. 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 like it obstructs airflow, but it does 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 (see the pictures). The electricity used can be taken from the power supply of the machine. In my case, I soldered a jumper on the top of the laser diode tower (see the photos), so to take the same 12V power that reaches the existing laser LED fan and use for the new fan as well (absorbed power is very low). This way, the fan only works when the original laser fan runs as well, which is probably the best option. Using the jumper "trick," I can easily detach or substitute the new fan from the air unit. Remember to put the spacer, as shown in the photo, so that the machine can correctly initialize the (0, 0) position with the head touching the end-run pin. Otherwise, the head on the Y axis would keep moving against the X axis. Here is a list of what you need to print and buy: * PRINT + Air support unit, with fan interface + Laser diode cap, with nice Ortur logo, to better manage the rubber bands + Little spacer (you can use any object sized 10x10x3mm) * BUY + A "5015" 50x50x15 12V coaxial brushless fan, easily ordered on Gearbest or Amazon: - [Gearbest link](https://www.gearbest.com/printer-parts/pp_009131324465.html?wid=1433363&lkid=78857285) - [Amazon link](https://www.amazon.it/gp/product/B07G2SY71R/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) + Eventually a Dupont crimper and jumpers to ease the fan attachment to the laser power (you need to know how to solder). You can buy a set on Amazon: - [Amazon link](https://www.amazon.it/gp/product/B07QV4GKF8/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1)