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How to install the 8.5 watt (8500 mw) Endurance Laser on Atomstack A5 Pro

How to install the 8.5 watt (8500 mw) Endurance Laser on Atomstack A5 Pro
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If the stock laser on your Atomstack A5 Pro died

, or you are just looking for more power, adding an 8.5W Endurance Laser is a great option. As the A5 Pro is already set up for PWM control and has a similar form factor for the laser, the conversion is very straightforward. The 8.5W laser is especially well suited for this machine, as it is very small and light which allows for fast accelerations and therefore fast engraving. As the A5 Pro is built very sturdily, you could also easily mount a 10W or 10W+ on it if you are looking for even more power. The steps will be very similar to what is shown here, just the spacing of the mounting holes is slightly different.

Atomstack A5 PRO

Adapter Plate

To mount the 8.5W laser to the existing Atomstack system you will need a mount that adapts the hole spacing. For the height adjustment, we can reuse the existing system, as it offers various mounting possibilities. All we need then is a small adapter that lets us use the different hole spacing. If your laser is still operational, you can easily cut this part from some tinted acrylic, but don’t worry it isn’t too hard to do by hand either. So the adapter sits flush, it is a good idea to use some M3 countersink screws to thread into the Endurance laser. The exact length you need depends on the thickness of your adapter, but generally, around 8-12mm will be fine. By drilling the holes for the bolts of the height adjustment plate slightly smaller, around 2.5-2.8mm you can then thread the bolts directly into the acrylic without the need for using thread cutters.

How to install the 8.5 watt (8500 mw) Endurance Laser on Atomstack A5 Pro 8.5 watt laser pro mount laser mount air nozzle Endurance laser

If you don’t have any acrylic on hand, you could also use wood or any other plastic. Also, if you are drilling the holes by hand, feel free to drill them slightly larger (except the ones where you want to thread in the bolts) so that you have a bit more room for error. This part doesn’t have to look super pretty, as long as it holds everything together sturdily.


For the electronics, the easiest way is to get the PWM signal directly from the cable that used to go to the old laser head. Doing it this way means that we don’t have to modify the original laser at all, making it super easy to revert back if you would ever want that. The wires we are interested in are the PWM signal and ground. Please refer to the picture to see which wires to use. The middle wire on the Atomstack is ground, where the ones next to it are PWM signal and positive voltage. Since the laser is being powered by the Laserbox instead of the Atomstack mainboard, we only need the PWM signal. If you are unsure which one it is, you can also check the PCB of the old laser head, the pins should be labeled on there either on the top or bottom.

PWM ground laser wiring

To connect the PWM and ground signals to the Laserbox we need a small adapter cable. The connector on the A5 Pro is a 3 pin female JST XH 2,54mm, so you can either look for a cable that already has a male JST 2.5 connector on it or solder one to a different cable. If you can’t find a cable with the connector already attached and don’t want to make your own, you can also stick some jumper wires into the connector and secure them with hot glue so they don’t fall out.

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Laser box ver 2.0 wiring GND / PMW

On the Laserbox we need the black PWM input cable, where the black wire is ground and the red one the PWM signal. You can either solder the cable directly to them, crimp on a connector, or use some screw terminals. While there is not much power going through these connections, you still want to make sure you have a good connection to ensure reliable operation.

wiring laser wiring

Finishing up

With that, you’re already there. You can turn on the Atomstack again and also plug in the power supply of the Laserbox. At this point, it is very important to wear laser safety goggles to protect your eyes when the laser turns on. To activate PWM mode, simply select the middle position on the selector switch. Lastly, you have to focus the Endurance laser, by turning it on at low power (maybe 5%) and turning the lens element until you get a perfect point focus. A trick to find the focus more easily is to use one of these black-painted metal cards. They are included with many lasers, or you can buy them very cheaply online. They let you see the laser spot more easily, and if you move them around you can hear if the laser is engraving. If you have the power set low enough, you will only hear it hissing when the laser is perfectly focused.

Endurance laser box ver 2.0 button settings

If you don’t want to focus your laser every time, you can use an object around 50mm and adjust the height of the laser so it just fits underneath the heatsink. You can then adjust the focus once and just adjust the distance after that to get the laser back in focus, just like you did with the orange acrylic piece and the stock laser head. To keep the lens from rotating by itself over time, you can use one of the extra rings that came with the Endurance laser, to jam against the heatsink and lock the lens in place.

8.5 watt Endurance PRO laser engraving


If you want to use the air assist, which is recommended if you intend on cutting wood, you can also hook that up at this point. Some good air sources would be an air pump or a hobby air compressor for airbrushing. Both of these options should be easily obtainable online from a local reseller.


An Endurance laser air nozzle: ver 1.0 / ver 2.0 (fully open-source). Make your laser cutting fast and accurate!




By following these steps you should be able to convert your Atomstack A5 Pro to using an Endurance 8.5W laser in no time. If you get stuck at any point, have another look at the pictures here, or feel free to contact us here at Endurance with the LiveChat.

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An Endurance 8.5 watt (7000/8000/8500 mw) PLUS PRO laser module 445 nm


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