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I built a DIY open-frame laser engraver, and decided to use the Comgrow 10W optical power module. (I believe this is the same module used for the Comgo Z1.) The price of this module is very reasonable for a 10W module, but there weren't many people using it by itself, so I knew it was going to be a bit of an uphill battle to get things working properly.First, the package includes only the laser module, safety glasses, and a metal mount, as shown in the product photo. The package did not include any kind of power or PWM cables, or documentation. Fortunately, I already had JST-XH connectors, pins, and a crimper, so I had no problem making my own cables, but I’m sure including a couple of pre-wired JST-XH pigtails would be appreciated by customers.Regarding the lack of documentation, the Comgrow web site wasn’t super helpful. Of course, part of getting this module working is dependent on the specific controller board and firmware, but competitors such as NEJE at least have example wiring diagrams for different situations. What is confusing is that in one video, they show hooking it up to an Ender 3 controller board, and just running the Ender’s fan wires to the laser module power, with no PWM hookup. A different video shows hooking up to a CNC with both power and PWM.In any case, I eventually figured out how to wire things up for my specific setup, which is a FYSTEC E4 controller board, running FluidNC, using both power and PWM. But again, I ran into a situation where it would have been nice to have more documentation, and that is what frequency to use for PWM. At the moment I have it configured for 1000hz, which works well. I contacted Comgrow through their Facebook channel, and they responded that the laser can handle 100hz to 10khz, so I might try different frequencies to see if it gives me different results.The other place where we need better documentation is for setting the laser focus. This information is available, but isn’t where I would have expected it: the focal length of the 10W laser is 45mm, and since the laser shield is 38mm tall, that means that the shield should be 7mm above the workpiece. I decided to 3D-print a 7mm block to make focusing easier.I haven’t used the module that much yet, just run a couple of test grids, but now that I have everything configured, I can say that it works well so far. I even designed a 3D-printed air assist that works with the existing laser shield. (There are a couple other designs that replace the shield.) Overall, this is a good module and a good value, but adding pigtails and documentation would make it even better.1. This is a nice little laser and packs some decent power. I purchased the five watt version for use with my ender 3 V2. However the implementation out of the box as an add-on for a the 3D printer is not great. The way it is wired into the ender 3 v2 (and other printers I assume), does not allow for pwm variation of the laser intensity. It's either 100% on or off.2. There was an undocumented delay between the time the laser-on command (M106 S255) is issued and when the laser actually turns on. Seems like around 350 ms or so. I had to edit my G-Code to compensate for this by adding 350 ms delay prior to every M106 command.3. If you plan to use this for cutting stuff, it's pretty good out of the box for that purpose, but if you are planning to do some detail engraving work, I would recommend also buying the universal laser control box sold by comgrow. That control box has a totally separate power supply and printer contol board that plugs into your existing Ender stepper motors, and it will allow you to vary the laser intensity via pwm using LaserGRBL or similar software. The universal laser control box basically lets you run your laser on an Ender printer without having to modify anything inside. Nice because you don't have to fiddle with the internal wiring to switch back and forth between 3D printing and engraving. I couldn't find it on Amazon but it is available on the comgrow.com website for $50.I'm using this for a custom CNC router/etcher/cutter and it works great. Dropping 1 star because it likes to jump on at full power when the PWM is left floating (which happened during machine powerup, burning a nice spot if anything was left under it).is a good laser, and does a better job than the 5W oneI built a DIY Laser. Unable to to an Larger one already build. I also own a K40.The 5 watt laser has a lot more power and is much Nicer and Larger than the previous one I owned from Comgrow as you can see in the pic. It came with Safety glasses and the mount and wires to hook up to many different printers. But I bought it for my DIY Project Laser. I run Lightburn and it worked great, It sits very close to my work and with the protective shield around laser is very nice. Always wear safety glasses when using a laser and never leave un attended. The control board I have it hooked up to failed after test printing with it all day. I hooked up the smaller, older laser once this happened which worked fine before and it also would not test fire. So I need to buy a better control board for it. This 5 watt laser has a Cooling fan mounted on top of the laser to keep it cool and is fixed focused. Your focal length needs to be 22 mm from your work. So from the top of the red acrylic to my work I have a small piece of plastic to get the correct distance. In the past I was never able to get there software to work correctly with my Ender 3, maybe its different now, I don't know. But as I said about I use Lightburn and this 5 watt laser is mounted on my DIY Laser Project and seems to work fine. I have a Group and Channel called 3DHP. I will have a video put up soon on this Laser. I hope this might of helped some of you wondering about this laser head. Oh, also it you hook this up to a 3d printer, they have included a plug that is a Y to hook up to fan port and with between plugs outside of printer, so no need to open up control box over and over to switch over. I would recommend this laser for a DIY Project and Buy Lightburn to go along with it.Added this laser to my DIY 3D printer and it exceeded my expectations. I use it primarily to etch PCB boards. It works great with a lot of other materials as well.El producto es exactamente como se describe. Por mi parte ya lo he probado y funciona perfectamente. Satisfecho por la compra.I love Comgrow and their products 5 stars all around!I have the 5w upgrading to 10w, double the strength double the fun!
