What does a laser owner want most? A more powerful laser! But I'll you sure that a more powerful laser is also a better laser. Hi mate and welcome to my garage. In this video I will tell you some things that only experts know about laser dial for laser engraving. And clarify some myths such as what about the real power of laser dial? Are Chinese laser reliable or not? Is a more powerful laser a better laser? 40 watt laser? Is it a scam? Can metal be engraved with a laser dial? And do I really need a assist? The herald offering engraver is the laser model, which is made of four parts. Diet, lens, head sink and driver. A laser dial is a small electronic component that is not intended to be used in an engraved process. In fact, if we read the technical sheet of laser dial we will never find laser engraving in its application. But it doesn't know and so he engraved the same. What about the real power of a laser dial? We can find laser module up to 40 watt. But the most powerful dial in visible wavelength is only 7 watt. Therefore, this is because cellar has marked and tried to attract the buyer with either power and lower price. This in pay lying about through power. The true power is the optical output from the laser. The one declared by the laser is the electrical input power that includes conversion losses due to driver efficiency, power loss in it and often also the current used to power the crew infan. Our Chinese laser reliable or not? Well, it's like asking if pizza outside Italy is good or not. Definitely, most pizza outside Italy is of poor quality. But lucky, we can find good pizza, haven't had Italy as well as we can find bad pizza in Italy. Most laser modules haven't those you find on eBay or Amazon, even from European store are made in China. An exception is a couple of shop from the United States, DTRLPF which sell all his pay apart and Barnett unlimited. What are very reliable? And the last same guy who is doing a great job in producing high quality modules. Cold and Durant laser. However, they only sell laser module and do not sell until engraver. So, here are some suggestions to not get scammed when buying engraver or module. First, don't trust an anonymous seller and try to understand if the brand corresponds to a real company to a unique and original product or it's simply a copy of someone's design. For example, Hortu, Atomstak, Nige, they have a unique design copied by many anonymous competitors. The difference is that a brand try to sell reliable product because if it's product or pool, its brand will be runeid and no longer sell. An anonymous product don't give you the same warranty. Second, check for after-sale support. Search the internet and see if you can find a forum, a Facebook page, a site, an email address on which the manufacturer can be contacted and provide assistance. The diaries module can break, they can be fake or you may simply not understand how to use them. After sale, assistant is fundamental. Third, do not trust who does not tell you the optical power. Hortu said also the clear optical power of the diaries, not only electrical power. Fourth, do not trust to high power and to low cost. There is something wrong with this. His more powerful laser, a better laser, the way a laser engraver works is by concentrating the light in a really small dot. It's a light tell like when you use the magnified lens with the sun. Small less is the dot, more powerful is the engraving. Here is where the section is. A laser dial without a focusing lens would not produce a point by its natural. He would make a bar. Higger is the laser power, widest is the bar. In technical we call this issue divergence. This means that i-power laser dials are more difficult to focus into spot. This is a comparison test between the trees left by 7 bath, 15 bath and 20 bath laser from Hortu and 20 bath from Hortu Stack, on a piece of along dialed aluminum. As you can see, the tree is left by the 20 bath diode is asymmetric. Exactly because the rectangular component of this beam is very strong. By misroute side, using image pixel as reference, we can now compute the real power density as vat per millimeter square. Let's enlarge image and calculate the size of the spot. So here is the result. We can think of power density as the equivalent of the tip of a needle to the tip of a nail. Heated with a lighter, even with less flame, a needle is much more hot than a nail. To answer the Nistel question, is a more powerful model, a better model? It depends on the use you have to do. If you want to make very peaches and thin engraving, a lower power model is better because of the smaller bone. For example, this cardboard is engraved with 7 bath model, which is 1.6 bath optical. You cannot absolutely obtain a result so sharp with an eye-power laser. But if you need to cut or deep engraved resistant material, you need much more row power. So it's better for you to buy a more powerful model. My personal opinion is that a 50-byte model is a good compromise of row power, spot size, and power density. You can find some link to model and then wherever I use for this video, here in the description. 4D Bat laser model, is it scam? I not have yet the opportunity to try one of these models like the Niger 40 bath. I am very suspicious of this declared power, because as we have seen, the most powerful dialed 7 bath, which can correspond to 25, 30 bath, but not certainly not 40. If you have one of these models, please write me your impression in the comment. I would be happy to make a comparison video if Niger want to send me one of these models. Can metal be engraved with a laser dial? The answer is no. If your reason for purchasing a laser engraver is to engrave metal, a diode engraver is not what you need to buy. You need a fiber engraver, which costs a little more. But you can engrave and the dies at aluminum, going to remove the anodized surface layer, how I did in this video. If you search YouTube, you will find someone who engraves steel with laser dialed. Yes, it is possible, but it's not easy and it's not what these engravers are designed for. Do I really need irassist? I want to answer with a simple video. Here you see two identical engraver with the same 20 bath laser model. On one of them, I've mounted a homemade irassist system. The cut made with irassist is faster, cleaner and can go deep. I've been able to cut plywood up to 10 mL. You don't need a professional irassist system. Even a simple light pump with a straw, it can do it for you. I built mine with an aquarium, I had pump and a straw for about 40$. I used a model HighLaya ACO318 and worked fine. You can find it on Amazon. I get mine from ILEXpress because it was cheaper. You can find the link of the pump below in the description. And that's all. To stay up to date on new videos and a resort deep, subscribe to the channel and activate notifications.