Laser cutting is a precise and efficient method for cutting a wide range of materials, including wood, metal, and plastic. However, one of the downsides of laser cutting is that it can often result in burnt or singed edges on the material being cut. This can be unsightly and can also weaken the structural integrity of the material. In this blog post, we will discuss some techniques and tips for avoiding burnt edges when laser cutting.
First and foremost, it is important to choose the right laser cutting settings for the material being cut. This includes the laser power, cutting speed, and focus. Lowering the laser power or increasing the cutting speed can help to reduce the amount of heat that is generated during the cutting process, which can in turn reduce the likelihood of burnt edges. Additionally, adjusting the focus of the laser beam can also help to reduce the amount of heat that is generated. A proper focus will create a smaller, more intense beam that will cut faster and more precise, reducing the heat generated.
Another important factor to consider is the type of material being cut. Some materials, such as wood and plastic, are more susceptible to burnt edges than others, such as metal. When cutting these types of materials, it is important to use a lower laser power and a higher cutting speed to reduce the amount of heat generated.
It is also important to properly maintain the laser cutter itself. This includes keeping the lens clean, properly aligning the laser beam, and ensuring that the cooling system is functioning properly. A well-maintained laser cutter will be able to cut more efficiently and will also generate less heat, which can help to reduce the likelihood of burnt edges.
Additionally, using a fume extractor can help to reduce the amount of heat generated during the cutting process by removing the fumes that are produced. This can help to reduce the temperature of the cutting area and can also help to prevent the lens from becoming dirty.
Another technique to reduce burnt edges is using a assist gas, like oxygen, nitrogen or compressed air, which can help to cool the cutting area and prevent the material from overheating. This can be especially useful when cutting thick or dense materials, as it can help to reduce the amount of heat generated during the cutting process.
It is also important to keep the material being cut as cool as possible. This can be achieved by using a cooling spray or mist, which can help to reduce the temperature of the material and can also help to reduce the amount of heat that is generated during the cutting process.
Lastly, a good practice is to run test cuts on scrap pieces of the same material before cutting the final product, this way you can adjust your settings and test different techniques until you find the best one for your specific material and project.
In conclusion, burnt edges can be an unsightly and potentially weakening problem when laser cutting. However, by using the right laser cutting settings, properly maintaining the laser cutter, using a fume extractor, and keeping the material cool, it is possible to reduce the likelihood of burnt edges and achieve a high-quality cut. Remember to test your settings on scrap pieces before cutting your final product, this way you can fine-tune your process and avoid any mistakes.
