Whether you are an efficient engineer or a beginner maker, learning the correct uses of design equipment to prevent pitfalls and mistakes takes time and experience. Every now and then, issues come up that leave designers wondering what they did wrong or the way they could do something better. This is true in any field and Laser Marking Metal engraving is no different.
Knowing how to avoid these mistakes so they don’t show up again is half the battle. With that in mind, let’s talk about five of the very common mistakes in terms of laser engraving and the ways to prevent them in the future projects.
Mistake 1: Engraving Fabric nevertheless the Laser Burns with the Material – The initial step in avoiding burning fabric using a laser engraving/cutting machine is to understand which fabrics can withstand the procedure and also at what temperatures. Heartier fabrics including denim, canvas and leather can withstand higher power settings during engraving. But when it comes to delicate fabrics, it is essential to start your settings at high speed (near or at 100%) and low power (around 5% to 10%). Test these initial settings on some spare material, and if the fabric can withstand it, raise the power before you obtain the results you are searching for.
In terms of direct-to-garment engraving, it is actually helpful to lower the dots per inch (DPI) in which you engrave. The larger the DPI, the greater material will be removed. Engraving at a lower DPI helps guarantee the laser just slightly vaporizes the top layer and doesn’t burn entirely from the fabric. Most fabric engravings do fine at 150 to 300 DPI.
Mistake 2: Acrylic Doesn’t Create a Frosty White Engraving – Probably, this really is caused using the wrong acrylic within the application. 2 kinds of acrylics are typically utilized in laser engraving and both are suitable for different applications. Cast acrylic sheets and objects are made of a liquid acrylic which is poured into molds that will then be set into various shapes and sizes. This sort of acrylic is great for engraving since it turns a frosty white color when engraved, which makes it ideal for awards and plaques. It can be cut with a laser, but it won’t give projects flame-polished edges.
The other kind of acrylic found in laser engraving is referred to as extruded acrylic, which can be formed into sheets by a machine. Extruded acrylic is usually more affordable than cast acrylic because it is formed via a higher-volume manufacturing technique. However, it can react very differently with the laser engraving machine. This type of acrylic cuts cleanly and smoothly and produces a flame-polished edge; however, when engraved, it doesn’t produce that frosted look, but instead a precise engraving. So make sure you are using cast acrylic if you want a frosted white finish.
Mistake 3: Inconsistent Glass Engraving – Oftentimes, whenever a Fiber Laser strikes glass it will fracture the top but not engrave deeply or take away the material required to engrave fully. The fractured glass surface will generate a frosted appearance, but can be rough and chipped depending on the type of glass that is being engraved. While the frosted look is desired, no one wants a rough surface or chipping.
In order to produce a smooth frosted finish, try incorporating one or some of the tips below:
Utilize a lower resolution, about 300 DPI, which will create a better result on glass when you separate the dots you are engraving.
Modify the black in your graphic to 80 % black. Run your laser engraver with Jarvis Dithering (this dithering pattern may be found in Epilog’s print driver), which will help to provide a smooth finish.
Sometimes, applying a thin, wet sheet of newspaper or even a paper towel for the engraving area will help with heat dissipation and enhance the engraving process. Just make sure you will find no wrinkles within the paper after it is actually applied. An additional way to dissipate heat is to apply a thin coat of liquid dish soap to the area you’re engraving – either with your finger or a paper towel. Finally, if there are shards of glass after engraving, polish the area having a non-scratch scour pad.
Mistake 4: Wood Engraving Produces Different Results on the Same Setting – Wood is among the most laser-friendly materials available not just because it could be cut very easily, but also as it engraves perfectly. However, different woods have different reactions while they are laser engraved and produce different results. Lighter woods, like cherry or maple, create a nice contrast where the laser burns away the wood, while denser woods require more Laser Wire Marking Machine to cut or engrave.
Grain density can change dramatically depending on the type of wood you are working with. Cherry, alder, walnut and maple have fairly small veins of grain in them, while oak has medium to large veins. For example, when a large square pmupgg engraved into a piece of cherry, it might possess a uniform appearance; the location engraved will be smooth with little variation in height. However, when the same square was engraved into a piece of oak, its appearance would vary greatly in height and would possess a non-uniform appearance.
Jinan MORN Technology Co., Ltd. (MORN GROUP) is a leading laser machine manufacturers and exporter in China. We are specialized in fiber laser cutting machine and fiber laser marking machine with 10 years experience.
Jinan MORN Technology CO., Ltd.
Address:13F, Building 5, Qisheng Mansion,Xinluo Street,High-Tech Zone, Jinan, China, 250101
E-mail: [email protected]
Tel: (+86) 531-5557-2337