PACKAGING 101 Using Simple Packaging Techniques to Wow Your Customer

By Patrick Moore, Light Source Engraving

LightBurn’s 3D Sliced function is a game-changer for galvo users looking to add dimensionality to their coin engravings. Unlike traditional raster engraving techniques, 3D Sliced operates on a layer-by-layer basis, akin to the slicing process used in 3D printing. By resampling and rasterizing grayscale images with varying cutoff thresholds for each pass, the software transforms flat images into stunning, tactile engravings on coins that boast both visual depth and texture.

Controlling Image Parameters for Depth Enhancement

To maximize the depth and visual impact of your engravings, it’s crucial to start with a grayscale image in a photo-negative format. This format, resembling a photo negative with a Gaussian blur applied, provides the ideal foundation for achieving lifelike depth maps. In the ‘Adjust Image’ option, select 3D Sliced and then fine-tune key image parameters such as contrast, brightness, gamma, and enhancement to enhance depth perception and detail.

Increasing contrast widens the gap between dark and light areas while decreasing brightness lowers the overall luminosity of the image. Adjusting gamma darkens mid-tones, while enhancement enhances edge contrast, resulting in heightened depth perception. Experiment with these settings to achieve your desired level of depth and detail.

Another critical element is timing. This will affect the crispness of your image. You can follow this link to a video that delves into timing in more detail. https://youtu.be/NdFr70yoRyA?si=TVwAf0x3YwB7SpPd

Optimizing the Number of Passes and Material Selection

The software adapts seamlessly to any number of passes, with 256 levels of grayscale providing a versatile base for customization. Adjusting the number of passes allows you to fine-tune the depth and appearance of your engravings to suit your preferences. Although we are just looking at coins here, the 3D Sliced function is compatible with a wide range of materials, offering endless possibilities for creative expression.

Lens Selection and Interval Adjustment

Selecting the right lens is paramount to achieving optimal engraving quality and runtime efficiency. Different lenses produce varying spot sizes, which directly impact engraving resolution and speed. Additionally, adjusting the interval – the line distance between each pass – can significantly alter engraving time and final quality. By correlating the interval with the spot size, you can optimize both engraving speed and output quality for your specific laser and lens configuration.

Striving for Minimal Post-Processing with Optimal Settings

The ultimate goal of 3D coin engraving is to produce high-quality results with minimal post-processing effort. By meticulously calibrating your settings and conducting thorough testing, you can streamline your workflow and achieve consistent, professional-looking engravings. Whether it’s brass brushing, wet tumbling, light polishing, or sanding, aim for post-processing steps that require minimal time and effort, ensuring a swift and efficient production process.

Using LightBurn’s 3D Sliced function empowers you to push the boundaries of creativity and craftsmanship. By leveraging advanced image processing techniques, optimizing key parameters, and selecting the right materials and lenses, you can unlock the full potential of your laser engraving machine. With dedication, experimentation, and a keen eye for detail, you can achieve stunning results that captivate and inspire. So, what are you waiting for? Dive into the world of 3D coin engraving and unleash your artistic vision today!

Patrick Moore is a part-time pharmacist and full-time laser operator/owner at Light Source Engraving. He runs a YouTube channel providing tutorials and training for diode, CO2 Galvo and Gantry, UV, and Fiber lasers. He also develops and sells laser accessories on his website www.lightsource.pro

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