Crafting terrain for tabletop games, architectural sculptures, and miniature models using 3D printing technology renders an unlimited range of customization. However, achieving a flawless, smooth surface finish on your 3D printed terrain can be a challenging task. Our extensive guide will explain the vital points on how to attain that smooth, quality finish on your next 3D printed terrain.
Firstly, use High-Resolution Print Settings. The resolution that your 3D printer works at is critical for smooth surface finishes. Low-resolution printing will produce a rough, stepped surface that is characteristic of a 3D printed object. Higher resolutions, on the other hand, can deliver smoother and more detailed terrain finishes. The resolution is controlled by layer thickness in 3D printing, and thus it is ideal to set the layer height to around 0.1 mm for most printers. This setting might increase the print time, but the result will be worth it.
Secondly, leverage Variable Layer Height: Modern slicer software proffers the variable layer height feature. This strategy allows the topmost layers of the print, visible to the eye, to be printed at high resolution for smooth, quality finishing. The layers below can be printed at a lower resolution to save time, without affecting the overall appearance.
Make Use of Sanding: After the print is complete, sanding is one of the simplest ways to smooth the outer surface. Starting with a coarse grit, sand the surface down gradually, transitioning to a finer grit to remove layer lines and imperfections. Sandpaper with a grit of 200 is a good starting point, gradually moving to 400 and then 800 for a smooth, polished finish. For larger prints, electric sanders can expedite the process; however, care must be exercised to avoid damaging the part.
Filler and Primer Application: Once the initial sanding is complete, apply a filler primer to the terrain’s surface. This auto-body filler helps to fill in any remaining gaps after sanding, providing a smoother base for the subsequent painting process. Apply it in light coats, allowing enough time to dry fully before adding another layer. The application of filler also offers an excellent opportunity to add texture and character to your 3D printed terrain, making it look even more realistic.
Optimize Speed and Temperature Settings: Both of these factors significantly influence the final outcome. If the print speed is too high, it can lead to uneven extrusion leading to a rough finish. Printing at a slower speed allows for better layer adhesion, ensuring improved surface quality. Likewise, temperature plays a vital role. Printing at too low of a temperature can result in weak layer adhesion, while too high can lead to over-extrusion. Therefore, keep adjusting these settings to significant effect on the quality of 3D printed terrain.
Incorporate Post-processing Techniques: Various post-processing techniques like extra sanding, vapor smoothing, cold welding, painting, or even adding a clear coat can significantly enhance the overall finish. When selecting a post-processing method, consider the filament type, desired aesthetic, durability, and safety precautions.
For instance, acetone vapor smoothing is perfect for ABS filament. The process involves exposing the 3D printed item in a closed vessel to acetone vapor. As the vapor condenses on the surface, it slightly melts the outer layer of the print, providing a glossy, smooth finish. However, it’s a relatively risky method and should be executed with proper care and ventilation.
Lastly, Material Selection: Each material has its specific characteristics affecting the final product’s quality and finish. For instance, PLA is easy to print with and widely used for 3D printed terrain, but it’s tough to sand and smooth. ABS, though more challenging to print, responds well to post-processing. Newer materials like PETG combine the best attributes of PLA and ABS, being easy to print and responding well to post-processing.
Following these crucial steps will help you attain that much-desired smooth surface finish on your 3D printed terrain. By combining high-quality print settings, sanding, priming, proper speed and temperature regulation, post-processing techniques, and material selection, you can ensure beautifully modelled terrains ready for painting and pledging on your gaming table. Remember to take your time on each step – the smoother the finish, the more breathtaking the final painted product will be.
