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3D printing offers limitless possibilities in creating intricate designs and complex geometries. However, the aftermath of the printing process often leaves us with a common challenge – rough edges and layer lines. In the quest for that perfect finish, we met with Scott Newcomb to explore various methods to guide you in achieving the ultimate smoothness in your 3D prints.
A common method for smoothing involves the use of acids or solvents like acetone vapors, which are especially popular for smoothing ABS (Acrylonitrile Butadiene Styrene) parts. The process can impart a mirror-like finish to the print. However, this method is limited to ABS, a material that’s trickier to handle than the more common PLA (Polylactic Acid). Moreover, it’s important to note that at NextFab, we prioritize safety and do not support the use of potentially dangerous acidic methods. Remember, sometimes the fastest route isn’t always the safest.
Sanding is a more manual and controlled approach. It involves physically sanding down the layers to achieve smoothness. However, one must consider the tolerances; a 3D printer adds layers in thousands of an inch, and sanding removes these layers. It’s a delicate balance – removing just enough material to smooth the print without altering its dimensions drastically.
Opting for a higher resolution in your 3D printing settings can result in smoother prints, albeit at the cost of significantly longer print times. This method reduces the visible layer lines but requires patience and a trade-off with time efficiency.
Products like XTC-3D, a two-part resin composite, offer an innovative solution. By mixing resin and hardener and then applying it over the parts, one can achieve a smooth finish. This method is notable for its auto-leveling property, which helps in achieving an even surface.
In Scott’s most recent project, he 3D printed skulls and smoothed the edges with XTC-3D. This smooth-on product can coat any surface: SLA and SLS, PLA, ABS, Laywoo, Powder Printed Parts, EPS, EPDM, urethane foam, wood, plaster, fabric, cardboard, and paper. In the photos below, you can see the rigid lines from the original print. After using the coating, the skull comes out shiny and smooth!
To avoid the hassle of post-processing altogether, consider using SLA (Stereolithography) printers instead of FDM (Fused Deposition Modeling) printers. SLA uses resin, allowing for finer layers and reduced visibility of lamination, ultimately resulting in a smoother finish.
While each method has its merits, it’s crucial to balance safety, precision, and time efficiency. At NextFab, we encourage exploring these methods while keeping in mind the material limitations and safety considerations. Your journey to a flawless finish in 3D printing starts with understanding these techniques and choosing the one that best aligns with your project requirements and safety standards.
Happy Printing!
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