![]() But what is a raft, exactly?Ī raft is a horizontal mesh of filament that is laid down directly on the build platform. Most slicer programs have a pre-programmed function to quickly add a raft to an existing 3D model. ![]() There are probably more than a dozen ways to achieve these goals, such as building an enclosure to slow down the cooling process or using adhesives on the print bed.īy far, printing a raft is one of the easiest methods to avoid warping. Measures to avoid warping focus on two things: reducing the thermal stress due to uneven cooling or improving the adhesion of the first layer to the build platform. If the build has sharp edges, these tend to receive the brunt of the thermal stress, resulting in these corners “curling upwards.” What is a raft and what is its point? ![]() This tends to stress buildup on the outer edges of the build. The problem is that cooling proceeds in an uneven manner: the outer layers, being more exposed to the atmosphere, cool down at a faster rate. The cooling process continues after the filament has been placed on the build platform, eventually making the final print more durable. In a desktop 3D printer, this heating process happens in the hot end nozzle, after which the melted filament is laid down on the build platform.Īs soon as the filament exits the nozzle, it starts to cool down. The fundamental principle that makes Fused Deposition Modeling (FDM) printing possible is the ability of thermoplastics to conform to different shapes when heated to their melting temperature. To understand why printing a raft has become a common practice, we need to understand the mechanism that results in the warping or curling of a print. If this confuses you, then read on as we discuss what a raft is, when it’s appropriate to use a raft and the consequences that come along with it. One of these is building your print with a raft. Fortunately, the 3D printing community has come up with various ways to counter this problem. ![]() One of the most persistent problems that 3D printing professional encounter is warping or curling. Aside from playing around with models to produce the best-looking prints, a 3D printing professional also needs to understand the subtleties of the technology to solve the problems that are bound to come up now and then. 3D Insider is ad supported and earns money from clicks, commissions from sales, and other ways.ģD printing is as much a science as it is an art. ![]()
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