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What does precision and tolerance mean in 3D printing?
Understanding the meaning of accuracy , precision, and tolerance is imperative for achieving meaningful 3D print performance for any application. In this post, we’ll parse through what these terms mean and how to think about them in the context of 3D printing.
How does 3D printing affect accuracy and repeatability?
3D printing is an additive process, so parts are built layer by layer. Each layer introduces an opportunity for inaccuracy, and the process by which layers are formed affects the level of precision, or repeatability, of the accuracy of each layer.
Is the complexity of 3D printing really free?
While complex surfacing adds costs to a process like CNC milling, complexity in 3D printing is essentially free, though the tolerances of a 3D printed part can’t be automatically refined beyond what the printer can produce without resorting to subtractive methods.
How is the precision of a 3D printer determined?
Here are four big factors at play in determining the accuracy and precision of a 3D printer: 3D printing is an additive process, so parts are built layer by layer. Each layer introduces an opportunity for inaccuracy, and the process by which layers are formed affects the level of precision, or repeatability, of the accuracy of each layer.
How is the accuracy of a 3D printer determined?
Many 3D printer systems use this projected pixel size, or XY resolution as the overall accuracy figure—for example, taking a 75 micron projected pixel size and asserting that the accuracy of the machine is ±75 microns. This data has no implications for how accurate a printed part will be.
Why do we need micro precision 3D printers?
Micro-precision 3D printing is the optimal manufacturing process for various use cases across a wide variety of industries. The combination of ultra-high resolution, accuracy, and precision allows for more intricate, exact, and replicable parts.
What’s the acceptable range of precision for a 3D gun?
Earlier, we defined the shots on the target pictured on the right as not precise. However, if your tolerance range is fairly wide, it may be okay. The shots aren’t as close to each other as in the target on the left, but if the acceptable range of precision is the distance of ±2.5 rings, then you’re within spec.