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Difference Between SLA and DLP 3D Printing
SLA and DLP printing methods differ in various aspects, they share some commonalities. Both processes involve exposing liquid photopolymers to light. They utilize resin tanks and are suitable for crafting intricate small-scale models. Additionally, they can handle a range of materials, including flexible and rigid substances, as well as composites like glass or ceramic blends. However, it's important to note that parts produced by these methods tend to be fragile, susceptible to degradation from sunlight exposure, and prone to warping over time.
Stereolithography (SLA), pioneered in 1984, stands out as one of the most precise 3D printing techniques available today. In contrast to DLP, SLA employs laser technology as its light source. The laser beam traverses the resin tank horizontally, solidifying material layer by layer. There are two main types of SLA machines: those with a top-down laser approach, where a plate descends with each new layer, and those employing a bottom-up laser method, with a platform rising incrementally. SLA achieves exceptionally smooth surfaces and offers a layer thickness ranging from 0.05 to 0.01 mm, enabling the production of objects with incredibly fine details.
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