3d printer is now has been popularized in the community, but the performance of 3d printer is also many different distinctions, as the aurora erwer sla3d printer and dlp printer a comparison, then the following can be a brief understanding of the relevant differences.
There are two types of light-curing 3D printing technology, DLP?printing technology and?SLA?printing technology. The main difference between these two 3D printing technologies is the way they direct light onto the photosensitive resin of the print material.
What is light-curing 3D printing is the principle of printing an object layer by layer. The print material used is different from the rolls of film used in FDM 3D printing. The material used in light-curing 3D printing is a liquid photosensitive resin. This photosensitive resin cures chemically when exposed to light. Light-curing 3D printing is the process of shooting light onto the liquid photosensitive resin to print a solid model. In terms of accuracy, objects printed using light-curing technology are more detailed than those printed using FDM or other printing technologies, making them suitable for creating fine models, such as jewelry Prototypes, fine parts, and so on.
DLP (Direct Light Processing) light-curing 3D printing has a built-in light projector, and DLP printers use a projector to project light onto the photosensitive resin of the print material to cure it. Due to the layer-by-layer printing, the 3D model will first be cut into layers by the 3D printing software, and then the DLP projector will project the shape pattern of the first layer of 3D model onto the liquid photosensitive resin in one layer, so as to make the photosensitive resin light-curing and molding. After the first layer is finished printing, the printing platform will be elevated, so that the object to be printed will be elevated at the same time, and then the projector will project the shape pattern of the next layer of 3D model onto the photosensitive resin. The projector will then project the next layer of the 3D model onto the photosensitive resin, and the object will be printed in this repeated cascade pattern. It is worth mentioning that the object is printed upside down, which is different from FDM printing technology. Because DLP uses a projector to shine a single image of each layer onto the print platform, the image of each layer is formed as tiny squares called pixels.
As for SLA (Stereolithography) 3D printing, instead of using a light projector, it uses a laser to beam laser light onto a liquid photosensitive resin, which cures the resin layer by layer, resulting in the shape of the entire object. SLA light-curing 3D printing does not emit laser light in the same way as a DLP machine, the laser light is emitted point by point to the liquid resin to form a solidified layer. the main components of the SLA light-curing 3D printer are similar to DLP printers, including a lifting printing platform, when the first layer of light-sensitive resin solidified, the platform will be raised to a certain distance, and then the laser printing of the second layer, so on and so forth, layer by layer, layer by layer, the final printing of the shape of the whole object. An additional container holds the liquid photosensitive resin. SLA also uses two motors, one on the X-axis and the other on the Y-axis, which aim the laser at the specified print coordinates to cure the resin at that location. Using 3D slicing software, the 3D model is analyzed as a series of points and lines at different coordinates, and the SLA machine follows the coordinate path to accurately target the laser to the liquid resin of the print material.
Because SLA and DLP light-curing 3D printing do not cast light in the same way, SLA printing takes a little longer, especially for large objects, and DLP light-curing 3D printing takes a lot less time. But relative to the printable area, due to the DLP projection, so relatively fine printable area, while the SLA is not affected by the projection, so the printable area is not limited.