The light source is the key variation despite the fact that the fundamental ideas are the same. Learn what it implies for 3D printing and how to choose the ideal DLP projector for your needs.
Modern 3D printing technology has made remarkable strides in the last several years, with photopolymerization and resin applications generating the majority of the enthusiasm. High resolution, superb surface quality, and remarkable precision are all advantages of this technology. Those working in this field have a variety of alternatives to select from when deciding the best approach to provide correct results, from developing intricate prototypes to producing works of art.
SLA and DLP are two such printing technologies that are often promoted as the preferred technique for resin applications and have transformed the landscape of the healthcare, medical device, and consumer goods sectors.
What distinguishes SLA and DLP 3D printers from one another? It’s important to first understand the requirements of resin workers. They need a printer that can print with extreme precision without creating unintentional holes where water or air may enter since they operate with extremely small printed components and prototypes. The size of the parts will vary as well, with some of the creations being on a scale that is too small for us to properly comprehend with our naked eyes.
Both SLA and DLP resin 3D printing techniques employ a vat setup and a light source to stabilize the liquid resin layers as they build up to finally create the object. The term “vat photopolymerization” refers to this particular kind of resin printing. But that is the extent of their similarity.
The primary difference is the kind of light source employed, even though they both use the same fundamental concept to make a product. Here is a comparison to assist you in choosing between the two.
How do SLA printers function?
One sort of vat photopolymerization that creates the item upside down in a tank of liquid resin is stereolithography (SLA) printing. A laser beam reflects off two mirror galvanometers. The laser, which is often a solid-state laser, may have a wavelength of around 405 nm and might potentially provide very precise results.
While still submerged in the resin bed, a layer of liquid resin is cured and solidifies when the laser light strikes the precise place on it. The layer eventually separates from the tank’s bottom, rises a bit, and provides place for a subsequent layer of liquid resin to be exposed to the reflected laser light in order to cure. You can choose one SLA 3D Printer from here.
It continues until the whole 3D item is removed from the liquid. The completed product is frequently cut free from the supports that were printed along with it, after which it is often cleaned and sometimes placed in a curing station.
How do DLP printers’ function?
The liquid resin vat photopolymerization materials are also used by the digital light processing 3D printer, or DLP 3D printer, which may produce the finished object either top-down or bottom-up. Through the flashing of UV light from a digital projector or light engine, it stabilizes the printed pieces. The whole printed item is bathed in this light simultaneously. The resin model’s points are all simultaneously cured.
The speed advantage is the most obvious. It takes far less time to finish a build than it does with the SLA technique since every component of the model is cured all at once. The design and refining processes, rather than the actual print, may be the most time-consuming step in the 3D process.
Depending on the size of your light engine’s pixels, DLP may provide great resolution. You may only be able to construct in tiny regions since high quality results in smaller picture sizes. What takes place if you wish to produce a significant quantity? You may “stitch” together (or combine) numerous DLP projectors to provide the space you need without compromising resolution.