Novices sometimes argue that SLA and DLP are more conducive to the final performance of 3D printers, but there are significant differences in the technical approaches between SLA (Stereolithography) and DLP (Digital Light Processing), so the final product will be different. SLA molding is mainly a point-to-line, line-to-face forming process. Unlike SLA, DLP technology mainly uses DLP projection, and the entire surface of the laser is focused onto the surface of the 3D printing material during projection.
SLA vs. DLP – Simple Analysis
The technical philosophy of SLA and DLP is simple. Use a light source to illuminate a large barrel of photopolymer or resin to cure the material into the final object in the digital design file. The source of the SLA comes from the laser. DLP comes from HD projectors. By simplifying the analysis, it is easy to derive the pros and cons of the two technologies. The SLA is drawn on the resin barrel by a laser beam – lithography refers to “writing” – the image of the part, and then the internal structure is drawn, but the actual order is not necessarily the case, and the liquid is solidified into the final part line by layer.
Surface treatment is an important part of post-processing, but accuracy is also critical. The parts are all the same digital model, but the EnvisionTEC DLP has a precision of 96.3% and an SLA of only 68.0%.