![]() They have much higher horizontal resolution compared to FDM printers, which have to physically move a print head around. The main advantage of resin printers is the incredibly fine detail they produce. There are far more expensive SLA printers that use a laser to draw the layers, but the Mars 2 Pro, like most common resin printers, is more accurately referred to as a DLP or Digital Light Processing LCD resin 3D printer. The build plate then pulls this hardened layer off the non-stick FEP film and then moves back down, this time one layer higher, building up the model one complete layer at a time. The resin is cured or hardened by the UV light, but only in the unmasked areas. UV light is shone through the LCD screen which displays each layer as a mask. The build plate starts at the chosen layer height above the FEP film. The models are printed upside down with a build plate that lowers on a single axis into the resin tank. The bottom of the tank has a thin clear plastic film made of FEP or Fluorinated ethylene propylene which is a non-stick material like Teflon. Liquid resin sits in a resin tank on top of what is essentially a smartphone screen. Mono LCD screen underneath resin tank’s non-stick FEP film And even seeing them print, it’s not at all obvious what’s going on. ![]() Resin 3D printers also build up models in layers, but that’s where most of their similarities end. Once you see a printer like this in action it’s quite easy to understand what’s going on. I’ve reviewed a few filament or FDM printers that melt rolls of hard plastic filament and squeeze the melted plastic out of a small nozzle that moves around the printer bed, building up models in layers. Introduction to resin printing FDM printer I will compare resin printing to filament-based printing, so you might want to check out my earlier articles that introduce that technology if this is new to you. Then after covering the basics of the machine itself and the optional Mercury Plus wash and cure station, I’ll print a variety of models to see just how well the printer performs and how easy it is to use. But I’ll try and demystify the process with an introduction to resin printing. ![]() It almost magically turns liquid resin into 3D models using UV light. And despite its impressive build quality it is reasonably priced at around £250 or $250. ![]() The Elegoo Mars 2 Pro is a compact 3D resin printer that produces incredibly detailed 3D prints that almost look injection moulded. ![]()
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