All of you 3D printers and makers, we all have heard of resolution in the Z direction, aka layer size. The layer height determines the smoothness of the 3d printed model. The smaller the layer the smoother the model, the higher the resolution and so on.
” I believe it is, but not for extrusion machines. Instead, it’s important for comparing resin-based 3D printers using photo curable processes.In these machines, UV (or other) light illuminates a liquid resin surface to solidify a layer. There are generally two approaches to doing so. One approach involves a laser rapidly moving to laboriously trace the layer’s solid portions. The other typical approach is to use a DLP light source to simultaneously illuminate an array of “pixels” on the resin surface.And this is where X-Y resolution becomes important. Why? Because DLP light sources have a fixed pixel count. The array of light pixels might be 640 x 480, or 1920 x 1080, for example.Imagine if you shone the 640 x 480 array on a resin surface 100mm wide. Now shine the same pixels on a resin surface only 50mm wide. Are the solidified pixels the same size? No! They are smaller when focused on the smaller surface area.Similarly, the pixels are larger when focused on a larger surface area.In this case, X-Y resolution becomes quite important. Essentially it refers to the effective size of the solidified pixels. “