Over extrusion is the phenomenon that occurs when the 3D printer's nozzle extrudes far more filament over the build plate. There doesn't necessarily have to be significant over-extrusion it might simply be a small amount of additional material being pushed out when the level is printing. Over-extrusion is the main reason why a 3D print has lines. Let’s explore these reasons and how they affect the overall process of printing: Over-Extrusion In any case, why does this mismatch begin to form? There are a number of reasons behind it. In general, such irregular lines are generated by inaccuracy or misplacement of a single layer with respect to the subsequent layers. What are the causes for these lines to appear in a 3D print? Frequently, the flaws would appear in a cyclic manner, meaning that the patterns will recur (i.e. On the sidewalls of the printed components, these incorrect layers may show as lines or ridges. However, if a problem arises during the printing process with only one of such layers, the fault can be quite obvious from the print's exterior. If everything is in order, those layers would appear to be one continuous and smooth surface. Every 3D-printed part's surface is made up of hundreds of separate layers.
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