![]() Like other folks have said, mechanical tuning should get you within like 5%, then you fine calibrate in the slicer with minor flow rate and line thickness adjustments etc. Start from the mechanical tuning and work your way towards software/slicing tuning. Arachne does try to compensate for that, but the function of how much is not exposed to the user. Thats why its more apparent in Cura how the relation is.įor single lines its literally just the case of the slicer not caring about that edge case, because you are rarely going to need dimensionally accurate single width walls to begin with. They often have 5% nozzle size compensation built into the profile. Slic3r derivatives pre-configure that on a conservative guessed base. The same absolute error one single on both sides unrestricted line would have. Your left wall swells to the left, the right wall swells to the right. This is exactly what is mentioned before, but applies to all walls of a model, so the left and right side of it for example, which would then come out to the rough 20% swell a single line would have. In Cura you most likely have to have about 10% Nozzle size in negative "Horizontal Expansion" to get accurate models. Take Cura as an example instead of Slic3r dervatives, Cura preconfingures NONE of that so that you have the power of deciding how much needs to be compensated. This however results in lines that arent restricted to be a bit wider by an absolute margin, model walls for example. To improve adhesion and general skin congruency slicers target that rectangle precisely, so solid skin layers receive the right amount of material. How those lines physically behave and how they end up is not in the hands of the slicer or better speaking not in its default setting. ![]() Your slicer simply calculates your model to have 0.4x0.2 for example rectangular tubes of material. Once again Ellis guide has a great representation for that. It will always calculate with that previously mentioned rectangle, which swells a bit horizontally in the middle while shrinking a bit horizontally on the top and bottom if there are no lines left and right to restrict it. Your slicer does not differentiate if a line has other lines next to it in extrusion width. Ellis Guide actually displays this very well, he also mentions to target about 20% nozzle size in this rounding and all the other factors, which would leave you at 0.08mm rough unrestricted line wider-ness. If that line of material is not restricted to the sides it will obviously not stay a perfect cube. This make it an unusable method for measuring and tuning line thickness.Įxtrusion with impacts line spacing and material deposited for a layer height x extrusion width rectangular line of material. The measurements with the micrometer screw were about 20-40% off. You will always measure the wall at the thickest point if you dont do it with an crazy expensive laser. The problem with measuring the wall thickness is, that you cannot measure the average wallthickness. We went ahead and killed it by measuring with a laserprobing machine for measuring micrometers on surface quality. We thought that the value measured seemed about right, but it wasnt. Second measuring method was to use micrometer screws. You get some kind of value, but it will just not be good. I worked in a huge university lab sometime ago and we tried different methods of measuring.įirst method was just calipers. It is not possible at all to measure the thickness of the wall. I did not read all the comments here but take the following as an advice: ![]() Non-reddit communities are listed in our getting started guide We welcome community contributions to this wiki! Related Communities Hit the report button or message the mods NEED HELP? WE HAVE A WIKI! First layer posts and spaghetti posts are now to only be posted on First layer Fridays and Spaghetti Saturdays respectively. ![]() Use the Stickied Purchase Advice Thread.News, information, links, help and fun related to 3D printing, 3D printers, additive manufacturing, etc.
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