The bottom and top part of each model is usually filled with solid layers (100% infill). Note that the layer height (h) is used in the calculation and the implication this has - if you change the layer height, your ideal wall thickness will change as well!įor more information, check the Slic3r Flow math page (parts of this text are sourced from the same page). (This image was heavily inspired by the original source: ) This is essentially why you can’t just multiply the number of perimeters by the width of a single perimeter to get the ideal wall thickness. In order to fill the empty space and bond the perimeters together, PrusaSlicer slightly overlaps the perimeters. If we suppose no overlap (tangent paths), there would be empty space (yellow). Now let’s add a second extrusion/perimeter. (This image is a re-draw of the original source: ) Note that the extrusion width includes the two semicircular ends. PrusaSlicer assumes that the cross-section of an extrusion is a rectangle with semicircular ends. In order to understand how this number is calculated, we need to take a look at the perimeter cross-section. However, if you look at the recommendation for a 0.2 mm layer height, you will find that this is not true and the suggested value is 0.86 mm. You may think, that when the extrusion width for a perimeter is 0.45 mm, two perimeters will be 0.90 mm wide (2x0,45). If you enable Detect thin walls, you will also get a recommendation for an odd number of perimeters (1,3…). Normally you get recommendations for an even number of perimeters (2,4,6…). If you go back to your CAD drawing and change the wall thickness to this exact value, you will eliminate unnecessary perimeter overlap and your print will have a perfect wall surface finish. Recommended thin wall thicknessįor a selected number of perimeters and layer height, PrusaSlicer calculates the optimal thin wall thickness. You can get around this limitation by enabling Sequential printing. If you had multiple objects on the print bed, it would be impossible to print them continuously. Only one object at a time can be printed in the vase mode. Otherwise, PrusaSlicer will try (and fail) to create both inside and outside surfaces, so model the outside dimensions only. Furthermore, you can adjust the External perimeters Extrusion width in the Advanced menu to get a thicker/stronger/watertight vase (e.g. You can still adjust the number of bottom solid layers. Keep in mind that simply changing these settings and not enabling the vase mode is not the same as true vase mode, as the object won’t be printed continuously.
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