I have a dimensional problem of prints. Printing the usual 20x20 cube i find a correct size at the base (2 / 3 mm ) and wider at the top. Can anyone tell me what it may be due to? The measurement at the top is 20.3 x 20.3 ... below 20x20.
Try printing slower and with fan enabled. If filament does not cool good enough I know it can distort the shape. Normally especially on edges visible. I do not think that slicers change position or extrusion for last perimeter. At to you have of course other infill pattern/density, but if the perimeter is already hardened it should not effect the size. If it is still hot and flexible the increased density may shift it a bit more then sparse infill.
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