And this is exactly where the prevention of a visible Z seam lies. This over-extrusion is due to too high pressure in the hotend. If over-extrusion occurs during this transition to the next layer, there will be a small blob of excess material. If the starting points of each layer are on top of each other, a visible seam is created along the Z axis.Īt the end of each layer, the printhead stops for a very short time and tries to stop extruding as it is moved across the Z-axis to the next layer to continue printing. When the printhead moves to the next layer, the pressure is released by an unwanted extrusion of filament. How visible it actually is depends on its position, the structure of the object and the extrusion settings.Ī visible Z seam is caused by too much pressure in the hotend. In some prints, it is more visible than in others. In principle, every 3D print has a Zseam. Z-Seam with Small Holes Z-Seam with Oozing I’ve tested all the settings hands-on to better demonstrate their effects. In this article, you’ll learn what can cause a Z-seam and how you can reduce or even avoid this printing error. Z seams can be reduced by correct extrusion settings and hidden by slicers. If the transitions are on top of each other, a seam is created along the Z axis. With particularly smooth and especially round objects this is difficult.Ī Z seam is created by over- or under-extrusion at layer transitions. With objects with corners, the slicer usually finds places where it can set the starting points of the individual layers so that they are not noticeable in the final result. The resulting print defects are usually discontinuities and sometimes accompanied by blobs or zits.Ī Z seam is usually visible on smooth and round objects that have not been printed in Vase Mode. A Z seam is a line of print defects that runs along the Z axis of a 3D print from top to bottom.
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