<p>Prints are generally successful, but I always get a herringbone pattern on the top and bottom surfaces and striations on the sides. The herringbone is finer with finer print qualities, but it is always there. Ditto the sides. See photos.</p>
<p>Always there, regardless of temperature (using a heat tower), speed (even very slow), quality in Cura, etc.</p>
<p>Perhaps this is the best an Ender 3 Pro can do? If so, that's fine. I'm only trying to determine what this printer is capable of.</p>
<p>(Perhaps I can improve the top surface with ironing, but that isn't my question.)</p>
<p>Some things I've done with no effect: Run PLA spool from a drying cabinet; replaced extruder; reset Bowden tube; replaced nozzle; leveled bed numerous times.</p>
<p>One thing I haven't tried yet (will soon): using a better grade of PLA.</p>
<p><a href="https://i.stack.imgur.com/JvYbY.jpg" rel="nofollow noreferrer" title="Top herringbone"><img src="https://i.stack.imgur.com/JvYbY.jpg" alt="Top herringbone" title="Top herringbone" /></a></p>
<p><a href="https://i.stack.imgur.com/SQY6r.jpg" rel="nofollow noreferrer" title="Side"><img src="https://i.stack.imgur.com/SQY6r.jpg" alt="Side" title="Side" /></a></p>
<p>It's a heat tower, so the top surface was 190 °C. Speed was about 50-60 mm/s (don't remember exactly). With the belt tightened, the herringbone is much finer, but still there. The walls are much smoother, by still the layers are visible. I'm just not sure what to expect from this printer. Am I supposed to get surfaces that are perfectly smooth, or is some texture to be expected?</p>

[{'answer_id': 18139, 'author': 'Greenonline', 'author_id': 4762, 'author_profile': 'https://3dprinting.stackexchange.com/users/4762', 'pm_score': 1, 'selected': True, 'text': '<p>With a replaced Bowden tube and better PLA, the herringbone is a little better, and the layering on the sides is more regular, but still there. So, based on this and photos from others here (especially @Oscar), I think the answer to my question is YES: These ARE normal surfaces from this printer.</p>\n'}, {'answer_id': 18143, 'author': '0scar', 'author_id': 5740, 'author_profile': 'https://3dprinting.stackexchange.com/users/5740', 'pm_score': 2, 'selected': False, 'text': '<p>The top image looks as if the (top) layer(s) are <strong>under-extruding</strong>, the walls don\'t appear to be suffering from the same problem.</p>\n<p>The following image from a recent PETG print is typical for an FDM product. The deposited lines need to touch (actually, slightly overlapping, but the slicer will take care of that) each other:</p>\n<p><a href="https://i.stack.imgur.com/g83N2.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/g83N2.jpg" alt="enter image description here" /></a></p>\n<p>You will see texture (especially when there is a non uniform surface, e.g. with holes, and without an option as monotonic fill in Cura 4.11 or similar disabled), but the lines need to touch each other, you may not see the layer beneath.</p>\n<p>There are various reasons for this to happen, for instance: under-extruding because of speed or temperature issues or positioning accuracy. The walls seem to closely adhere, so this may find the cause in  slicing parameters for the filling in of the layer.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/18105', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/31249/']