<p>Here is an extreme example of notches caused by the printer. They go along all sides but are the strongest on the Y faces. They also happen quite randomly sometimes they are tiny sometimes they are strong. </p>

<p><a href="https://i.stack.imgur.com/VQ7Sr.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VQ7Sr.jpg" alt="enter image description here"></a></p>

<p>I have tightened the belts already and while that reduced the ghosting on the X face a lot, it did nothing on the Y and actually never helped with the notches. This test cube has notches and ripples too but not that strong (the skirting on the bottom of that cube is my fault I set the bed level a little too low).</p>

<p><a href="https://i.stack.imgur.com/ZJDG4.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZJDG4.jpg" alt="enter image description here"></a></p>

<p><a href="https://i.stack.imgur.com/968jC.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/968jC.jpg" alt="enter image description here"></a></p>

<p>All models have been sliced with Ultimaker Cura and printed on an Anet A8. Flow = 110&nbsp;%, layer height of 0.1&nbsp;mm for the first example and 0.2&nbsp;mm for the cube, printing temperature = 195&nbsp;°C, no change on jerking and acceleration from default settings. Cube size = 20x20x20&nbsp;mm.</p>

<p>The printer has frame support <a href="https://www.thingiverse.com/thing:1672959" rel="nofollow noreferrer">https://www.thingiverse.com/thing:1672959</a> but no other upgrades yet.</p>

[{'answer_id': 8329, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.stackexchange.com/users/8884', 'pm_score': 3, 'selected': True, 'text': "<p>I see two problems with your printer: your filament seems to overheat in some areas, and you overextrude a little. My suspicion is, that your heating behavior is not well tuned and it overshoots the target temperature, leading to an overcooked filament, then the temperature drops below the temperature you need, leading to a wavy pattern and brown lines.</p>\n<h2>fixing</h2>\n<p>I suggest running a PID-tune cycle to get better heating behavior and then recalibrating the printer's extruder.</p>\n"}, {'answer_id': 8335, 'author': 'David Duley', 'author_id': 14637, 'author_profile': 'https://3dprinting.stackexchange.com/users/14637', 'pm_score': 0, 'selected': False, 'text': '<p>I noticed that thermistors provided with Chinese kits are not up to specs. Do yourself a favor and go to mouser or digikey and order a proper thermistor that is rated for the temperature range in question.</p>\n'}, {'answer_id': 8339, 'author': 'Barry Grumbine', 'author_id': 14641, 'author_profile': 'https://3dprinting.stackexchange.com/users/14641', 'pm_score': 0, 'selected': False, 'text': '<p>While you may very well be having temperature issues, I see two other issues:</p>\n\n<p>First, I think the "notches" are z-wobble. Z-wobble is often caused by bent z-axis threaded rods.</p>\n\n<p>I have a very similar Geeetech I3 printer. A lot of my z-wobble was cleaned up by removing the threaded rods and making them more straight. You can find videos to help you do that, just search for "threaded rod straightening".</p>\n\n<p>The other thing I did was decouple the nut on the threaded rod from the x-carriage assembly, allowing it to float in the X-Y plane as it pushes the x-carriage up. The x-carriage ought to be guided up by the smooth rods/bearings. Unfortunately, if the nut is fixed to the x-carriage, the bent threaded rods are strong enough to over-power the smooth rods/bearings and make the whole assembly wobble.</p>\n\n<p>The other problem I see is that your printer seems to be extruding too much filament. That is likely causing the little pyramid flair at the base of your print. If you tell the printer to extrude 100mm, it ought to extrude 100mm, not 110mm. Again, a search for "extruder calibration" will tell you how to do it. For me it involved extruding, measuring, a bit of math, adjusting some variables in Marlin, compiling and uploading the with Arduino IDE. Repeat until 100mm extrudes 100mm.</p>\n'}]
['https://3dprinting.stackexchange.com/questions/8328', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/5359/']