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I have an Ender 3 Pro which I use together with Cura 4.2.1 (and Octoprint). I print in PLA at 180°C. The print bed is set to 70°C. The Bed temperature is lower though, since I use a glas bed on top of the heated bed. I use a print cooling fan at 100%. The layer height is set to 0.2 mm, the line width 0.4mm from the 0.4mm nozzle. My retraction is 5mm at 50mm/s.

Prints come out with heavy vertical lines and no layer adhesion at these lines. I can easily break the print apart. In other spots the print is fine. Any ideas on what could cause this problem? enter image description here

enter image description here

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The Ender-3 has a problem that stems from the way the X-axis is mounted and which can often be a source for "jumping" in the Z area. Seeing the upper photo, you can see that the bad printing seems to be on one side more than the other, leading me to believe this might be the reason:

Check if the X gantry is orthogonal to the frame on both sides and make sure the eccentric nuts are not too tight so that the wheels roll easily on it, but not spin freely.

A little drop of oil on the Z-rod might also help to remove any binding, making sure that it moves smoothly.

If your layers are bad repeatedly, it also might be a problem with the extruder. Check if the extruder arm is all intact. When I had such an issue that was recurring every 10 layers, I found the lever arm holding the wheel on it broken and occasionally loosing contact. If it is broken, I suggest swapping the extruder assembly for a metallic one.

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@Trish's answer is good, and has specific Ender-3 knowledge.

As I look at the picture, it looks as if the number of affected layers is more than one, and in the enlarged picture it looks as if all layers are present, and the layer pitch is generally consistent.

In addition to @Trish's suggestion, check for any binding in the filament that may be slowing the extruder feed. This could be periodic as the spool turns, filament catching on something in the environment, or filament wound on the spool so that it does not unspool freely.

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  • $\begingroup$ Thanks! I will check tomorrow! What do you mean by "Layer Pitch"? Is it the height of each individual layer? $\endgroup$ – Chry007 Sep 26 '19 at 20:48
  • $\begingroup$ I mean the distance between layers. $\endgroup$ – cmm Sep 27 '19 at 5:41

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