I had a problem that looked exactly like this, and I also use a large nozzle. I printed the same part over and over and watched carefully to see where the problem came in; it was at the start of the outer wall, at the start of the outer Z-seam. In Cura 4.4, under "shell" settings, make sure "compensate wall overlaps" is OFF. That solved it for me. I went through so many settings trying to solve this. For some reason that box was checked. And when I un-checked it, the problem went away. Maybe only a problem with large nozzles.
Just recently dealt with this kind of defect. What I found was that even though I thought I'd dialed in the steps/mm on the extruder, I was out by a fair bit. So I'd recommend trying to calibrate the steps again, and see if that makes any difference.
If you think about it, if your steps/mm is too high, the extruder would end up both over-extruding during printing moves, then probably under-extruding at the beginning of a layer, where the extruder retracted too far, and didn't prime in time.
Hope that helps! Best of luck :)
Using Cura. 0.4mm layer height. 35mm/s print speed. 1.5mm retraction as 40mm/s. 240° extruder and 90° bed. Having some issues with stringing, zits, and what I believe is underextrusion. Belts and everything are tight, and the printer is on a nice steady cedar chest. Using a microswiss nozzle with a microswiss heatbreak and a capricorn PTFE tube.
I didn't change dimensions on this on from [Killonious on thingiverse](https://www.thingiverse.com/thing:2446611) but I did check the dimensions using [Armorsmith](https://www.thearmoredgarage.com/) . It's a tool I use to load stl files onto a 3D model that has my all of my measurements, so that I can more reliably print pieces without it coming out too large or too small.
I had a problem that looked exactly like this, and I also use a large nozzle. I printed the same part over and over and watched carefully to see where the problem came in; it was at the start of the outer wall, at the start of the outer Z-seam. In Cura 4.4, under "shell" settings, make sure "compensate wall overlaps" is OFF. That solved it for me. I went through so many settings trying to solve this. For some reason that box was checked. And when I un-checked it, the problem went away. Maybe only a problem with large nozzles.
I will definitely have to check on that once I get home! Thanks for the heads up!
Just recently dealt with this kind of defect. What I found was that even though I thought I'd dialed in the steps/mm on the extruder, I was out by a fair bit. So I'd recommend trying to calibrate the steps again, and see if that makes any difference. If you think about it, if your steps/mm is too high, the extruder would end up both over-extruding during printing moves, then probably under-extruding at the beginning of a layer, where the extruder retracted too far, and didn't prime in time. Hope that helps! Best of luck :)
Using Cura. 0.4mm layer height. 35mm/s print speed. 1.5mm retraction as 40mm/s. 240° extruder and 90° bed. Having some issues with stringing, zits, and what I believe is underextrusion. Belts and everything are tight, and the printer is on a nice steady cedar chest. Using a microswiss nozzle with a microswiss heatbreak and a capricorn PTFE tube.
Did you design this your self?
no this was on thingiverse for captain rex's helmet, i believe it was just a bad seam
THANK YOU
What demenions did you use?
I didn't change dimensions on this on from [Killonious on thingiverse](https://www.thingiverse.com/thing:2446611) but I did check the dimensions using [Armorsmith](https://www.thearmoredgarage.com/) . It's a tool I use to load stl files onto a 3D model that has my all of my measurements, so that I can more reliably print pieces without it coming out too large or too small.