<p>Looking at the skirt and the overall quality it appears that your nozzle is too close to the bed, increase the initial distance between the nozzle and the bed by increasing the Z-offset of your probe defined by <code>M851</code> or through the graphical display.</p>
<p>See <a href="/a/16605/">this answer</a> for more information on the Z-offset. Furthermore, your build surface doesn't seem to be straight, you might benefit from a more dense grid to scan your surface or use UBL (see question <a href="/q/18451/">What is ABL or UBL? Is this the same?</a>.</p>

CC BY-SA 4.0
2024-08-15T21:17:54.757Z
2024-08-15T21:17:54.757Z
0scar
<p>The first layer has these weird ridges.</p>
<p>Before the print I cleaned the bed with IPA. There is an ABL and the rest of the layers come out fine.</p>
<p>I tried 2 surfaces Gerolite and PEI (in the photo).</p>
<p>I could use some advice to get a clean first layer.</p>
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<print-quality><troubleshooting><layer>
Weird first layer ridges
Jonathan Amitkohn
# Weird first layer ridges

(Asked by: username_0 on 2024-08-15)

The first layer has these weird ridges.

Before the print I cleaned the bed with IPA. There is an ABL and the rest of the layers come out fine.

I tried 2 surfaces Gerolite and PEI (in the photo).

I could use some advice to get a clean first layer.

[![enter image description here](https://i.sstatic.net/03uZ5QCY.jpg)](https://i.sstatic.net/03uZ5QCY.jpg)

[![enter image description here](https://i.sstatic.net/LhT67ZEd.jpg)](https://i.sstatic.net/LhT67ZEd.jpg)

**Tags:** print-quality, troubleshooting, layer

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## 1 answers

### Answer by username_1 on 2024-08-15. Score: 1

Looking at the skirt and the overall quality it appears that your nozzle is too close to the bed, increase the initial distance between the nozzle and the bed by increasing the Z-offset of your probe defined by `M851` or through the graphical display.

See [this answer](/a/16605/) for more information on the Z-offset. Furthermore, your build surface doesn't seem to be straight, you might benefit from a more dense grid to scan your surface or use UBL (see question [What is ABL or UBL? Is this the same?](/q/18451/).


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