<p>Looking at the first image, it appears that the nozzle is a little too close to the glass build plate. You clearly see that the nozzle scrapes over the glass and filament is deposited on either side of the nozzle. Re-level the bed with a (thicker) piece of paper or with a feeler gauge. Alternatively, increase the height of the nozzle by re-defining the height or add an extra Z raise in the slicer (see question: &quot;<a href="https://3dprinting.stackexchange.com/questions/13330/how-can-i-add-an-offset-to-the-first-layer-to-increase-clearance/13334">How can I add an offset to the first layer to increase clearance?</a>&quot;).</p>

CC BY-SA 4.0
2021-10-03T21:59:29.193Z
2021-10-03T21:59:29.193Z
0scar
<p>I can see a couple of problems in your images:</p>

<ol>
<li>Your bed is clearly and awfully unleveled. Check on Youtube some manual leveling using a paper.</li>
<li>Though I think your problems will be solved by correct leveling, if not, check <a href="https://3dprinting.stackexchange.com/questions/13463/raised-lines-on-top-layer-surface-ender-3/13517#13517">this</a> thread where I explain a little bit about E-step and flow rate calibration. Having these parameters right is crucial for a good first layer.</li>
<li>I don't know what you are using for layer adhesion but if after doing steps 1 and 2 the problem persists I would heat up a little bit the bed and change the adhesion material (glue, hairspray).</li>
</ol>

CC BY-SA 4.0
2020-05-11T16:21:13.193Z
2020-05-11T16:21:13.193Z
Shupper
<p>I have this CTC i3 printer; when I print square test prints, as it moves along the Y-axis back to zero (front). It extrudes lines but very thin or none at all.</p>

<p>But opposite direction along the Y axis is 100&nbsp;% </p>

<p><img src="https://i.sstatic.net/BChHj.jpg" alt="enter image description here"></p>

<p><img src="https://i.sstatic.net/PvPDT.jpg" alt="enter image description here"></p>

<prusa-i3><pla><y-axis><underextrusion>
CTC i3 Y-axis thin / no filament deposition
user3712865
# CTC i3 Y-axis thin / no filament deposition

(Asked by: username_0 on 2020-05-10)

I have this CTC i3 printer; when I print square test prints, as it moves along the Y-axis back to zero (front). It extrudes lines but very thin or none at all.

But opposite direction along the Y axis is 100 %

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

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

**Tags:** prusa-i3, pla, y-axis, underextrusion

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## 2 answers

### Answer by username_1 on 2021-10-03. Score: 1

Looking at the first image, it appears that the nozzle is a little too close to the glass build plate. You clearly see that the nozzle scrapes over the glass and filament is deposited on either side of the nozzle. Re-level the bed with a (thicker) piece of paper or with a feeler gauge. Alternatively, increase the height of the nozzle by re-defining the height or add an extra Z raise in the slicer (see question: "[How can I add an offset to the first layer to increase clearance?](https://3dprinting.stackexchange.com/questions/13330/how-can-i-add-an-offset-to-the-first-layer-to-increase-clearance/13334)").


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### Answer by username_2 on 2020-05-11. Score: 1

I can see a couple of problems in your images:

1. Your bed is clearly and awfully unleveled. Check on Youtube some manual leveling using a paper.
2. Though I think your problems will be solved by correct leveling, if not, check [this](https://3dprinting.stackexchange.com/questions/13463/raised-lines-on-top-layer-surface-ender-3/13517#13517) thread where I explain a little bit about E-step and flow rate calibration. Having these parameters right is crucial for a good first layer.
3. I don't know what you are using for layer adhesion but if after doing steps 1 and 2 the problem persists I would heat up a little bit the bed and change the adhesion material (glue, hairspray).


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