<p>This is a known issue with the v4.2.2 mainboard relating to overheating. Continued overheating will eventually result in the extruder controller on the mainboard going bad.</p>
<p>Solution: Mainboard change to version 4.2.7 and raise your unit to create more air flow. You could also add a fan under the printer.</p>

CC BY-SA 4.0
2021-07-25T14:32:57.113Z
2021-07-25T14:32:57.113Z
Michael Noble
<p>I am having some issues with my printer skipping/not extruding random layers of my prints. It happens a few layers in and sometimes doesn't even affect the entire layer. I have tried switching from Cura to PrusaSlicer but the problem persists. My printer is an Ender 3 v2 with dual Z-axis screws, a Micro Swiss all-metal hotend, Micro Swiss direct drive extruder, and a firmware update to reach 275 °C.</p>
<p>I am currently using Polymaker PC-ABS in an enclosure but I have had the same problem with Hatchbox PETG.</p>
<p>I have heard that Z Hop could be the issue when using Cura. I have tried turning it off while using Cura but it did not solve the problem. I have not tried turning it off in PrusaSlicer.</p>
<p>PrusaSlicer settings are as follows:</p>
<ul>
<li>270 °C nozzle</li>
<li>95 °C bed</li>
<li>0.22 mm layer height.</li>
<li>75 % flow for bridges with a 110° threshold for bridges</li>
<li>0.85 mm retraction @ 30 mm/s</li>
<li>Lift Z of 0.2 mm</li>
<li>3 walls</li>
<li>5 top and bottom layers</li>
<li>20 % gyroid infill</li>
<li>cooling off</li>
</ul>
<p><a href="https://i.sstatic.net/RLq65.jpg" rel="nofollow noreferrer" title="Fan duct failure"><img src="https://i.sstatic.net/RLq65.jpg" alt="Fan duct failure" title="Fan duct failure" /></a></p>

<creality-ender-3><extruder><extrusion><underextrusion><direct-drive>
Ender 3 v2 layer skips
TreeBarkEater
# Ender 3 v2 layer skips

(Asked by: username_0 on 2021-07-24)

I am having some issues with my printer skipping/not extruding random layers of my prints. It happens a few layers in and sometimes doesn't even affect the entire layer. I have tried switching from Cura to PrusaSlicer but the problem persists. My printer is an Ender 3 v2 with dual Z-axis screws, a Micro Swiss all-metal hotend, Micro Swiss direct drive extruder, and a firmware update to reach 275 °C.

I am currently using Polymaker PC-ABS in an enclosure but I have had the same problem with Hatchbox PETG.

I have heard that Z Hop could be the issue when using Cura. I have tried turning it off while using Cura but it did not solve the problem. I have not tried turning it off in PrusaSlicer.

PrusaSlicer settings are as follows:

* 270 °C nozzle
* 95 °C bed
* 0.22 mm layer height.
* 75 % flow for bridges with a 110° threshold for bridges
* 0.85 mm retraction @ 30 mm/s
* Lift Z of 0.2 mm
* 3 walls
* 5 top and bottom layers
* 20 % gyroid infill
* cooling off

[![Fan duct failure](https://i.sstatic.net/RLq65.jpg "Fan duct failure")](https://i.sstatic.net/RLq65.jpg "Fan duct failure")

**Tags:** creality-ender-3, extruder, extrusion, underextrusion, direct-drive


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## 1 answers

### Answer by username_1 on 2021-07-25. Score: 2 | Accepted answer

This is a known issue with the v4.2.2 mainboard relating to overheating. Continued overheating will eventually result in the extruder controller on the mainboard going bad.

Solution: Mainboard change to version 4.2.7 and raise your unit to create more air flow. You could also add a fan under the printer.


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