<p>I'm struggling to get my printer up and running for a few days now. The problem is as follows. I got a test model of a cube (40x40&nbsp;mm) and everytime I try to print it, the nozzle creates these 'lines' on the print which is caused by over extrusion I think? See image:</p>

<p><a href="https://i.stack.imgur.com/WRtT4.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WRtT4.jpg" alt="test print aborted at bottom shell"></a></p>

<p>This goes on for every bottom layer and ultimately when it starts printing the infill the nozzle starts digging into the print and I'm forced to stop the printer, see image:</p>

<p><a href="https://i.stack.imgur.com/S2tvI.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/S2tvI.jpg" alt="test print aborted during infill print"></a></p>

<p>What I have tried so far:</p>

<ul>
<li>Calibrating my extruder (by marking 100&nbsp;mm on filament and command extruding 100&nbsp;mm, check difference and adjust E step/mm accordingly)</li>
<li>Performed an auto bed leveling</li>
<li>I even halved my flow rate in the slicer (Ultimaker Cura), this gave signs of under extrusion of the first layer but the second layer looks over extruded again</li>
<li>Tried different temperatures in the range of 190-210&nbsp;&deg;C (I'm using PLA), made no significant difference</li>
</ul>

<p>My settings and gear:</p>

<ul>
<li>HE3D K280 Delta 3D printer</li>
<li>E3D V6 Volcano hot end (original, not chinese)</li>
<li>E3D Titan Extruder (original)</li>
<li>Marlin 1.1.8 using Ultimaker Cura as slicer</li>
<li>Nozzle 0.6&nbsp;mm, layer height 0.2&nbsp;mm, print speed 50&nbsp;mm/s</li>
<li>1.75&nbsp;mm PLA</li>
</ul>

<p>If anyone could help me fixing this that would be great!</p>

[{'answer_id': 10039, 'author': '0scar', 'author_id': 5740, 'author_profile': 'https://3dprinting.stackexchange.com/users/5740', 'pm_score': 1, 'selected': False, 'text': '<p>Your images look as if your initial nozzle to heat bed offset is too large. This causes the filament not to be squished. Try re-levelling and have a piece of plain printing paper have a little drag when pulled.</p>\n'}, {'answer_id': 10058, 'author': 'cmm', 'author_id': 2082, 'author_profile': 'https://3dprinting.stackexchange.com/users/2082', 'pm_score': 1, 'selected': False, 'text': '<p>I would look for Z-axis compliance or springiness.  If the Z-axis is too compliant, then it will have a "slight drag on a piece of paper" over a significant commanded Z height.</p>\n\n<p>When printing the first layer, the head will be elevated by the pressure of the plastic being extruded pressing against the bed.  When printing the second layer, the actual Z-height won\'t be a full layer higher, as the previous layer was lifted.  The second layer will also be lifted, but it will drag through the first layer.</p>\n\n<p>To test for this, manually set the z-height using a metal feeler gauge.  If you don\'t have one, use a strip cut from the side of a soda can.  Set the z-height so that there is some like pressure against the gauge.  Increase the height by 0.1mm.  The gauge should now be free.  If not, continue increasing by 0.1mm steps until the gauge is free.  That is how much compliance you have in the feed.</p>\n\n<p>From a home-designed delta I built, I know that there are several sources of this compliance.  </p>\n\n<p>First check the 12 joints.  Are they tight?  Do they have wiggle room?  That wiggle room can destroy your precision.  Try squeezing the pairs together at the top and bottom with rubber bands.</p>\n\n<p>Second, check that the print head carrier (the part that moves around) is stiff and doesn\'t flex with pressure against the nozzle.</p>\n\n<p>Third, check that the vertical travelers are following their tracks tightly.  There should be no wiggle room for them, either.</p>\n\n<p>Fourth, check the belts, which must be tight.  If there was no vertical wiggle in test three, they are probably OK, but tighter is usually better.</p>\n'}, {'answer_id': 11499, 'author': 'Avishka Dambawinna', 'author_id': 16256, 'author_profile': 'https://3dprinting.stackexchange.com/users/16256', 'pm_score': 0, 'selected': False, 'text': "<p>I think You need to re-calibrate Z steps. Sometimes Marlin default z-steps/mm won't fit for 3D printer, because it depends on the hardware(z-axis threaded rod) that used to build the 3D printer. Check whether the Z-axis moves the distance that you command it to move. (ex: command to move x distance and check whether it moves the commanded distance)</p>\n"}]
['https://3dprinting.stackexchange.com/questions/10038', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/16522/']