<p>Contrary to a lot of other corner related problems (where the corners are bulging), I seem to have a different problem where the corners (ONLY) seem to stick out and appear blobby in the x/y plane. This only happens for corners/edges with a fillet radius greater than 3-4mm and only in the x/y plane. Anything smaller than that radius (such a sharp corner/edge) seems to be fine. </p>

<p>Any ideas what could be causing this? </p>

<p><strong>Conditions</strong></p>

<ul>
<li>CR-10s</li>
<li>Ultimaker Cura v4.2.1</li>
<li>Material: ABS </li>
<li>Nozzle size: 0.4mm </li>
<li>Bed temp: 80&nbsp;&deg;C (I can't go any higher than this) </li>
<li>Nozzle temp: 250&nbsp;&deg;C</li>
</ul>

<p><strong>What I've tried already</strong></p>

<ul>
<li>increasing nozzle temp from 240 to 250&nbsp;&deg;C (seemed to help slightly?) </li>
<li>reduced flow rate from 100&nbsp;% to 80&nbsp;% - had a negative effect on overall print quality </li>
</ul>

<p>Thank in advance for any ideas/suggestions</p>

<p><a href="https://i.stack.imgur.com/8Y91W.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/8Y91W.jpg" alt="blobby corners"></a></p>

<p><a href="https://i.stack.imgur.com/6eWVc.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6eWVc.jpg" alt="more blobby corners"></a></p>

[{'answer_id': 11039, 'author': 'R.. GitHub STOP HELPING ICE', 'author_id': 11157, 'author_profile': 'https://3dprinting.stackexchange.com/users/11157', 'pm_score': 0, 'selected': False, 'text': "<p>150 °C is way too low for pretty much any material commonly used in 3D printing, especially ABS. I'm quite surprised anything comes out of the nozzle at all rather than just griding in the extruder gear. Most ABS filament manufacturers recommend a nozzle temperature in the range 210-250 °C. From your images, it looks like you have a lot of serious extrusion problems aside from the corners that should all go away if you print with the right temperature.</p>\n"}, {'answer_id': 11052, 'author': 'cmm', 'author_id': 2082, 'author_profile': 'https://3dprinting.stackexchange.com/users/2082', 'pm_score': 2, 'selected': True, 'text': "<p>I suspect you are printing through a usb or network connection,  and the communication rate it's to slow for any of many reasons.   A curve consists of many tiny linear movements,  each requiring a command exchange between the PC and printer. </p>\n\n<p>If you can,  try printing from an sd card plugged into the printer (I'd the printer is so equipped).</p>\n\n<p>This could be worse if the uses a Bowden extruder,  since there is now compression and windup in the filament. </p>\n"}]
['https://3dprinting.stackexchange.com/questions/11038', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/18605/']