<p>I just got into 3D printing with an Ender-3 Pro. The test dog printed great, some custom small/thin objects printed good, and now I tried my first big object.</p>
<p>Designed in Tinkercad (<a href="https://www.tinkercad.com/things/1JZRKfOQHxr" rel="nofollow noreferrer">link to my (updated) design</a>), exported to .stl, sliced and printed using Cura 4.5.0 with the default 0.2 mm profile (3 layers wall thickness) and 100% infill (for strength), with the extruder at 200 °C and bed at 50 °C. Ambient temperature had been 25-ish °C.</p>
<p>The filament is a brand-new Spectrum Premium PLA (Arctic White). On its box it says it prints at 185-215 °C.</p>
<p>So I got this:</p>
<p><a href="https://i.stack.imgur.com/Z76pt.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Z76pt.jpg" alt="On the magnetic bed (front)" /></a></p>
<p><a href="https://i.stack.imgur.com/7oAAI.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7oAAI.jpg" alt="On the magnetic bed (back)" /></a></p>
<p><a href="https://i.stack.imgur.com/xjdhi.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xjdhi.jpg" alt="One leg - lower layer view" /></a></p>
<p><a href="https://i.stack.imgur.com/LY4Li.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LY4Li.jpg" alt="One leg - side view" /></a></p>
<p><a href="https://i.stack.imgur.com/3lLI8.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3lLI8.jpg" alt="Other leg - side view" /></a></p>
<p>The top (thinner) sections look OK-ish (there are some visible lines, but meh), but the transition from the bottom sections (thick) to the top has terrible layer separation and warping problems. One side of the base is actually barely holding together when I'm holding it. There is also a smaller problem mid-way at that side of the base, but it's not catastrophic.</p>
<ol>
<li>Why did that happen? What did I do wrong? How can I print it again and get it nice and strong?</li>
</ol>
<p><s>2) I have a handheld &quot;3D print pen&quot;. If I use it to fill the gaps manually, how strong will the part be? The part is meant to &quot;hug&quot; the iPad charging port, so that you can hold the iPad in the bed while charging, without pressing the cable on your body and damaging it.</s> nvm that</p>
<hr />
<p>Using wall thickness of 4, layer height 0.16 mm, 30% infill and 205 °C extruder, this is my (successful) result.</p>
<p><a href="https://i.stack.imgur.com/518RF.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/518RF.jpg" alt="Successful result on the magnetic bed" /></a>
<a href="https://i.stack.imgur.com/b3BDb.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/b3BDb.jpg" alt="Successful result in action" /></a></p>
<hr />
<p>I also repaired that broken part. Did it for the aesthetics, but it feels quite strong.</p>
<p><a href="https://i.stack.imgur.com/6t2Zb.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6t2Zb.jpg" alt="Repaired with 3D pen" /></a></p>

[{'answer_id': 13500, 'author': 'Mohamed', 'author_id': 20715, 'author_profile': 'https://3dprinting.stackexchange.com/users/20715', 'pm_score': 0, 'selected': False, 'text': '<p>The reason for this sort of error might be either \n1) a clogged nozzel, <a href="https://www.youtube.com/watch?v=bg4sOaSvimY" rel="nofollow noreferrer">try doing this </a>\n2) disturbed bed level,<a href="https://www.youtube.com/watch?v=lL3Gmy4hh3Y" rel="nofollow noreferrer">resolve this issue </a>\n3) poor filament quality,</p>\n'}, {'answer_id': 13502, 'author': 'fred_dot_u', 'author_id': 854, 'author_profile': 'https://3dprinting.stackexchange.com/users/854', 'pm_score': 4, 'selected': True, 'text': "<p>One hundred percent infill is not necessarily stronger than lower values. By having such a high infill figure, the forces on the model as it cools are magnified and not in a particularly good manner.</p>\n\n<p>Consider that you could use twenty to thirty percent infill to get the strength you require for this application, saving filament and time for the print. You've not noted how many wall layers used, but for increased strength, four to five would make for a very strong model.</p>\n"}]
['https://3dprinting.stackexchange.com/questions/13499', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/20934/']