<p>I'm building my own 3D printer (custom design, made by me and cut using a water cutting machine) but I have always had problems with the hotend clogging.</p>

<p>I have had four hotends:</p>

<ul>
<li>a J-Head;</li>
<li>a full metal;</li>
<li>a full metal made by me and;</li>
<li>my current hotend which is just a block of aluminium with a plaster cold-end 100% homemade with no precision at all.</li>
</ul>

<p>Believe it or not, this hotend is the only one that has finished a whole print (about 40 minutes), all of the others, with or without fans, haven't managed to finish one!</p>

<p>Well... this hotend has a 1.5mm hole so I guess that that's why it can print.</p>

<p>The problem with all of the others was that the 1.75mm PLA that I'm using clogged the hotend after two minutes.</p>

<p>Now I would like to buy a new, more precise, hotend. I'm using a Bowden extruder, can you suggest a good hotend?</p>

<p>This is my printer:</p>

<p><a href="https://s10.postimg.org/mhk71hq0p/IMG_20160302_204645713.jpg" rel="nofollow noreferrer"><img src="https://s10.postimg.org/mhk71hq0p/IMG_20160302_204645713.jpg" alt="Print1"></a>
<a href="https://s23.postimg.org/c7u1n63nf/IMG_20160302_204636873.jpg" rel="nofollow noreferrer"><img src="https://s23.postimg.org/c7u1n63nf/IMG_20160302_204636873.jpg" alt="Print2"></a></p>

[{'answer_id': 699, 'author': 'kamuro', 'author_id': 168, 'author_profile': 'https://3dprinting.stackexchange.com/users/168', 'pm_score': 3, 'selected': True, 'text': '<p>To make the <a href="https://3dprinting.stackexchange.com/questions/670/which-hotend-does-not-clog-and-is-good-to-use-with-a-bowden-1-75-mm-setup#comment-874">suggestion of Martin Carney</a> a real answer and shift things away from comments:</p>\n\n<p>Yes, moisture and dust can be a problem. Find elaborations on the moisture here:\n<a href="https://3dprinting.stackexchange.com/questions/84/does-filament-have-to-be-stored-in-an-airtight-environment">Does filament have to be stored in an airtight environment</a>.</p>\n\n<p>Also, dust getting into the hot end won\'t make extrusion easier. (link with suitable information needed). There are filament cleaning \'devices\' for print on thingiverse, have a look at things with the <a href="https://www.thingiverse.com/tag:filament_cleaner" rel="nofollow noreferrer">tag: filament cleaner</a>.</p>\n\n<p>There are some other things that are mostly discussed in relation to hot-end clogging, which are printing speed, retract setting and what I would call hot-end resistance. For all of those, read through this thread and refine your question according to what you tried and what the results were:\n<a href="https://3dprinting.stackexchange.com/questions/612/repeatedly-clogged-printrbot-simple-extruder">Repeatedly Clogged Printrbot Simple Extruder</a>.</p>\n'}, {'answer_id': 3058, 'author': 'Greenonline', 'author_id': 4762, 'author_profile': 'https://3dprinting.stackexchange.com/users/4762', 'pm_score': 0, 'selected': False, 'text': '<p>To add to <a href="https://3dprinting.stackexchange.com/questions/670/which-hotend-does-not-clog-and-is-good-to-use-with-a-bowden-1-75-mm-setup#answer-699">kamuro\'s answer</a>, with respect to the dust aspect, the page <a href="http://www.felixprinters.com/knowledgebase/article/filament-not-extruding-clogged-hot-end.html" rel="nofollow noreferrer">Filament Not Extruding/ Clogged Hot-End</a> makes a couple of relevent points:</p>\n\n<blockquote>\n  <ul>\n  <li><strong>Dust collector not applied around the filament:</strong>  Filament attracts a lot of dust, which can potentially all come into the\n  hot-end. In some dusty environments this could cause a clogged hot-end\n  within a few hours.</li>\n  <li><strong>Clog from the inside of the hot-end:</strong> It could be that a big dust particle is inside the hot-end tip blocking it from the inside.\n  This can be solved by handdrilling the nozzle from the inside with a\n  2mm drill provided in our webshop.</li>\n  </ul>\n</blockquote>\n'}]
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