<p>My Printrbot simple metal's extruder is jammed and I need to heat it up to unjam it. Unfortunately, the printer does't want to connect to my laptop regardless of the program I'm using (Repetier-Host or Cura 15). </p>

<p>Is there a way to use a micro SD card to heat up the printer hotend but not print anything?</p>

[{'answer_id': 5923, 'author': 'profesor79', 'author_id': 9730, 'author_profile': 'https://3dprinting.stackexchange.com/users/9730', 'pm_score': 3, 'selected': True, 'text': '<p>Sure there is. As you use Cura, you can grab any G-code file (you already have) and use it to set hotend temperature (delete the actual printing part from the file) to get something like this:</p>\n\n<pre><code>;FLAVOR:Marlin\n;TIME:102\n;Filament used: 0.0573674m\n;Layer height: 0.2\n;Generated with Cura_SteamEngine 3.3.1\n; M190 S60 ;-&gt; this sets the bed temperature so we can comment it out\n; the next line sets the hotend to 200 degrees Celsius\nM104 S200\n</code></pre>\n\n<p>As every line that starts with a semi-colon is a comment and is ignored by the printer, <code>M104 S200</code>, would be the only line you need in the printout file.</p>\n\n<p>If you\'re interested in knowing more - look here: <a href="https://reprap.org/wiki/G-code" rel="nofollow noreferrer">G-codes on reprap wiki</a></p>\n'}, {'answer_id': 6127, 'author': 'Brendan Smith', 'author_id': 6883, 'author_profile': 'https://3dprinting.stackexchange.com/users/6883', 'pm_score': 1, 'selected': False, 'text': "<p>I heated it up and was able to extract some plastic that had gotten jammed in the hot ends opening. </p>\n\n<p>I heated up the hotend by commenting out all the other lines of code in Cura's start and end G-code tabs (must have missed some because the printer moved. I would just unplug the printer when it stopped moving). I used an SD card but it would probably work with USB too. I tried to force the filament in to force the jam out of the hotend, but that did nothing.</p>\n\n<p>I took apart the extruder assembly and discovered that a section of filament that was too wide got stuck in the hotend's entrance. I pulled the filament out using me multitool and put the extruder back together. Hope this helps others with a similar problem.</p>\n"}]
['https://3dprinting.stackexchange.com/questions/5921', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/6883/']