<p>High temperature PTFE tape is rated up to 550°F, which is 288°C.  I'm wondering if it would be useful for components on the hot end to prevent oozing.  Has anyone tried it?</p>

[{'answer_id': 15085, 'author': 'Trish', 'author_id': 8884, 'author_profile': 'https://3dprinting.stackexchange.com/users/8884', 'pm_score': 0, 'selected': False, 'text': "<p>You'll need a custom firmware.</p>\n<p>Yur custom firmware will have to react to the &quot;Change extruder&quot; command differently than a normal firmware: instead of just swapping to a different extruder, you'll need to perform some operations to alter the gearing (possibly a solenoid?), and possibly include some kind of &quot;break&quot; to make sure that the filament is not slipping back without the extruder attached. However, there already is a setup that pretty much does this: the Prusa MMU2 uses something similar. The MMU does use a Bowden setup, but you could use Bowden and direct drive in combination, especially if both motors run in sync.</p>\n"}, {'answer_id': 18759, 'author': '0scar', 'author_id': 5740, 'author_profile': 'https://3dprinting.stackexchange.com/users/5740', 'pm_score': 1, 'selected': False, 'text': '<p>That is perfectly viable these days in Marlin firmware, there are options for setting this up using the configuration file, e.g.:</p>\n<pre><code>// :[0, 1, 2, 3, 4, 5, 6, 7, 8]\n#define EXTRUDERS 1\n...\n...\n...\n// A dual extruder that uses a single stepper motor\n//#define SWITCHING_EXTRUDER\n#if ENABLED(SWITCHING_EXTRUDER)\n  #define SWITCHING_EXTRUDER_SERVO_NR 0\n  #define SWITCHING_EXTRUDER_SERVO_ANGLES { 0, 90 } // Angles for E0, E1[, E2, E3]\n  #if EXTRUDERS &gt; 3\n    #define SWITCHING_EXTRUDER_E23_SERVO_NR 1\n  #endif\n#endif\n</code></pre>\n'}]
['https://3dprinting.stackexchange.com/questions/15095', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/15075/']