<p># SegaSingleMotorDualExtruder</p><p>The is my dual extruder with only one extrusion step motor for 3d printing.</p><p>Now is a working prototype.</p><p><br></p><p>Most dual extruder needs two step motors for each hotend to do the job.</p><p>But i think it's way too heavy for an extruder.So I try just use one step motor to do the job.</p><p><br></p><p>The other problem with dual extruder is when one hotend is working, the second would cause ooze.</p><p>Ooze will make printing model caught a lot of unwanted results.</p><p>My solution is letting the second hotend to dock on a metal plate to block hot plastic drops from nozzel.</p><p>To do that first the second nozzel need to swing and raise above metal plate.</p><p>At the same time one filament need to be caught in between idler and extrusion gear teeth with enough pressure.</p><p><br></p><p>This project have to design a brand new extruder and different firmware to acomplish goals above.</p><p>PDF files contain 3d model, can be views by adobe acrobat reader.<br></p><div>Current firmware is derived from Marlin (<a rel="nofollow" target="_blank" href="https://github.com/MarlinFirmware/Marlin">https://github.com/MarlinFirmware/Marlin</a>)<br></div><p><a rel="nofollow" target="_blank" href="https://github.com/liusega/Marlin/tree/SingleMotorDualExtruder">https://github.com/liusega/Marlin/tree/SingleMotorDualExtruder</a><br></p><p>branch: SingleMotorDualExtruder</p><p>About model file names, I am not sure those names are right. If there are any suggestion, feel free to leave any comment. </p><p>Here are some videos of how it operates.<br></p><div><u><a rel="nofollow" target="_blank" href="https://youtu.be/NqHCCAOvPtc?list=PL3762XmLwPYKiBUytoDqkcSuJ-bVJyzTX">https://youtu.be/NqHCCAOvPtc?list=PL3762XmLwPYKiBUytoDqkcSuJ-bVJyzTX</a></u></div><div><u></u><br></div><div>GitHub<br></div><div><a rel="nofollow" target="_blank" href="https://github.com/liusega/SegaSingleMotorDualExtruder">https://github.com/liusega/SegaSingleMotorDualExtruder</a><br></div>
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